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Journal articles on the topic 'Dark-Bright exciton splitting'

Author: Grafiati

Published: 24 June 2023

Last updated: 31 July 2025

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1

Golovatenko, Aleksandr A., Ina V. Kalitukha, Grigorii S. Dimitriev, et al. "A Comparative Study of the Band-Edge Exciton Fine Structure in Zinc Blende and Wurtzite CdSe Nanocrystals." Nanomaterials 12, no. 23 (2022): 4269. http://dx.doi.org/10.3390/nano12234269.

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In this paper, we studied the role of the crystal structure in spheroidal CdSe nanocrystals on the band-edge exciton fine structure. Ensembles of zinc blende and wurtzite CdSe nanocrystals are investigated experimentally by two optical techniques: fluorescence line narrowing (FLN) and time-resolved photoluminescence. We argue that the zero-phonon line evaluated by the FLN technique gives the ensemble-averaged energy splitting between the lowest bright and dark exciton states, while the activation energy from the temperature-dependent photoluminescence decay is smaller and corresponds to the en

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2

Hou, Lei, Philippe Tamarat, and Brahim Lounis. "Revealing the Exciton Fine Structure in Lead Halide Perovskite Nanocrystals." Nanomaterials 11, no. 4 (2021): 1058. http://dx.doi.org/10.3390/nano11041058.

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Lead-halide perovskite nanocrystals (NCs) are attractive nano-building blocks for photovoltaics and optoelectronic devices as well as quantum light sources. Such developments require a better knowledge of the fundamental electronic and optical properties of the band-edge exciton, whose fine structure has long been debated. In this review, we give an overview of recent magneto-optical spectroscopic studies revealing the entire excitonic fine structure and relaxation mechanisms in these materials, using a single-NC approach to get rid of their inhomogeneities in morphology and crystal structure.

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3

Baranowski, Michał, Mateusz Dyksik, and Paulina Płochocka. "2D Metal Halide Perovskites: A New Fascinating Playground for Exciton Fine Structure Investigations." Scientiae Radices 01, no. 01 (2022): 3–25. http://dx.doi.org/10.58332/v22i1a01.

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Two-dimensional (2D) metal halide perovskites are natural quantum wells which consist of low bandgap metal-halide slabs, surrounded by organic spacers barriers. The quantum and dielectric confinements provided by the organic part lead to the extreme exciton binding energy which results in a huge enhancement of exciton fine structure in this material system. This makes 2D perovskites a fascinating playground for fundamental excitonic physics studies. In this review, we summarize the current understanding and quantification of the exciton fine structure in 2D perovskites. We discuss what is the

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4

SHAVER, J., A. SRIVASTAVA, J. KONO, et al. "HIGH FIELD MAGNETO-OPTICAL SPECTROSCOPY OF HIGHLY ALIGNED INDIVIDUAL AND ENSEMBLE SINGLE-WALLED CARBON NANOTUBES." International Journal of Modern Physics B 23, no. 12n13 (2009): 2667–75. http://dx.doi.org/10.1142/s0217979209062153.

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The tubular nature of single-walled carbon nanotube (SWCNT) crystals allows them to exhibit non-intuitive quantum phenomena when threaded by a magnetic flux, which breaks the time reversal symmetry and adds an Aharonov-Bohm phase to the circumferential boundary conditions on the electronic wave function. We demonstrate that such a symmetry-breaking magnetic field can dramatically "brighten" an optically-inactive, or dark, exciton state at low temperature. This phenomenon, magnetic brightening, can be understood as a consequence of interplay between the strong intervalley Coulomb mixing and fie

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5

Guilloux, Victor, Amal Ghribi, Kaïs Boujdaria, et al. "Exciton fine structure of a single highly anisotropic CsPbBr₃ nanocrystal." EPJ Web of Conferences 287 (2023): 05009. http://dx.doi.org/10.1051/epjconf/202328705009.

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We measured the photoluminescence (PL) of single CsPbBr3 nanocrystals (NCs) that have a highly anisotropic shape and orthorhombic crystal phase. As the thickness of these NCs is much more smaller than the other two dimensions, they are also called nanoplatelets (NPLs). We obtain PL spectra characterized by doublets separated in energy by about 2 meV in average and showing orthogonal and linearly polarized polar lines. We identified these doublets as the two bright-exciton states of the exciton fine structure contained in the plane of the NPLs. By a comparison between theory and experiments, we

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6

Ghribi, Amal, Rim Ben Aich, Kaïs Boujdaria, et al. "Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets." Nanomaterials 11, no. 11 (2021): 3054. http://dx.doi.org/10.3390/nano11113054.

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Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction. Short- and long-range contributions, modified by dielectric effects, are also derived, leading to a full modeliza

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7

Heyn, Christian, Andreas Gräfenstein, Geoffrey Pirard, et al. "Dot-Size Dependent Excitons in Droplet-Etched Cone-Shell GaAs Quantum Dots." Nanomaterials 12, no. 17 (2022): 2981. http://dx.doi.org/10.3390/nano12172981.

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Strain-free GaAs quantum dots (QDs) are fabricated by filling droplet-etched nanoholes in AlGaAs. Using a template of nominally identical nanoholes, the QD size is precisely controlled by the thickness of the GaAs filling layer. Atomic force microscopy indicates that the QDs have a cone-shell shape. From single-dot photoluminescence measurements, values of the exciton emission energy (1.58...1.82 eV), the exciton–biexciton splitting (1.8...2.5 meV), the exciton radiative lifetime of bright (0.37...0.58 ns) and dark (3.2...6.7 ns) states, the quantum efficiency (0.89...0.92), and the oscillator

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8

Oshima, Tsuyoshi, Kazunori Matsuno, and Hidekatsu Suzuura. "Energy splitting between bright and dark excitons in carbon nanotubes." Physica E: Low-dimensional Systems and Nanostructures 42, no. 4 (2010): 779–82. http://dx.doi.org/10.1016/j.physe.2009.11.131.

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9

Kuno, Ken. "(Invited) A Polaron Paradigm for Perovskite Nanocrystal Emitting States." ECS Meeting Abstracts MA2024-01, no. 13 (2024): 1088. http://dx.doi.org/10.1149/ma2024-01131088mtgabs.

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Perovskite NCs such as CsPbBr3 have numerous uses. Most involve exploiting their light emission and are motivated by their defect tolerance and large, as-made emission quantum yields. Absent, though, is a fundamental understanding of perovskite NC emitting states, central to these applications. Of particular note are observations of near-universal, size-, temperature-, and composition-dependent absorption/emission Stokes shifts where observed energy differences are between absorbing and emitting states. Very little is known about the origin of these shifts. Moreover, little is known about the

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10

Li, Wei-Hua, Jhen-Dong Lin, Ping-Yuan Lo, et al. "The Key Role of Non-Local Screening in the Environment-Insensitive Exciton Fine Structures of Transition-Metal Dichalcogenide Monolayers." Nanomaterials 13, no. 11 (2023): 1739. http://dx.doi.org/10.3390/nano13111739.

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In this work, we present a comprehensive theoretical and computational investigation of exciton fine structures of WSe2-monolayers, one of the best-known two-dimensional (2D) transition-metal dichalcogenides (TMDs), in various dielectric-layered environments by solving the first-principles-based Bethe–Salpeter equation. While the physical and electronic properties of atomically thin nanomaterials are normally sensitive to the variation of the surrounding environment, our studies reveal that the influence of the dielectric environment on the exciton fine structures of TMD-MLs is surprisingly li

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Kuno, Ken. "(Invited) A Polaron Paradigm for Perovskite Nanocrystal Emitting States." ECS Meeting Abstracts MA2024-02, no. 35 (2024): 2452. https://doi.org/10.1149/ma2024-02352452mtgabs.

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Perovskite nanocrystals (NCs) such as those made from CsPbBr3 have numerous uses. Most involve exploiting their light emission and are motivated by their defect tolerance and large, as-made emission quantum yields (QYs). For the latter, near unity QYs are possible. This leads to ready applications as light emitters but also intriguingly to possible material platforms for demonstrating semiconductor-based optical refrigeration. Absent, though, is a fundamental understanding of perovskite NC emitting states, central to these applications. Of particular note are observations of near-universal, si

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12

Cheng, Haowei, Kun Liang, Xuyan Deng, et al. "Optical Chirality of Gold Chiral Helicoid Nanoparticles in the Strong Coupling Region." Photonics 10, no. 3 (2023): 251. http://dx.doi.org/10.3390/photonics10030251.

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The far- and near-field chirality properties are usually characterized by circular dichroism (CD) and optical chirality (OC), respectively. As a light–matter interaction for the hybrid states consisting of plasmons and excitons, the strong coupling interactions can affect the original chiral electromagnetic modes. However, there are few works on this influence process, which prevents an in-depth understanding of chirality. Here, we theoretically investigate both the far-field and near-field characteristics of the chiral plasmonic gold helicoid nanoparticle (GHNP) to explore the chirality mecha

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13

Sukkabot, Worasak. "Atomistic Tight-Binding Theory of Electron-Hole Exchange Interaction in Morphological Evolution of CdSe/ZnS Core/Shell Nanodisk to CdSe/ZnS Core/Shell Nanorod." Journal of Nanomaterials 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/1572641.

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Based on the atomistic tight-binding theory (TB) and a configuration interaction (CI) description, the electron-hole exchange interaction in the morphological transformation of CdSe/ZnS core/shell nanodisk to CdSe/ZnS core/shell nanorod is described with the aim of understanding the impact of the structural shapes on the change of the electron-hole exchange interaction. Normally, the ground hole states confined in typical CdSe/ZnS core/shell nanocrystals are of heavy hole-like character. However, the atomistic tight-binding theory shows that a transition of the ground hole states from heavy ho

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14

Nicholas, R. J., I. B. Mortimer, L. J. Li, A. Nish, O. Portugall, and G. L. J. A. Rikken. "Temperature and Magnetic Field Dependent Photoluminescence from Carbon Nanotubes." International Journal of Modern Physics B 21, no. 08n09 (2007): 1180–88. http://dx.doi.org/10.1142/s0217979207042616.

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Photoluminescence as a function of temperature and magnetic field from single walled carbon nanotube solutions is described. This is modelled assuming that it is dominated by the small energy splitting between the dark and bright states of the singlet excitons which are found to be in the region of 1-5 meV for nanotubes of 0.8-1.2nm. The emission energies show a large red-shift due to the introduction of an Aharanov-Bohm phase by magnetic field along the tube axis and the luminescence intensity is strongly enhanced at low temperatures due to the mixing of the different valley states of the exc

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15

Lu, Zhengguang, Daniel Rhodes, Zhipeng Li, et al. "Magnetic field mixing and splitting of bright and dark excitons in monolayer MoSe 2." 2D Materials 7, no. 1 (2019): 015017. http://dx.doi.org/10.1088/2053-1583/ab5614.

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16

Ding, Huaiyi, Mei Liu, Nan Pan, et al. "Lattice Disorder-Engineered Energy Splitting between Bright and Dark Excitons in CsPbBr3 Quantum Wires." Journal of Physical Chemistry Letters 10, no. 6 (2019): 1355–60. http://dx.doi.org/10.1021/acs.jpclett.9b00551.

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17

Chen, Lan, Bin Li, Chunfeng Zhang, Xinyu Huang, Xiaoyong Wang, and Min Xiao. "Composition-Dependent Energy Splitting between Bright and Dark Excitons in Lead Halide Perovskite Nanocrystals." Nano Letters 18, no. 3 (2018): 2074–80. http://dx.doi.org/10.1021/acs.nanolett.8b00184.

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18

Biadala, Louis, Benjamin Siebers, Raquel Gomes, Zeger Hens, Dmitri R. Yakovlev, and Manfred Bayer. "Tuning Energy Splitting and Recombination Dynamics of Dark and Bright Excitons in CdSe/CdS Dot-in-Rod Colloidal Nanostructures." Journal of Physical Chemistry C 118, no. 38 (2014): 22309–16. http://dx.doi.org/10.1021/jp505887u.

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19

Hwang, Hyeong-Yong, Sehyuk Lee, Yong-Hoon Kim, et al. "Shear-strain-mediated photoluminescence manipulation in two-dimensional transition metal dichalcogenides." 2D Materials 9, no. 1 (2021): 015011. http://dx.doi.org/10.1088/2053-1583/ac351d.

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Abstract In two-dimensional transition metal dichalcogenides, normal strain can modulate electronic band structures, yet leaving the optical selection rules intact. In contrast, a shear strain can perturb the spin-valley locked band structures and possibly induce mixing of the spin subbands which in turn can transfer oscillator strength between spin-allowed bright and spin-forbidden dark excitons. Here, we report a novel scheme to manipulate photoluminescence (PL) in a monolayer WSe2-MoSe2 lateral heterostructures, controlled by an external bending method in which strong out-of-plane shear str

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20

Thompson, Joshua J. P., Mateusz Dyksik, Paulina Peksa, et al. "Phonon‐Bottleneck Enhanced Exciton Emission in 2D Perovskites." Advanced Energy Materials, March 15, 2024. http://dx.doi.org/10.1002/aenm.202304343.

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AbstractLayered halide perovskites exhibit remarkable optoelectronic properties and technological promise, driven by strongly bound excitons. The interplay of spin‐orbit and exchange coupling creates a rich excitonic landscape, determining their optical signatures and exciton dynamics. Despite the dark excitonic ground state, surprisingly efficient emission from higher‐energy bright states has puzzled the scientific community, sparking debates on relaxation mechanisms. Combining low‐temperature magneto‐optical measurements with sophisticated many‐particle theory, the origin of the bright excit

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21

Bornschlegl, Andreas J., Michael F. Lichtenegger, Leo Luber, et al. "Dark‐Bright Exciton Splitting Dominates Low‐Temperature Diffusion in Halide Perovskite Nanocrystal Assemblies." Advanced Energy Materials, February 6, 2024. http://dx.doi.org/10.1002/aenm.202303312.

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AbstractSemiconductor nanocrystals can replace conventional bulk materials completely in displays and light‐emitting diodes. Exciton transport dominates over charge carrier transport for materials with high exciton binding energies and long ligands, such as halide perovskite nanocrystal films. Here, how beneficial superlattices – nearly perfect 3D assemblies of nanocrystals ‐ are to exciton transport is investigated. Surprisingly, the high degree of order is not as crucial as the individual nanocrystal size, which strongly influences the splitting of the excitonic manifold into bright and dark

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22

Bailey, Christopher G., Lara V. Gillan, Minwoo Lee, et al. "Influence of Organic Spacer Cation on Dark Excitons in 2D Perovskites." Advanced Functional Materials, October 26, 2023. http://dx.doi.org/10.1002/adfm.202308095.

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AbstractThe organic spacer cation plays a crucial role in determining the exciton fine structure in 2D perovskites. Here, magneto‐optical spectroscopy is used to gain insight into the influence of the organic spacer on dark excitons in Ruddlesden–Popper (RP) perovskites. Using modest magnetic field strengths (<1.5 T), the optically forbidden dark exciton state can be identified and its emission properties significantly modulated via application of in‐plane magnetic fields, up to temperatures of 15 K. At low temperatures, an increase in collected photoluminescence efficiency of >30% is de

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23

Combescot, Monique, Francois Dubin, and Shiue Yuan Shiau. "Signature of electromagnetic quantum fluctuations in exciton physics." Europhysics Letters, February 21, 2022. http://dx.doi.org/10.1209/0295-5075/ac5700.

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Abstract Quantum fluctuations of the electromagnetic field are known to produce the atomic Lamb shift. We here reveal their iconic signature in semiconductor physics, through the blue-shift they produce to optically bright excitons, thus lifting the energy of these excitons above their dark counterparts. The electromagnetic field here acts in its full complexity: in addition to the longitudinal part via interband virtual Coulomb processes, the transverse part---which has been missed up to now---also acts via resonant and nonresonant virtual photons. These two parts beautifully combine to produ

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24

Kapuściński, Piotr, Alex Delhomme, Diana Vaclavkova, et al. "Rydberg series of dark excitons and the conduction band spin-orbit splitting in monolayer WSe2." Communications Physics 4, no. 1 (2021). http://dx.doi.org/10.1038/s42005-021-00692-3.

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AbstractStrong Coulomb correlations together with multi-valley electronic bands in the presence of spin-orbit interaction are at the heart of studies of the rich physics of excitons in monolayers of transition metal dichalcogenides (TMD). Those archetypes of two-dimensional systems promise a design of new optoelectronic devices. In intrinsic TMD monolayers the basic, intravalley excitons, are formed by a hole from the top of the valence band and an electron either from the lower or upper spin-orbit-split conduction band subbands: one of these excitons is optically active, the second one is dar

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25

Dyksik, Mateusz, Michal Baranowski, Joshua J. P. Thompson, et al. "Steric Engineering of Exciton Fine Structure in 2D Perovskites." Advanced Energy Materials, December 23, 2024. https://doi.org/10.1002/aenm.202404769.

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AbstractA comprehensive study of excitonic properties of 2D layered perovskites is provided, with an emphasis on understanding and controlling the exciton fine structure. First, an overview of the optical properties is presented, discussing the challenges in determining the bandgap and exciton binding energies. Through magneto‐optical spectroscopic measurements (up to B = 140 T), scaling laws are established for exciton binding energy as a function of the band gap and the diamagnetic coefficient. Using an in‐plane magnetic field, the exciton fine structure for various 2D perovskites is examine

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26

Xia, Yujie, Le Shu, Yiming Zhang, et al. "Full‐Landscape Condensation Phases for Long‐Lived Excitons in 2D Tellurium: Crystal‐Field Splitting and Finite‐Momentum Excitons." Advanced Functional Materials, September 4, 2023. http://dx.doi.org/10.1002/adfm.202303779.

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AbstractThe realization of high‐temperature exciton macroscopic quantum phases in materials still remains challenging due to strict constraints in thermal stabilities and excitonic lifetimes. In this work, by using first‐principles calculations, the exciton dispersions and macroscopic quantum phase transitions of 2D α‐ and β‐Te are investigated. The excitons with lowest eigen energy for both α‐ and β‐Te are dark restricted by the crystal‐field symmetries. The Bose–Einstein condensation (BEC) transition for α‐ and β‐Te can be realized at 165.4 and 32.8 K with low excitation power densities of 0

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27

Tamarat, Philippe, Elise Prin, Yullia Berezovska, et al. "Universal scaling laws for charge-carrier interactions with quantum confinement in lead-halide perovskites." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-35842-4.

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AbstractLead halide perovskites open great prospects for optoelectronics and a wealth of potential applications in quantum optical and spin-based technologies. Precise knowledge of the fundamental optical and spin properties of charge-carrier complexes at the origin of their luminescence is crucial in view of the development of these applications. On nearly bulk Cesium-Lead-Bromide single perovskite nanocrystals, which are the test bench materials for next-generation devices as well as theoretical modeling, we perform low temperature magneto-optical spectroscopy to reveal their entire band-edg

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28

Luo, J. W., A. Franceschetti, and A. Zunger. "Nonmonotonic size dependence of the dark/bright exciton splitting in GaAs nanocrystals." Physical Review B 79, no. 20 (2009). http://dx.doi.org/10.1103/physrevb.79.201301.

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29

Ora, Bitton, Nath Gupta Satyendra, Houben Lothar, et al. "Vacuum Rabi splitting of a dark plasmonic cavity mode revealed by fast electrons." January 24, 2020. https://doi.org/10.1038/s41467-020-14364-3.

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Recent years have seen a growing interest in strong coupling between plasmons and excitons, as a way to generate new quantum optical testbeds and influence chemical dynamics and reactivity. Strong coupling to bright plasmonic modes has been achieved even with single quantum emitters. Dark plasmonic modes fare better in some applications due to longer lifetimes, but are difficult to probe as they are subradiant. Here, we apply electron energy loss (EEL) spectroscopy to demonstrate that a dark mode of an individual plasmonic bowtie can interact with a small number of quantum emitters, as evidenc

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30

Annalisa, Brodu. "Exciton Fine Structure and Lattice Dynamics in InP/ZnSe Core/Shell Quantum Dots." July 17, 2018. https://doi.org/10.1021/acsphotonics.8b00615.

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Nanocrystalline InP quantum dots (QDs) hold promise for heavy-metal-free optoelectronic applications due to their bright and size-tunable emission in the visible range. Photochemical stability and high photoluminescence (PL) quantum yield are obtained by a diversity of epitaxial shells around the InP core. To understand and optimize the emission line shapes, the exciton fine structure of InP core/shell QD systems needs be investigated. Here, we study the exciton fine structure of InP/ZnSe core/shell QDs with core diameters ranging from 2.9 to 3.6 nm (PL peak from 2.3 to 1.95 eV at 4 K). PL dec

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31

Suzuki, Yura, and Sekika Yamamoto. "Size dependence of luminescence decay process in CsPbBr3 nanocrystals." Journal of Applied Physics 135, no. 8 (2024). http://dx.doi.org/10.1063/5.0190753.

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Lead halide perovskite nanocrystals (NCs) have superior luminescence properties compared to classical semiconductor NCs and they are considered promising materials for next-generation emitters. In this work, we measured the size and temperature dependence of the luminescence decay curve in CsPbBr3 NCs. To reproduce the experimental results, a simple model including one and two-phonon transitions between the exciton fine structures is introduced. It is found that the temperature dependence of the decay rates in small NCs is better reproduced by the two-phonon model rather than by the one-phonon

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32

Ren, L., C. Robert, M. Glazov, et al. "Control of the Bright-Dark Exciton Splitting Using the Lamb Shift in a Two-Dimensional Semiconductor." Physical Review Letters 131, no. 11 (2023). http://dx.doi.org/10.1103/physrevlett.131.116901.

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33

Wang, Shuli, Mateusz Dyksik, Carola Lampe, et al. "Thickness-Dependent Dark-Bright Exciton Splitting and Phonon Bottleneck in CsPbBr₃-Based Nanoplatelets Revealed via Magneto-Optical Spectroscopy." Nano Letters, August 29, 2022. http://dx.doi.org/10.1021/acs.nanolett.2c01826.

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Kipczak, Łucja, Natalia Zawadzka, Dipankar Jana, et al. "Impact of temperature on the brightening of neutral and charged dark excitons in WSe₂ monolayer." Nanophotonics, November 18, 2024. http://dx.doi.org/10.1515/nanoph-2024-0385.

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Abstract Optically dark states play an important role in the electronic and optical properties of monolayers (MLs) of semiconducting transition metal dichalcogenides. The effect of temperature on the in-plane-field activation of the neutral and charged dark excitons is investigated in a WSe2 ML encapsulated in hexagonal BN flakes. The brightening rates of the neutral dark (X D) and grey (X G) excitons and the negative dark trion (T D) differ substantially at particular temperature. More importantly, they weaken considerably by about 3–4 orders of magnitude with temperature increased from 4.2 K

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35

Echeverry, J. P., B. Urbaszek, T. Amand, X. Marie, and I. C. Gerber. "Splitting between bright and dark excitons in transition metal dichalcogenide monolayers." Physical Review B 93, no. 12 (2016). http://dx.doi.org/10.1103/physrevb.93.121107.

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36

Diroll, Benjamin T., Corentin Dabard, Emmanuel Lhuillier, and Sandrine Ithurria. "Band Edge Excitons and Amplified Spontaneous Emission of Mercury Chalcogenide Nanoplatelets." Advanced Optical Materials, December 27, 2023. http://dx.doi.org/10.1002/adom.202302004.

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AbstractColloidal nanoplatelets of HgSe and HgTe prepared indirectly through cation exchange reactions can transfer many of the advantageous properties of atomically precise, 2D cadmium chalcogenides to the near‐infrared (NIR) spectral window. In this work, HgSe and HgTe nanoplatelets are studied to understand their fundamental photophysical properties, particularly those areas of similarity and difference from cadmium‐based NPLs, and to examine their potential as optical gain media. Similar to cadmium chalcogenide NPLs, low‐temperature photoluminescence of HgTe NPLs displays two‐color emissio

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37

Huang, Jijun, Qiang Ke, and Xueling Lei. "First principles studies of defect centers in two-dimensional NaCl associated with spin qubits." Journal of Applied Physics 137, no. 13 (2025). https://doi.org/10.1063/5.0250329.

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Spin defects in solids offer promising quantum bits (qubits) for quantum applications. However, the precise control of defect centers in three-dimensional (3D) crystals remains challenging. In contrast, two-dimensional (2D) materials provide a superior platform for both the controlled creation and precise manipulation of defect qubits. This work employs first-principles calculations to demonstrate that 2D NaCl exhibits high stability, a wide bandgap, and negligible spin–orbit coupling, making it a potential candidate for qubit host material. Among the eleven designed defects in 2D NaCl, the Se

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