Cs4CuSb2Cl12−x
 I
 x
 (x = 0–10) nanocrystals for visible light photodetection

Mandal, Arnab; Mondal, Anamika; Bhattacharyya, Rachana; Bhattacharyya, Sayan

doi:10.1088/1361-6528/ac7ed2

Cited by 8 publications

(5 citation statements)

References 60 publications

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“…The Nyquist plots enabled us to experimentally elucidate the role of charge transfer processes in the self-powered devices under illumination (Figure S29 and Table S16). 4N4-Br/I devices exhibit the lowest contact resistance ( R CO ) and charge transfer resistance ( R CT ), and both these parameters increase unfavorably from 4N4 to 8N8. A higher carrier lifetime helps in better charge transport and photoresponse properties, and from the Bode plots, the lifetime is observed to increase as 0.02, 0.47, and 0.85 ms for 8N8-Br/I, 6N6-Br/I, and 4N4-Br/I devices, respectively (Figure S30).…”

Section: Resultsmentioning

confidence: 99%

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Mandal,

Khuntia,

Mondal

et al. 2023

J. Am. Chem. Soc.

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The organic spacer molecule is known to regulate the optoelectronic properties of two-dimensional (2D) perovskites. We show that the spacer layer thickness determines the nature of optical transitions, direct or indirect, by controlling the structural properties of the inorganic layer. The spin−orbit interactions lead to different electron spin orientations for the states associated with the conduction band minimum (CBM) and the valence band maximum (VBM). This leads to a direct as well as an indirect component of the transitions, despite them being direct in momentum space. The shorter chains have a larger direct component, leading to a better optoelectronic performance. The mixed halide Sn 2+ Dion−Jacobson (DJ) perovskite with the shortest 4-C diammonium spacer outshines the photodetection parameters of those having longer (6-C and 8-C) spacers and the corresponding Ruddlesden−Popper (RP) phases. The DJ system with a 4-C spacer and equimolar Br/I embodies an unprecedentedly high responsivity of 78.1 A W −1 under 3 V potential bias at 485 nm wavelength, among the DJ perovskites. Without any potential bias, this phase manifests the self-powered photodetection parameters of 0.085 A W −1 and 9.9 × 10 10 jones. The unusual role of electron spin texture in these high-performance photodetectors of the lead-free DJ perovskites provides an avenue to exploit the information coded in spins for semiconductor devices without any ferromagnetic supplement or magnetic field.

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Section: Resultsmentioning

confidence: 99%

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Mandal,

Khuntia,

Mondal

et al. 2023

J. Am. Chem. Soc.

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“…The materials developed were RbCu 2 I 3 microwires (UV photodetection) [27] and Cs 4 CuSb 2 Cl 12−x I x nanocrystals (visible photodetection) [28]. The performances reported were modest, with specific detectivities (D * ) in the range of 10 8 -10 9 Jones [27,28] (commercial UV and visible photodetectors have D * ∼10 12 Jones [26]), with responsivities reaching 0.38 A W −1 (340 nm wavelength illumination; RbCu 2 I 3 [27]) and 0.67 A W −1 (1-Sun illumination; Cs 4 CuSb 2 Cl 6 I 6 [28]), which is close to the ideal responsivity associated with the bandgap of ∼2 eV. These works therefore hint at the potential of Cu-based PIMs for solution-processed photodetectors, and which warrant further development.…”

Section: Photodetection Applications Of Pimsmentioning

confidence: 99%

Perovskite-inspired materials for energy applications

Hoye

2023

Nanotechnology

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Lead-halide perovskites have come to dominate the emerging photovoltaics research scene over the past decade. But whilst perovskite photovoltaics exhibit exceptional efficiencies, their limited stability, as well as the toxicity of their lead component remain challenges. This Focus Collection captures a snapshot of the efforts in the community to address these challenges, from modifications to the synthesis and device structure of perovskite photovoltaics to improve their stability, through to efforts to understand, develop, and improve lead-free perovskite-inspired materials (PIMs). PIMs range from direct perovskite-derivatives (e.g., CsSnI3 or halide elpasolites) through to electronic analogues (e.g., BiOI). The Collection discusses the application of these materials not only for solar cells, but also more broadly for photodetection, light emission, and anti-counterfeiting devices. This collection emphasizes the diversity of strategies and directions in this field, as well as its highly interdisciplinary nature.

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“…The photovoltaic (PSC) and optoelectronic (photodetector, FET, and LED) devices with the NC films are discussed in the light of the NC film quality along with the highest obtained photovoltaic and optoelectronic parameters. Here we have focused our discussion on the lead-based perovskite systems, although lead-free perovskite optoelectronic devices are also prevalent in the literature, albeit with compromised performances …”

Section: Introductionmentioning

confidence: 99%

Perovskite Nanostructure Films for Optoelectronics and Photovoltaics

2023

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Metal halide perovskite (MHP) nanocrystals (NCs) having different dimensionalities are considered as stable alternatives to the 3D bulk perovskites as photo absorbers in photovoltaic and optoelectronic devices. The MHP NCs with confinement effects along one or more directions can be synthesized in a relatively more pure form than the bulk perovskites as a result of the coordination of surface ligands with the perovskite phase. Moreover, the MHP NC growth and crystallization, morphology changes, and crystallographic facet engineering largely depend on the reaction conditions, the choice of ligands, as well as the precursor type and concentration. Despite having very rich electronic and optical properties both in the solution and in the films, the MHP NC films are limited by the impediments of NC-connectivity and carrier trapping. Herein, appropriate passivation methods and antisolvent treatment are needed to render good quality films with bright luminescence. This perspective highlights the advantages and challenges of the MHP nanostructures for photovoltaics and optoelectronics due to their nucleation and growth processes, film preparation, surface chemistry, dimensionality, and electronic and optical properties.

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Cs₄CuSb₂Cl_12−xI _x (x = 0–10) nanocrystals for visible light photodetection

Cited by 8 publications

References 60 publications

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Perovskite-inspired materials for energy applications

Perovskite Nanostructure Films for Optoelectronics and Photovoltaics

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Cs4CuSb2Cl12−x I x (x = 0–10) nanocrystals for visible light photodetection

Cited by 8 publications

References 60 publications

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Spin Texture Sensitive Photodetection by Dion–Jacobson Tin Halide Perovskites

Perovskite-inspired materials for energy applications

Perovskite Nanostructure Films for Optoelectronics and Photovoltaics

Contact Info

Product

Resources

About

Cs₄CuSb₂Cl_12−xI _x (x = 0–10) nanocrystals for visible light photodetection