Seed-Crystal-Assisted Space-Confined Growth of FASnI3 Quasi-Single-Crystal Thick Films and Their Photodetection Characteristics

被引：6

作者：

Gao, Weiyin ^{[1
,2
,3
]}

Liu, Xin ^{[1
,2
]}

Jin, Hangfan ^{[1
,2
]}

Li, Wangyue ^{[1
,2
]}

Wang, Xiaobo ^{[1
,2
]}

Huang, Rui ^{[1
,2
]}

Xing, Gang ^{[1
,2
]}

Dong, He ^{[1
,2
]}

Zhou, Yipeng ^{[1
,2
]}

Wu, Zhongbin ^{[1
,2
]}

Ran, Chenxin ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Frontiers Sci Ctr Flexible Elect, Xian Inst Flexible Elect IFE, Xian 710072, Peoples R China

[2] Northwestern Polytech Univ, Xian Inst Biomed Mat & Engn, Xian 710072, Peoples R China

[3] Xian Shiyou Univ, Coll New Energy, Xian 710065, Peoples R China

来源：

ACS ENERGY LETTERS | 2024年 / 9卷 / 10期

基金：

中国博士后科学基金;

关键词：

PEROVSKITES; STRATEGY;

D O I：

10.1021/acsenergylett.4c01596

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sn-based perovskites are ideal eco-friendly candidates as an alternative to Pb-based ones in next-generation optoelectronics. However, a polycrystalline Sn-based perovskite thin film deposited from the spin-coating process suffers from high defect density and poor chemical stability, causing inferior performance of optoelectronic devices. Herein, we report the fabrication of a compact FASnI(3) quasi-single-crystal (QSC) thick film by developing a seed-crystal-assisted space-confined (SSG) strategy. The crystal growth dynamics in the SSG process is identified to be crystal size-dependent Ostwald ripening, and the key parameters are carefully investigated. After optimization, a compact n-type FASnI(3) QSC thick film can be produced with exceptional properties, including thickness of 12 mu m, crystal size of 36.63 +/- 12.24 mu m, defect density of 5.68 x 10(12) cm(-3), and charge mobility of 10.1 cm(2) V-1 s(-1). The corresponding photodetector exhibits self-driven detection ability and detectivity of 10(10) Jones at low bias of 0.1 V. This work opens up a new avenue for developing high-performing Sn-based optoelectronic devices.

引用

页码：5045 / 5055

页数：11

共 55 条

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