Directional Charge Carrier Management Enabled by Orderly Arranged Perovskite Heterodomain with Defined Size for Self-Powered Photodetectors

被引：0

作者：

Bao, Yaqi ^{[1
]}

Li, Maoxin ^{[1
]}

Jin, Hangfan ^{[1
]}

Wang, Xiaobo ^{[1
]}

Zeng, Jie ^{[2
,3
]}

Feng, Yang ^{[1
]}

Hui, Wei ^{[1
]}

Wang, Dourong ^{[1
]}

Gu, Lei ^{[1
]}

Zhang, Jie ^{[1
]}

Hua, Yikun ^{[1
]}

Wang, Xiao ^{[4
,5
]}

Xu, Baomin ^{[2
,3
]}

Chen, Wei ^{[4
,5
]}

Wu, Zhongbin ^{[1
]}

Mueller-Buschbaum, Peter ^{[6
,7
]}

Song, Lin ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Ningbo Inst, Inst Flexible Elect IFE, Frontiers Sci Ctr Flexible Elect FSCFE, 127 West Youyi Rd, Xian 710072, Peoples R China

[2] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

[3] Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China

[4] Shenzhen Technol Univ, Ctr Intense Laser Applicat Technol, Shenzhen Key Lab Ultraintense Laser & Adv Mat Tech, Shenzhen 518118, Peoples R China

[5] Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China

[6] Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, James Franck Str 1, D-85748 Garching, Germany

[7] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, Lichtenberg Str 1, D-85748 Garching, Germany

来源：

ADVANCED FUNCTIONAL MATERIALS | 2024年 / 34卷 / 44期

关键词：

charge carrier transport channels; heterodomain; perovskite; self-powered photodetectors; DOT SOLAR-CELLS; EFFICIENCY;

D O I：

10.1002/adfm.202404697

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Perovskite planar heterojunction is reported to promote charge-carrier separation at the interface due to the introduced built-in potential, leading to improved charge-carrier harvesting. However, the possible diffusion of charge carriers along the film lateral will increase their travel distance to respective electrodes, resulting in increased recombination probabilities. Constructing independent transport channels for positive and negative charge carriers individually is an efficient way to optimize the transport in the perovskite layer and thereby to achieve enhanced device performance. Here, a solution-based strategy is proposed to fabricate lateral bulk heterojunction (BHJ) by arranging methylammonium-based and formamidinium-based perovskites alternately in an ordered array with controllable domains. The structure of perovskite heterodomain directs charge carrier transport along the film normal and limits in-plane charge carrier diffusion. Moreover, the ordered perovskite array is found to greatly increase light harvesting. Consequently, the self-powered photodetector based on the perovskite heterodomain with a thickness of only 250 nm achieves a specific detectivity exceeding 1 x 1014 Jones for weak light over the whole visible light spectrum. This work provides guidance toward the fabrication of perovskite lateral BHJ using solution processing, meeting the requirements not only for charge-carrier manipulation but also for light management. An orderly arranged perovskite heterodomain is developed as the active layer for self-powered photodetectors. The alternate MAPbI3-FAPbI3 array not only directs charge carrier transport along the film normal and limits in-plane charge carrier diffusion, but also improves light harvesting. The obtained photodetector achieves a specific detectivity exceeding 1 x 1014 Jones for weak light over the whole visible light spectrum without external bias. image

引用

页数：10