In Situ Low-Temperature Growth and Superior Luminescent Property of Well-Aligned, High-Quality Cubic CsPbBr3 Micrometer-Scale Single Crystal Arrays on Transparent Conductive Substrates

Sijia Li; Yongzhi She; Huaiyi Ding; Jinlong Yang; Jing Peng; Min Wu; Xiangdong Kong; Dengbao Han; Nan Pan; Xiaoping Wang

doi:10.1021/acs.jpclett.1c03984

In Situ Low-Temperature Growth and Superior Luminescent Property of Well-Aligned, High-Quality Cubic CsPbBr₃ Micrometer-Scale Single Crystal Arrays on Transparent Conductive Substrates

J Phys Chem Lett. 2022 Feb 3;13(4):1114-1122. doi: 10.1021/acs.jpclett.1c03984. Epub 2022 Jan 26.

Authors

Sijia Li¹, Yongzhi She², Huaiyi Ding³, Jinlong Yang², Jing Peng¹, Min Wu², Xiangdong Kong¹, Dengbao Han⁴, Nan Pan^{1

5

6}, Xiaoping Wang^{1

2

5

6}

Affiliations

¹ Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
² Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
³ Department of Physics, Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering, Yunnan University, Kunming, Yunnan 650091, P. R. China.
⁴ Hefei Innovation Research Institute, Beihang University, Hefei, Anhui 230013, P. R. China.
⁵ Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
⁶ Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.

PMID: 35080395
DOI: 10.1021/acs.jpclett.1c03984

Abstract

Direct assembly of high-quality single-crystal perovskite microarrays on transparent conductive substrates and carrier injection layers is vital to realize high-performance optoelectronic devices. Although cubic-phase CsPbBr₃ is considered to have a higher structural and optical quality than the orthorhombic one, obtaining a well-aligned assembly directly on the aforementioned substrates is still challenging. Here we developed a solvent-assisted crystallization strategy with the assistance of surface modifiers, through which the in situ low-temperature growth of well-aligned cubic single-crystal CsPbBr₃ microarray with a preferential out-of-plane [100] orientation is achieved for the first time on commercial transparent conductive substrates. As compared with the control orthorhombic samples, the cubic CsPbBr₃ single crystals possess superior properties including a higher photoluminescence internal quantum efficiency, fewer defect states, a weaker scattering by phonons, and an appearance of lasing. The results presented here can pave the way for future design and applications of optoelectronic devices based on perovskite microarrays.