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Journal articles on the topic 'Space charge doping'

Author: Grafiati
Published: 25 May 2024

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1

Liu, Peng, Xi Pang, Zongliang Xie, et al. "Space charge characteristics in epoxy/nano-MgO composites: Experiment and two-dimensional model simulation." Journal of Applied Physics 132, no. 16 (2022): 165501. http://dx.doi.org/10.1063/5.0104268.

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Space charge accumulation in polymer dielectrics may lead to serious electric field distortion and even insulation failure during long-term operations of power equipment and electronic devices, especially under conditions of high temperature and direct current electric stress. The addition of nanoparticles into polymer matrices has been found effective in suppressing space charge accumulation and alleviating electric field distortion issues. Yet, the underlying mechanisms of nanoparticle doping remain a challenge to explore, especially from multi-dimensional composite insights. Here, a two-dim
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2

Utamuradova, Sh B., and E. M. Naurzalieva. "SIMULATION OF POTENTIAL DISTRIBUTIONS IN THE SPACE CHARGE REGION OF SEMICONDUCTOR STRUCTURES." SEMOCONDUCTOR PHYSICS AND MICROELECTRONICS 3, no. 2 (2021): 41–46. http://dx.doi.org/10.37681/2181-1652-019-x-2021-2-7.

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The methods of description of semiconduc tor-insulator interface characteristics based on process change of MIS type structure was considered. By using Maple Software, the calculations of quantities of inversion layer charge , total charge of semiconductor, inversion layer width and SCR semiconductor total width were m ade. Also, dependence theses quantities from doping level, temperature and surface potential were obtained
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3

Jin, Xin, and Hai Wang. "Space Charge Limited Current and Magnetoresistance in Si." Advanced Materials Research 750-752 (August 2013): 952–55. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.952.

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Mott and Gurney point out1, for defect-free semiconductors, I-V curve deviates from linear Ohmic type to nonlinear space-charge limited behavior at high electric field. A surprising large magnetoresistance (MR) has been reported in space-charge limited region by Delmo2-4recently. In present work, I-V and MR curves of silicon samples with different doping concentration are measured. It is observed that I-V curve enters into space charge region at lower voltage in heavily doped samples, however, space-charge limited current is absent in lightly doped samples. Two samples show different types of
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4

Chen, Inan. "Theoretical analyses of space-charge doping in amorphous semiconductor superlattices. I. Doping superlattices." Physical Review B 32, no. 2 (1985): 879–84. http://dx.doi.org/10.1103/physrevb.32.879.

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5

Chen, Inan. "Space charge doping effects in amorphous semiconductor multi-layers." Journal of Non-Crystalline Solids 77-78 (December 1985): 1093–96. http://dx.doi.org/10.1016/0022-3093(85)90848-8.

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6

Kabalan, Amal. "Controlling the Doping Depth in Silicon Micropillars." Applied Sciences 10, no. 13 (2020): 4581. http://dx.doi.org/10.3390/app10134581.

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Micropillar arrays with radial p–n junctions are attractive for photovoltaic applications, because the light absorption and carrier collection become decoupled. The main challenge in manufacturing radial p–n junctions is achieving shallow (dopant depth <200 nm) and heavy doping (>1020 cm−3) that will allow the formation of a quasi-neutral region (QNR) and space charge region (SCR) in its tiny geometry. This experimental study investigates an approach that allows shallow and heavy doping in silicon micropillars. It aims to demonstrate that silicon dioxide (SiO2) can be used to control the
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7

Vermeersch, Rémy, Gwénolé Jacopin, Bruno Daudin, and Julien Pernot. "DX center formation in highly Si doped AlN nanowires revealed by trap assisted space-charge limited current." Applied Physics Letters 120, no. 16 (2022): 162104. http://dx.doi.org/10.1063/5.0087789.

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Electrical properties of silicon doped AlN nanowires grown by plasma assisted molecular beam epitaxy were investigated by means of temperature dependent current–voltage measurements. Following an Ohmic regime for bias lower than 0.1 V, a transition to a space-charge limited regime occurred for higher bias. This transition appears to change with the doping level and is studied within the framework of the simplified theory of space-charge limited current assisted by traps. For the least doped samples, a single, doping independent trapping behavior is observed. For the most doped samples, an elec
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8

Nath, Chandrani, and A. Kumar. "Doping level dependent space charge limited conduction in polyaniline nanoparticles." Journal of Applied Physics 112, no. 9 (2012): 093704. http://dx.doi.org/10.1063/1.4763362.

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9

Ahmad, Ashfaq, Pawel Strak, Pawel Kempisty, et al. "Polarization doping—Ab initio verification of the concept: Charge conservation and nonlocality." Journal of Applied Physics 132, no. 6 (2022): 064301. http://dx.doi.org/10.1063/5.0098909.

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In this work, we study the emergence of polarization doping in AlxGa1−xN layers with graded composition from a theoretical viewpoint. It is shown that bulk electric charge density emerges in the graded concentration region. The magnitude of the effect, i.e., the relation between the polarization bulk charge density and the concentration gradient is obtained. The appearance of mobile charge in the wurtzite structure grown along the polar direction was investigated using the combination of ab initio and drift-diffusion models. It was shown that the ab initio results can be recovered precisely by
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10

Peña-Camargo, Francisco, Jarla Thiesbrummel, Hannes Hempel, et al. "Revealing the doping density in perovskite solar cells and its impact on device performance." Applied Physics Reviews 9, no. 2 (2022): 021409. http://dx.doi.org/10.1063/5.0085286.

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Traditional inorganic semiconductors can be electronically doped with high precision. Conversely, there is still conjecture regarding the assessment of the electronic doping density in metal-halide perovskites, not to mention of a control thereof. This paper presents a multifaceted approach to determine the electronic doping density for a range of different lead-halide perovskite systems. Optical and electrical characterization techniques, comprising intensity-dependent and transient photoluminescence, AC Hall effect, transfer-length-methods, and charge extraction measurements were instrumenta
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11

Garba, I. I., R. Nasiru, Y. M. Abubakar, and U. Shehu. "Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment." Dutse Journal of Pure and Applied Sciences 10, no. 1c (2024): 201–10. http://dx.doi.org/10.4314/dujopas.v10i1c.19.

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This paper gives an insight into the need for radiation detection and the most commonly flexible and efficient radiation detector. It also examines bulk characteristics of 4H-SiC semiconductor radiation detector with Ni and Ti as metals for the contact. Bulk characterization of the device, including: doping concentration, electrons and holes behaviors, space charge and current densities were carried out. The modeling is conducted using Sentaurus Technology Computer Aided Design (TCAD) to examine charge transport in bulk 4HSiC material. Data obtained were further analyzed through Sentaurus visu
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12

Yoon, Seok Hyun, and Hwan Kim. "Experimental evidence for space charge segregation in Nb-doped BaTiO3." Journal of Materials Research 16, no. 5 (2001): 1479–86. http://dx.doi.org/10.1557/jmr.2001.0206.

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There is ample experimental evidence demonstrating space charge segregation in acceptor-doped BaTiO3. However there is still some controversy regarding donor-doped BaTiO3. Considering the space charge segregation theory in BaTiO3, the calculated driving force for space charge segregation is larger in acceptor-doped cases than in donor-doped cases. This result explains why acceptor segregation can be easily detected. However, a significant concentration of donors can also cause donor segregation. In donor and acceptor codoped BaTiO3, the grain sizes are very small, and donor segregation can be
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13

Xing, Zhaoliang, Xiangnan Hu, Yujia Liu, et al. "Effect of CNFs-Ni/LDPE electrode on space charge injection in LDPE insulating layer." Journal of Physics: Conference Series 2334, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1742-6596/2334/1/012006.

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Abstract The accumulation of space charge is considered to be an important key factor to accelerate the aging of the insulation of HVDC cables. How to reduce the accumulation of space charge in the insulation layer is an urgent problem to improve the voltage level of cables. In this paper, an approach is presented to prevent charge from the inner semiconductive layer to the insulating layer, using a modified semiconductive compound by doping magnetic carbon nanofibers. Through microwave-assisted heating, Ni was deposited on the surface of carbon nanofibers which have been pre-treated. Modified
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14

Kang, Wenbin, Shaoxing Meng, Haozhe Cui, et al. "Space Charge Accumulation in Silicone Rubber Influenced by Poole-Frenkel Effect." MATEC Web of Conferences 238 (2018): 01001. http://dx.doi.org/10.1051/matecconf/201823801001.

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With the rapid increase of electrical energy consumption in metropolises, more and more power cables are utilized in power grid or urban power network to transmit and distribute electrical energy. Silicone rubber is widely used as polymeric insulating materials of power cable accessories due to their excellent electrical and thermal performances. However, under high dc electric field space charges can accumulate inside the silicone rubber, which will distort the electric field in the bulk of the material, influencing the reliability and safety of operation. A bipolar charge injection and trans
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15

HOVSEPYAN, RUBEN, ARMEN POGHOSYAN, and EDUARD VARDANYAN. "CHARGE WAVES IN DOUBLE DOPED PHOTOCHROMIC LITHIUM NIOBATE CRYSTALS." International Journal of Modern Physics: Conference Series 15 (January 2012): 54–60. http://dx.doi.org/10.1142/s2010194512006952.

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We are presenting the experimental studies of time-space characteristics of photochromic effect in lithium niobate crystals with double doping. The photoinduced autowaves of absorption coefficient changes under the light illumination of limited part of crystal were found. An analytical model is proposed for the explanation of appearance and spreading of charge waves.
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16

UNTERREITER, A. "The quantum zero space charge model for semiconductors." European Journal of Applied Mathematics 10, no. 4 (1999): 395–415. http://dx.doi.org/10.1017/s0956792599003824.

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The thermal equilibrium state of a bipolar, isothermal quantum fluid confined to a bounded domain Ω⊂ℝd, d = 1, 2 or d = 3 is the minimizer of the total energy [Escr ]ελ; [Escr ]ελ involves the squares of the scaled Planck's constant ε and the scaled minimal Debye length λ. In applications one frequently has λ2[Lt ]1. In these cases the zero-space-charge approximation is rigorously justified. As λ → 0, the particle densities converge to the minimizer of a limiting quantum zero-space-charge functional exactly in those cases where the doping profile satisfies some compatibility conditions. Under
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17

Lübben, M., F. Cüppers, J. Mohr, et al. "Design of defect-chemical properties and device performance in memristive systems." Science Advances 6, no. 19 (2020): eaaz9079. http://dx.doi.org/10.1126/sciadv.aaz9079.

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Future development of the modern nanoelectronics and its flagships internet of things, artificial intelligence, and neuromorphic computing is largely associated with memristive elements, offering a spectrum of inevitable functionalities, atomic level scalability, and low-power operation. However, their development is limited by significant variability and still phenomenologically orientated materials’ design strategy. Here, we highlight the vital importance of materials’ purity, demonstrating that even parts-per-million foreign elements substantially change performance. Appropriate choice of c
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18

Paradisi, Andrea, Johan Biscaras, and Abhay Shukla. "Inducing conductivity in polycrystalline ZnO1-x thin films through space charge doping." Journal of Applied Physics 122, no. 9 (2017): 095301. http://dx.doi.org/10.1063/1.5001127.

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19

Tian, Xiaoling, Qingyuan Gu, Jiahua Duan, et al. "Improving Luttinger-liquid plasmons in carbon nanotubes by chemical doping." Nanoscale 10, no. 14 (2018): 6288–93. http://dx.doi.org/10.1039/c8nr00310f.

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20

Yin, Hongxia, Yingcao Cui, Yanhui Wei, Chuncheng Hao, and Qingquan Lei. "Synthesis of a Novel Semi-Conductive Composites Doping with La0.8Sr0.2MnO3 for Excellent Electric Performance for HVDC Cable." Polymers 12, no. 4 (2020): 809. http://dx.doi.org/10.3390/polym12040809.

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The semi-conductive layer located between the wire core and the insulation layer in high voltage direct current (HVDC) cable plays a vital role in uniform electric field and affecting space charges behaviors. In this work, the research idea of adding ionic conductive particles to semi-conductive materials to improve the conductive network and reduce the energy of the moving charge inside it and to suppress charge injection was proposed. Semi-conductive composites doped with different La0.8Sr0.2MnO3 (LSM) contents were prepared. Resistivity at different temperatures was measured to investigate
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21

Yu, Guang, and Yujia Cheng. "Effects of Inorganic ZnO Particle Doping on Crystalline Polymer Morphology and Space Charge Behavior." Coatings 10, no. 10 (2020): 932. http://dx.doi.org/10.3390/coatings10100932.

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This study further investigated the synergistic effect of micro- and nanofiller doping on matrix material space charges and breakdown characteristics. Accordingly, low-density polyethylene (LDPE) was used as the matrix material, and spherical ZnO particles with sizes of 30 nm and 1 µm were used as additives. Micro-ZnO/LDPE, nano-ZnO/LDPE, and micro-nano-ZnO/LDPE composites were prepared through melt blending. The crystalline morphologies of the composites were observed via polarized light microscopy. The composite crystallinity and melting peak temperature were measured via differential scanni
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22

ZHU, ZHIEN, YEWEN ZHANG, ZHENLIAN AN, and FEIHU ZHENG. "INVESTIGATION OF SPACE CHARGE TRAP LEVELS IN Al2O3 NANO-POWDER DOPED POLYETHYLENE BY PHOTO-STIMULATED DISCHARGE METHOD." International Journal of Modern Physics B 26, no. 26 (2012): 1250140. http://dx.doi.org/10.1142/s0217979212501408.

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The trap levels of Al 2 O 3 nano-powder doped LDPE with different Al 2 O 3 contents are investigated by PSD technique. The variation of trap depth in the doped LDPE can be qualitatively estimated by PSD spectra in continuous scanning method, and the distribution of trap levels in the samples can be quantitatively described in step scanning method. It is indicated that the trap levels of LDPE can be evidently deepened by Al 2 O 3 nano-powder doping with the content more than 0.1 wt%. According to the relative reports on the effect of nano-powder doping to space charge injection, it is considere
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23

Wang, Yani, Shuai Zhang, Yuanyuan Sun, Xingwu Yang, and Chun Liu. "Effect of Nano-MgO Doping in XLPE on Charge Transport and Electric Field Distribution in Composite Insulation of HVDC Cable Joint." Energies 15, no. 19 (2022): 6948. http://dx.doi.org/10.3390/en15196948.

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The space charge characteristics of cross-linked polyethylene (XLPE) can be improved to some extent by doping the appropriate amount of nano-MgO. In this study, in order to explore the influence of nano-MgO on the space charge and electric field distributions of the composite insulation of high voltage direct current (HVDC) cable joints, the effect of nano-MgO concentration on the depth and density of the deep traps in MgO/XLPE was first analyzed. On this basis, the charge transport simulation model of a 320 kV HVDC cable joint was established with MgO/XLPE as the cable insulation, and the spa
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24

Surdi, Harshad, Trevor Thornton, Robert J. Nemanich, and Stephen M. Goodnick. "Space charge limited corrections to the power figure of merit for diamond." Applied Physics Letters 120, no. 22 (2022): 223503. http://dx.doi.org/10.1063/5.0087059.

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An interpretation of the unipolar figure of merit is formulated for wide bandgap (WBG) semiconductors based on the on-state specific resistance ([Formula: see text]) derived from the space charge limited current–voltage relationship (Mott–Gurney square law). The limitations of the traditional Ohmic [Formula: see text] for WBG semiconductors are discussed, particularly at low doping, while the accuracy of the Mott–Gurney based [Formula: see text] is confirmed by Silvaco ATLAS drift–diffusion simulations of diamond Schottky pin diodes. The effects of incomplete ionization are considered as well.
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25

Chen, Inan. "Theoretical analyses of space-charge doping in amorphous semiconductor superlattices. II. Compositional superlattices." Physical Review B 32, no. 2 (1985): 885–89. http://dx.doi.org/10.1103/physrevb.32.885.

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26

Mesaros, Andrej, Kazuhiro Fujita, Stephen D. Edkins, et al. "Commensurate 4a0-period charge density modulations throughout the Bi2Sr2CaCu2O8+x pseudogap regime." Proceedings of the National Academy of Sciences 113, no. 45 (2016): 12661–66. http://dx.doi.org/10.1073/pnas.1614247113.

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Theories based upon strong real space (r-space) electron–electron interactions have long predicted that unidirectional charge density modulations (CDMs) with four-unit-cell (4a0) periodicity should occur in the hole-doped cuprate Mott insulator (MI). Experimentally, however, increasing the hole density p is reported to cause the conventionally defined wavevector QA of the CDM to evolve continuously as if driven primarily by momentum-space (k-space) effects. Here we introduce phase-resolved electronic structure visualization for determination of the cuprate CDM wavevector. Remarkably, this tech
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27

Bochkova, T. M., and S. N. Plyaka. "I─V characteristics of Bi4Ge3O12─Mn crystals in the unipolar injection mode." Journal of Physics and Electronics 27, no. 2 (2019): 81–84. http://dx.doi.org/10.15421/331929.

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Current-voltage relations in Bi4Ge3O12 ─ Mn crystals were measured under the conditions of unipolar injection of charge carriers. The characteristics obtained for electrons and holes are different. I-V curves in the case of electron injection contain ohmic, quadratic regions and regions of a sharp increase in current. This indicates the formation of a space charge enriched in electrons. The values of conductivity, effective drift mobility, and electron concentration calculated at different temperatures are close to the values obtained for pure crystals. In the case of hole injection I-V curves
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28

Zhou, Yansong, Gang Chen, Yaoguang Yu, Lichen Zhao, Qilin Yu, and Qiang He. "Effects of La-doping on charge separation behavior of ZnO:GaN for its enhanced photocatalytic performance." Catalysis Science & Technology 6, no. 4 (2016): 1033–41. http://dx.doi.org/10.1039/c5cy01193k.

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In this work, lanthanum (La) has been proven as an effective space charge layer modifier to promote efficient photogenerated charge carrier separation for ZnO:GaN solid solution photocatalysts with enhanced photocatalytic water-splitting performance.
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29

Bebitov, Rakhim, Oybek Abdulkhaev, Dilbara Yodgorova, et al. "Potential distribution over temperature sensors of p-n junction diodes with arbitrary doping of the base region." E3S Web of Conferences 401 (2023): 03062. http://dx.doi.org/10.1051/e3sconf/202340103062.

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In p-n-junction temperature sensors connected in the forwardbiased, the temperature dependence of the built-in potential is important, while in the reverse biased p-n-junction temperature sensors, it is necessary to study the temperature dependence of the built-in potential and space-charge region width.For this case, as well as for homogeneous and gradient alloyed cases, the temperature dependence of built-in potential and space-charge region widthare studied and mathematical analysis is presented for these cases.Based on these mathematical analysis, the results are obtained for cases where t
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30

Dong, Jinou, Xueqin Zhao, Licheng Fu, et al. "(Ca,K)(Zn,Mn)2As2: Ferromagnetic semiconductor induced by decoupled charge and spin doping in CaZn2As2." Journal of Semiconductors 43, no. 7 (2022): 072501. http://dx.doi.org/10.1088/1674-4926/43/7/072501.

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Abstract We have successfully synthesized a novel diluted magnetic semiconductor (Ca1−2x K2x )(Zn1− x Mn x )2As2 with decoupled charge and spin doping. The substitutions of (Ca2+, K+) and (Zn2+, Mn2+) in the parent compound CaZn2As2 (space group P m1 (No. 164)) introduce carriers and magnetic moments, respectively. Doping only Mn into CaZn2As2 does not induce any type of long range magnetic ordering. The ferromagnetic ordering arise can only when K+ and Mn2+ are simultaneously doped. The resulted maximum Curie temperature reaches ~7 K, and the corresponding coercive field is ~60 Oe. The transp
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31

Paradisi, Andrea, Johan Biscaras, and Abhay Shukla. "Space charge induced electrostatic doping of two-dimensional materials: Graphene as a case study." Applied Physics Letters 107, no. 14 (2015): 143103. http://dx.doi.org/10.1063/1.4932572.

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32

Engel, Jesse H., and A. Paul Alivisatos. "Postsynthetic Doping Control of Nanocrystal Thin Films: Balancing Space Charge to Improve Photovoltaic Efficiency." Chemistry of Materials 26, no. 1 (2013): 153–62. http://dx.doi.org/10.1021/cm402383r.

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33

Banerjee, Sreyasi, and Basudev Ghosh. "Effect of doping on amplitude modulation of space-charge wave in semiconductor quantum plasma." Indian Journal of Physics 91, no. 4 (2016): 461–69. http://dx.doi.org/10.1007/s12648-016-0939-1.

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34

Szalbot, Diana, Małgorzata Adamczyk, Beata Wodecka-Duś, Jolanta Dzik, Michał Rerak, and Kamil Feliksik. "Influence of calcium doping on microstructure, dielectric and electric properties of BaBi2Nb2O9 ceramics." Processing and Application of Ceramics 12, no. 2 (2018): 171–79. http://dx.doi.org/10.2298/pac1802171s.

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Barium bismuth niobiate (BaBi2Nb2O9) ceramics modified by calcium were prepared by solid state synthesis and two-step sintering process. An impact of calcium substitution on the A site of perovskite block is presented. The investigations are focused on dielectric as well as electric aspects of the modification. The presented results reveal that the concentration of a space charge is not preserved, what is surprising due to the homovalent nature of the dopant and no reason for creating additional lattice defects and charges connected. However, not only the valence of ions, but also the calcium-
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35

Lee, Hsin-Ying, and Hung-Lin Huang. "Investigation Performance and Mechanisms of Inverted Polymer Solar Cells by Pentacene Doped P3HT : PCBM." International Journal of Photoenergy 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/812643.

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The inverted polymer solar cells (PSCs) with pentacene-doped P3HT : PCBM absorption layers were fabricated. It was demonstrated that the pentacene doping modulated the electron mobility and the hole mobility in the resulting absorption layer. Furthermore, by varying the doping content, the optimal carrier mobility balance could be obtained. In addition, the pentacene doping led to an improvement in the crystallinity of the resulting films and made an enhancement in the light absorption, which was partly responsible for the performance improvement of the solar cells. Using the space-charge-limi
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36

Shah, M. A. K. Yousaf, Yuzheng Lu, Naveed Mushtaq, Muhammad Yousaf, and Bin Zhu. "Unraveling the synergistic effect on ionic transport of ceria via the surface engineering for low-temperature ceramic fuel cells." Applied Physics Letters 122, no. 11 (2023): 113902. http://dx.doi.org/10.1063/5.0137303.

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Recently, the multifunctional semiconductor CeO2 realized high ionic conductivity via surface conduction and delivered higher fuel cell performance. This indicates a promising strategy for the design of an electrolyte for the low-temperature ceramic fuel cell. In this study, we develop a ceria-based electrolyte by surface doping Bi into CeO2 to attain the CeBiO2 (BDC) electrolyte. The designed electrolyte is facilitated with an enriched O-vacancy surface layer, enabling high ionic conduction (0.20 S/cm) and excellent power density (1057 mW/cm2) at 530 °C. The difference in the Fermi level of B
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37

Wang, Youyuan, Yudong Li, Zhanxi Zhang, and Yanfang Zhang. "Effect of Doping Microcapsules on Typical Electrical Performances of Self-Healing Polyethylene Insulating Composite." Applied Sciences 9, no. 15 (2019): 3039. http://dx.doi.org/10.3390/app9153039.

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Polyethylene cables, as important transmission equipment of modern power grid, would inevitably be slightly damaged, which seriously threatens the safety of the power supply. This paper has pioneered the preparation and typical performances of a self-healing polyethylene insulating composite. The self-healing performance to structural damage was verified by tests of electrical and mechanical damage. The effect mechanism of doping microcapsules on the electrical performance of polyethylene was emphatically analyzed. The results show that in appropriate conditions (such as 60 °C/30 min), the com
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38

Turkulets, Yury, and Ilan Shalish. "Franz-Keldysh effect in semiconductor built-in fields: Doping concentration and space charge region characterization." Journal of Applied Physics 124, no. 7 (2018): 075102. http://dx.doi.org/10.1063/1.5038800.

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39

Liou, J. J., and F. A. Lindholm. "Low‐temperaturep‐njunction space‐charge‐region thickness including the effects of doping‐dependent dielectric permittivity." Journal of Applied Physics 64, no. 11 (1988): 6369–72. http://dx.doi.org/10.1063/1.342072.

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40

Fuks, B. I. "Theory of slow traps and random telegraph signals in ultra-small planar MOSFETs." AIP Advances 13, no. 3 (2023): 035029. http://dx.doi.org/10.1063/5.0135226.

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It is shown that ultra-small MOSFETs with heavily doped substrates contain a significant concentration of slow traps in their space-charge regions. Such a trap arises due to random doping fluctuations and is created if a few shallow impurities form a small-scale cluster, resulting in a high binding energy of the ground state of the particle on this multiply charged “nucleus.” Inside the space-charge region, this “nucleus” is surrounded by a high potential barrier, which turns it into a slow trap with capture and emission times not too different from each other. Since a multiply charged trap sc
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41

Katsufuji, T., Y. Tokura, T. Ido, and S. Uchida. "Symmetry-dependent electronic Raman scattering inLa2−xSrxCuO4: Evidence for doping-induced change in thek-space anisotropy of charge dynamics." Physical Review B 48, no. 21 (1993): 16131–34. http://dx.doi.org/10.1103/physrevb.48.16131.

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42

Verma, Deepa, Armelle Michau, Angela Vasanelli, Carlo Sirtori, and Khaled Hassouni. "Terahertz emission from a bounded plasma." Physics of Plasmas 30, no. 1 (2023): 013507. http://dx.doi.org/10.1063/5.0116748.

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The dynamics of electrons submitted to voltage pulses in a thin semiconductor layer is investigated using a kinetic approach based on the solution of the electron Boltzmann equation using particle-in-cell/Monte Carlo collision simulations. The results showed that due to the fairly high plasma density, oscillations emerge from a highly nonlinear interaction between the space-charge field and the electrons. The voltage pulse excites electron waves with dynamics and phase-space trajectories that depend on the doping level. High-amplitude oscillations take place during the relaxation phase and are
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43

Yu, Guang, Yujia Cheng, and Xiaohong Zhang. "The Dielectric Properties Improvement of Cable Insulation Layer by Different Morphology Nanoparticles Doping into LDPE." Coatings 9, no. 3 (2019): 204. http://dx.doi.org/10.3390/coatings9030204.

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Low density polyethylene (LDPE) doped with inorganic nano-MMT and nano-ZnO particles improved the dielectric properties of the cable insulation layer. In this article, nano-MMT/LDPE and nano-ZnO/LDPE composites were prepared by polymer intercalation and melt blending, respectively. The octadecyl quaternary ammonium salt and silane coupling agent were applied for surface modification in nano-MMT and nano-ZnO particles, and this then improved the compatibility of nanoparticles and polymeric matrix. These samples were characterized by FTIR, PLM, DSC and TSC, from which the effect of nanoparticles
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44

Guo, Ning, Ruixiao Meng, Junguo Gao, et al. "Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite." Energies 15, no. 13 (2022): 4821. http://dx.doi.org/10.3390/en15134821.

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The dielectric behavior of insulations is a key factor affecting the development of anti-corona materials for generators. Epoxy resin (EP), as the matrix, is blended with inorganic fillers of micron SiC and nano SiO2 to investigate the effect of micro and nano doping on the conductivity and breakdown mechanism of the composites. Using experimental and simulation analysis, it is found that the effect of nano-SiO2 doping concentration on the conductivity is related to the dispersion of SiC particles. The lower concentration of SiO2 could decrease the conductivity of the composites. The conductiv
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45

Jiang, Hongtao, Xiaohong Zhang, Junguo Gao, and Ning Guo. "Conductance Current and Space Charge Characteristics of SiO2/MMT/LDPE Micro-Nano Composites." Materials 13, no. 18 (2020): 4119. http://dx.doi.org/10.3390/ma13184119.

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Low-density polyethylene (LDPE) is one of the most comprehensive products used as insulation materials in power equipment. How to improve its dielectric properties by doping inorganic particles in LDPE has always been the focus of many researchers. In this paper, silica (SiO2) particles and montmorillonite (MMT) particles were added to LDPE, the order of adding particles was changed, and different micro-nano composites was made. The crystallization characteristics of composites were analyzed, the curves of the conductance current with the change of field intensity were analyzed, and the space
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46

Keeratithiwakorn, Poonnapa, Korakot Onlaor, T. Thiwawong, and B. Tunhoo. "Impedance Spectroscopy Studies of DCM Doped Alq3 Organic Material." Advanced Materials Research 802 (September 2013): 59–63. http://dx.doi.org/10.4028/www.scientific.net/amr.802.59.

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In this work, we report on the frequency-impedance characteristics of dye-doped organic material. The device structure is glass substrate/indium tin oxide/DCM:Alq3/Aluminum 100 nm. The influence of doping concentraion has been investigated by impedance spectroscopy. The impedance characteristics of the dye-doped organic material can be modelled by simply adopting the conventional equivalent circuit with the simple combination of resistors and capacitor network. The variation of bulk resistance with applied bias voltage as a result of the Space Charge Limited Conduction (SCLC) mechanism for cha
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47

WANG, SHU. "QUASINEUTRAL LIMIT OF THE MULTI-DIMENSIONAL DRIFT-DIFFUSION-POISSON MODELS FOR SEMICONDUCTORS WITH PN-JUNCTIONS." Mathematical Models and Methods in Applied Sciences 16, no. 04 (2006): 537–57. http://dx.doi.org/10.1142/s021820250600125x.

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In this paper the vanishing Debye length limit (space charge neutral limit) of bipolar time-dependent drift-diffusion models for semiconductors with p-n-junctions (i.e. with a fixed bipolar background charge) is studied in the multi-dimensional case. For generally smooth sign-changing doping profiles with good boundary conditions, the quasineutral limit (zero-Debye-length limit) is justified rigorously in the Sobolev's norm uniformly in time. The proof is based on the elaborate energy method and the relative entropy functional method which yields the uniform estimates with respect to the scale
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48

Engel, Jesse H., and A. Paul Alivisatos. "ChemInform Abstract: Postsynthetic Doping Control of Nanocrystal Thin Films: Balancing Space Charge to Improve Photovoltaic Efficiency." ChemInform 45, no. 9 (2014): no. http://dx.doi.org/10.1002/chin.201409236.

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49

Hashem, Abdel-Ghany, Scheuermann, et al. "Doped Nanoscale NMC333 as Cathode Materials for Li-Ion Batteries." Materials 12, no. 18 (2019): 2899. http://dx.doi.org/10.3390/ma12182899.

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A series of Li(Ni1/3Mn1/3Co1/3)1−xMxO2 (M = Al, Mg, Zn, and Fe, x = 0.06) was prepared via sol-gel method assisted by ethylene diamine tetra acetic acid as a chelating agent. A typical hexagonal α-NaFeO2 structure (R-3m space group) was observed for parent and doped samples as revealed by X-ray diffraction patterns. For all samples, hexagonally shaped nanoparticles were observed by scanning electron microscopy and transmission electron microscopy. The local structure was characterized by infrared, Raman, and Mössbauer spectroscopy and 7Li nuclear magnetic resonance (Li-NMR). Cyclic voltammetry
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50

Kienzle, O., F. Ernst, and Manfred Rühle. "Structure And Composition Of Grain Boundaries In SrTiO3." Microscopy and Microanalysis 5, S2 (1999): 94–95. http://dx.doi.org/10.1017/s1431927600013799.

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The electrical properties of SrTiO3 (strontium titanate) ceramics are strongly influenced or even dictated by grain boundary segregation of charged point defects, such as dopant atoms, impurities, vacancies, or self-interstitials. The atomistic structure of the grain boundaries, their energy, and the segregation of point defects mutually depend on each other. Grain boundary segregation of charged point defects induces the formation of space charge layers in the adjoining crystals. In order to investigate the relation between grain boundary structure and composition, grain boundaries in Fedoped
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