Photodetectors Based on A 2D/3D Hybrid Tin Perovskite/SnO2Heterojunction

被引：0

作者：

Su Z.-S. ^{[1
]}

Zhang L. ^{[1
]}

Hu Y. ^{[1
]}

Yao G.-P. ^{[1
]}

Wang L.-D. ^{[2
]}

机构：

[1] Fujian Key Laboratory for Advanced Micro-nano Photonics Technology and Devices, College of Physics and Information Engineering, Quanzhou Normal University, Quanzhou

[2] College of Chemical Engineering and Material, Quanzhou Normal University, Quanzhou

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2022年 / 43卷 / 07期

关键词：

2D/3D hybrid structure; heterojunction; photodetector; Sn perovskite; SnO[!sub]2[!/sub;

D O I：

10.37188/CJL.20220107

中图分类号：

学科分类号：

摘要：

Planar structure photodetector based on a 2D/3D hybrid perovskite （PEA）0.15FA0.85SnI3/SnO2 heterojunction was constructed. It is found that the inserted SnO2 layer can manipulate the crystal growth process of the （PEA）0.15FA0.85SnI3 film， benefiting to form a dense and continued film. Under illumination of a 520 nm monochromatic light， the device shows a high response of 3.19×105 A/W， corresponding to a detectivity of 6.39×1015 Jones. While under illumination of an 808 nm monochromatic light， the device also shows a response of 1.70×104 A/W and a detectivity of 7.28×1013 Jones. These performances are dramatically higher than that device based on a simple （PEA）0.15FA0.85SnI3 film.On the one hand， the improvements are attributed to the improved morphology of the perovskite film， which increases the absorption efficiency and charge carrier collection efficiency of the device；on the other hand， the formation of a p-n junction between （PEA）0.15FA0.85SnI3 and SnO2 effectively increases the dissociation efficiency of the photogenerated electron-hole pairs in the perovskite and decreases the recombination probability of the electrons and holes. Moreover， the special electronic structure at the （PEA）0.15FA0.85SnI3/SnO2 interface may also trigger the device revealing a photoconduction gain. © 2022 Chines Academy of Sciences. All rights reserved.

引用

页码：1121 / 1129

页数：8

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