Water engineering in lead free CsCu2I3 perovskite for high performance planar heterojunction photodetector applications

被引：15

作者：

Bai, Kailei ^{[1
]}

Fan, Zihao ^{[1
]}

Zhao, Guocheng ^{[1
,3
]}

He, Xiaoyue ^{[3
]}

Zhu, Zibo ^{[1
]}

Pan, Shusheng ^{[1
,2
]}

Ge, Jun ^{[1
,2
]}

He, Chenguang ^{[4
]}

机构：

[1] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China

[2] Guangzhou Univ, Huangpu Res & Grad Sch, Res Ctr Adv Informat Mat CAIM, Guangzhou 510006, Peoples R China

[3] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[4] Guangdong Acad Sci, Inst Semicond, Guangzhou 510650, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Water engineering; Lead free perovskites; UV photodetector; LIGHT-EMITTING-DIODES; THIN-FILM;

D O I：

10.1016/j.ceramint.2022.09.162

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, lead-free single crystal perovskite CsCu2I3 was synthesized by anti-solvent evaporation-assisted crystallization. Then CsCu2I3/CuI planar heterojunction was prepared by water treatment to form nanostructured CuI film on the surface of CsCu2I3 single crystal. Due to the enhanced light trapping by the porous CuI surface layer, the photodetector performances are significantly improved. The CsCu2I3/CuI lateral photodetector exhibits high sensitivity from violet to deep ultraviolet region, with the typical responsivity of 1.20, 0.59 and 0.84 A/W for 420 nm, 360 nm and 250 nm at 5 V bias, respectively. The typical response times are 119 ms (rise) and 287 ms (fall). Our findings provide a new perspective to engineer the photoelectric properties of inorganic perov-skites through surface modification by water treatment.

引用

页码：1970 / 1979

页数：10

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