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A Dense, Pinholes-free Pure Cubic Phase CsPbBr3 Nanocrystals Film for High-performance Photodetector

  • Original Article – Nanomaterials
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Abstract

This study demonstrates a simple centrifugal coating method to prepare high-quality pure cubic phase CsPbBr3 nanocrystal film. The resultant perovskite layers possess a uniform and dense 500 nm-thick, with a bandgap of 2.38 eV, a low trap-state density of 6.9 × 10− 15 cm− 3, and carrier mobility of approximately 19.8 cm2V− 1s− 1. Furthermore, CsPbBr3 NCs-based self-powered photodetectors with high charge carriers’ charge transfer are fabricated. The device shows a low dark current density of 1.93 × 10− 7 A/cm2 at room temperature. Such photodetectors show the highest responsivity of 3.0 AW− 1, specific detectivity of 1.2 × 1013 Jones, and external quantum efficiency (EQE) of 920% at zero bias voltage. The proposed method shows significant promise for use in the lab fabrication of optoelectronic devices based on thin films of nanocrystal perovskite materials.

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Acknowledgements

This research was funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant No. 103.02-2020.46.

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Authors and Affiliations

  1. International training institute for Science and Technology, Hanoi University of Science and Technology, No.1 Dai Co Viet, Hanoi, Vietnam

    Thanh-Tung Duong, Phuong-Nam Tran, Tuan-Pham Van, Duy-Hung Nguyen & Van-Dang Tran

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  1. Thanh-Tung Duong
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  2. Phuong-Nam Tran
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  3. Tuan-Pham Van
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  4. Duy-Hung Nguyen
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  5. Van-Dang Tran
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Contributions

Phuong-Nam Tran: Investigation, Methodology. Tuan- Pham Van: Validation,, Duy-Hung Nguyen, Writing - original draft. Van-Dang Tran: Writing - original draft. Thanh-Tung Duong: Supervision, Conceptualization, Writing - review & editing.

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Correspondence to Thanh-Tung Duong.

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Duong, TT., Tran, PN., Van, TP. et al. A Dense, Pinholes-free Pure Cubic Phase CsPbBr3 Nanocrystals Film for High-performance Photodetector. Electron. Mater. Lett. 20, 217–223 (2024). https://doi.org/10.1007/s13391-023-00448-x

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