Perovskite single crystal for optoelectronic application
Dai-Bin Kuang a
a Sun Yat-sen University, Guangzhou 510275, China
nanoGe Perovskite Conferences
Proceedings of International online conference on Hybrid materials and optoelectronic devices (HYBRIDOE)
Online, Spain, 2020 December 15th - 17th
Organizers: Xueqing Xu, Baomin Xu, Hin-Lap (Angus) Yip and Xinhua Zhong
Invited Speaker, Dai-Bin Kuang, presentation 020
DOI: https://doi.org/10.29363/nanoge.hybridoe.2020.020
Publication date: 4th December 2020

Metal halide perovskite single crystals have aroused significant research interests due to their outstanding properties, such as high extinction coefficient, low trap density, high mobility, and long charge carrier diffusion length. However, the fabrication of perovskite single crystals with large area and tunable thickness is remaining challenge. We developed a space-limited inverse temperature crystallization (SLITC) method to in situ grow large area (120 cm2) CH3NH3PbBr3 single crystal films with adjustable thickness of 0.1–0.8 mm.1 Furthermore, the laminar CH3NH3PbBr3 perovskite single crystal films with a thickness of 16 μm were realized which shown high power conversion efficiency of 7.11%.2 Recently, lead-free metal halide Cs3Bi2I9 perovskite single crystal film with thickness of 1 μm has been prepared which shown superior charge carrier mobility and enhanced on/off ratio than those polycrystal thin films.3

Low dimensional perovskite single crystals feature highly localized charge carriers and low trap density, which enable the radiative recombination of excitons and participate in high PLQY. A novel lead-free indium-based single crystal Cs2InBr5·H2O with PLQY of 33.0% was reported which exhibited water detection ability through the in situ transformation between hydrated Cs2InBr5·H2O and dehydrated complex.4 Bimetallic halide materials usually generate synergistic effect between different centers, we combined a heavy atom Bi3+ with highly efficient emission center Mn2+ to construct polynuclear metal halide perovskite (Cs4MnBi2Cl12).5 Benefit from the large effective atomic number of Bi, the Cs4MnBi2Cl12 single crystal was assembled as X-ray scintillator application. The future research will focus on the development of low toxicity and highly stable materials for high performance solar cell, LED and photodetector.

 

References:

1. H.-S. Rao, W.-G. Li, B.-X. Chen, D.-B. Kuang, C.-Y. Su. Adv. Mater. 2017, 29, 1602639.

2. H.-S. Rao, B.-X. Chen, X.-D. Wang, D.-B. Kuang, C.-Y. Su. Chem. Commun. 2017, 53, 5163-5166.

3. W.-G. Li, X.-D. Wang, J.-F. Liao, Y. Jiang, D.-B. Kuang. Adv. Funct. Mater. 2020, 30, 1909701.

4. L. Zhou, J.-F. Liao, Z.-G. Huang, J.-H. Wei, X.-D. Wang, W.-G. Li, H.-Y. Chen, D.-B. Kuang, C.-Y. Su. Angew. Chem. Int. Ed. 2019, 58, 5277-5281; Angew. Chem. 2019, 131, 5331–5335.

5. J.-H. Wei, J.-F. Liao, X.-D. Wang, L. Zhou, Y. Jiang, D.-B. Kuang. Matter 2020, 3, 892-903.

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