PDMS-Assisted Low-Temperature Synthesis of Submillimeter All-Inorganic Halide Perovskite Microcrystals for High-performance Photodetectors

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number2201127
Journal / PublicationAdvanced Optical Materials
Volume10
Issue number20
Online published19 Jul 2022
Publication statusPublished - 18 Oct 2022

Abstract

All-inorganic halide perovskites (AIHPs) are promising photovoltaic materials that have been extensively studied in the last decade. In addition, lead-free AIHPs are preferred because of their non-toxic and environmentally friendly nature. However, the quality of AIHPs fabricated by conventional solution processing methods is usually unsatisfactory, which leads to poor photoelectric performance. Herein, a facile polydimethylsiloxane-assisted slow evaporation method that can be readily used to synthesize high-quality AIHP microcrystals (MCs) (CsPbBr3, Cs2AgBiBr6, and L-Cs3Sb2I9) is demonstrated. The photodetection properties of the synthesized AIHP MCs and their spin-coated thin-film counterparts are thoroughly studied and compared. Owing to their superior crystallinity, AIHP MCs show better photoelectric performance than spin-coated films. The responsivity of the CsPbBr3 microcrystal photodetectors is ≈590 000 mA W−1. This work proposes a universal solution-processing method for the successful fabrication of high-quality all-inorganic lead-based (CsPbBr3), lead-free (L-Cs3Sb2I9), and double (Cs2AgBiBr6) perovskites, which can overcome the bottleneck in the development of halide perovskites and promote their applications.

Research Area(s)

  • Cs 2AgBiBr 6, Cs 3Sb 2I 9, CsPbBr 3, halide perovskites, photodetectors, polydimethylsiloxane

Citation Format(s)

PDMS-Assisted Low-Temperature Synthesis of Submillimeter All-Inorganic Halide Perovskite Microcrystals for High-performance Photodetectors. / Lai, Zhengxun; Meng, You; Wang, Fei et al.
In: Advanced Optical Materials, Vol. 10, No. 20, 2201127, 18.10.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review