Overcoming the Anisotropic Growth Limitations of Free-Standing Single-Crystal Halide Perovskite Films

Yuan Chen; Haibo Zeng; Peipei Ma; Gaoyuan Chen; Jie Jian; Xing Sun; Xiaoming Li; Haiyan Wang; Wanjian Yin; Quanxi Jia; Guifu Zou

doi:10.1002/anie.202011853

Overcoming the Anisotropic Growth Limitations of Free-Standing Single-Crystal Halide Perovskite Films

Angew Chem Int Ed Engl. 2021 Feb 1;60(5):2629-2636. doi: 10.1002/anie.202011853. Epub 2020 Dec 1.

Authors

Yuan Chen^{1

2}, Haibo Zeng², Peipei Ma¹, Gaoyuan Chen¹, Jie Jian³, Xing Sun³, Xiaoming Li², Haiyan Wang³, Wanjian Yin¹, Quanxi Jia⁴, Guifu Zou¹

Affiliations

¹ College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215123, China.
² MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
³ School of Material Engineering, Purdue University, West Lafayette, IN, 47907, USA.
⁴ Department of Materials Design and Innovation, University of Buffalo, The State University of New York, Buffalo, NY, 14260, USA.

PMID: 33047467
DOI: 10.1002/anie.202011853

Abstract

It is extremely challenging to grow single-crystal halide perovskite films (SCHPFs) with not only desired transport properties but also large lateral size with much thinner thickness. Here, we report the growth of freestanding single crystal CsPbBr₃ SCHPFs with thickness less than 100 nm and a lateral size close to centimeter for the first time. A new model for growth kinetics (Ψ=Aexp[-(E_A -E_s )/(k_B T)]) is proposed to address the surface energy and temperature effect on the growth rate of ultrathin CsPbBr₃ single-crystal film. The experimental results and DFT calculations both demonstrated that the surfactant plays a critical role in modifying the surface energy and achieving anisotropic growth. This work opens new opportunities for high-quality SCHPFs with large lateral size and controllable thickness that may find wide applications for optoelectronic devices.

Keywords: CsPbBr3; freestanding anisotropic growth; halide perovskite; single crystal film.

Abstract

Grants and funding