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

被引：36

作者：

Chen, Yuan ^{[1
,2
,3
]}

Zeng, Haibo ^{[3
]}

Ma, Peipei ^{[1
,2
]}

Chen, Gaoyuan ^{[1
,2
]}

Jian, Jie ^{[4
]}

Sun, Xing ^{[4
]}

Li, Xiaoming ^{[3
]}

Wang, Haiyan ^{[4
]}

Yin, Wanjian ^{[1
,2
]}

Jia, Quanxi ^{[5
]}

Zou, Guifu ^{[1
,2
]}

机构：

[1] Soochow Univ, Coll Energy, Soochow Inst Energy & Mat Innovat, Suzhou 215123, Peoples R China

[2] Soochow Univ, Key Lab Adv Carbon Mat & Wearable Energy Technol, Suzhou 215123, Peoples R China

[3] Nanjing Univ Sci & Technol, Coll Mat Sci & Engn, MIIT Key Lab Adv Display Mat & Devices, Nanjing 210094, Peoples R China

[4] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[5] Univ Buffalo State Univ New York, Dept Mat Design & Innovat, Buffalo, NY 14260 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 05期

关键词：

CsPbBr3; freestanding anisotropic growth; halide perovskite; single crystal film; LIGHT-EMITTING-DIODES; SOLAR-CELLS; NANOCRYSTALS; FABRICATION; DEPOSITION; QUALITY; BINDING; SURFACE; SPEED; BR;

D O I：

10.1002/anie.202011853

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 (psi=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.

引用

页码：2629 / 2636

页数：8

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