Drop‐Casting Halide Microcrystals Enabled by Green Glycol Solvent for High‐Performance Photodetectors
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- Lai, Zhengxun
- Department of Materials Science and Engineering, City University of Hong Kong
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- Wang, Fei
- Department of Materials Science and Engineering, City University of Hong Kong State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences
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- Meng, You
- Department of Materials Science and Engineering, City University of Hong Kong State Key Laboratory of Terahertz and Millimeter Waves City University of Hong Kong
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- Bu, Xiuming
- Department of Materials Science and Engineering, City University of Hong Kong
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- Chen, Dong
- Department of Materials Science and Engineering, City University of Hong Kong
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- Li, Dengji
- Department of Materials Science and Engineering, City University of Hong Kong
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- Wang, Wei
- Department of Materials Science and Engineering, City University of Hong Kong
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- Liu, Chuntai
- Key Laboratory of Advanced Materials Processing & Mold (Zhengzhou University) Ministry of Education
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- 葉, 晨寶
- 九州大学先導物質化学研究所
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- 何, 頌賢
- 九州大学先導物質化学研究所
説明
Halide perovskites have attracted significant recent attention due to their remarkable photoelectric properties; however, the poor structural and moisture stability limit their use for practical utilization. Interestingly, binary halides, such as BiI3 and PbI2, are the typical constituents of halide perovskites, where they do not only have the similar outstanding properties of perovskites but also the superior stability. Herein, the synthesis of layered BiI3 and PbI2 microcrystals by simple drop-casting is investigated and their enhanced photoelectric performance compared to the thin-film counterparts obtained by conventional spin-coating is demonstrated. For the formation of high-quality layered microcrystals, the keys are adopting glycol as a green solvent and appropriate temperature during processing. Once configured into photodetectors, the BiI3 and PbI2 microcrystals exhibit a higher photocurrent, on/off current ratio, responsivity, and other performance parameters than their thin-film devices. These improved performances of microcrystals can be attributed to their superior crystallinity, thanks to the excellent solvent properties of glycol and the optimal growth temperature chosen. This work proposes a more simple and effective solution processing technique to fabricate layered binary halides with higher quality than the conventional spin-coating method, enabling the further development of halides-based optoelectronic devices.
収録刊行物
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- Advanced Photonics Research
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Advanced Photonics Research 3 (9), 2200041-, 2022-05-29
Wiley
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詳細情報 詳細情報について
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- CRID
- 1050581378933634432
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- ISSN
- 26999293
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- HANDLE
- 2324/7173497
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB