Solution-Processed CsPbBr3 Quantum Dots/Organic Semiconductor Planar Heterojunctions for High-Performance Photodetectors

Kaixuan Chen; Xuliang Zhang; Ping-An Chen; Jing Guo; Mai He; Yanqin Chen; Xincan Qiu; Yu Liu; Huajie Chen; Zebing Zeng; Xiao Wang; Jianyu Yuan; Wanli Ma; Lei Liao; Thuc-Quyen Nguyen; Yuanyuan Hu

doi:10.1002/advs.202105856

Solution-Processed CsPbBr₃ Quantum Dots/Organic Semiconductor Planar Heterojunctions for High-Performance Photodetectors

Adv Sci (Weinh). 2022 Apr;9(12):e2105856. doi: 10.1002/advs.202105856. Epub 2022 Mar 1.

Authors

Kaixuan Chen¹, Xuliang Zhang², Ping-An Chen³, Jing Guo³, Mai He³, Yanqin Chen³, Xincan Qiu³, Yu Liu³, Huajie Chen⁴, Zebing Zeng⁵, Xiao Wang³, Jianyu Yuan², Wanli Ma², Lei Liao¹, Thuc-Quyen Nguyen⁶, Yuanyuan Hu^{1

3

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Affiliations

¹ Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and International Science and Technology Innovation Cooperation Base for Advanced Display Technologies of Hunan Province, College of Semiconductors (College of Integrated Circuits), Hunan University, Changsha, 410082, China.
² Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, the Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
³ Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.
⁴ Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China.
⁵ State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
⁶ Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
⁷ Shenzhen Research Institute of Hunan University, Shenzhen, 518063, China.

Abstract

Planar heterojunctions (PHJs) are fundamental building blocks for construction of semiconductor devices. However, fabricating PHJs with solution-processable semiconductors such as organic semiconductors (OSCs) is a challenge. Herein, utilizing the orthogonal solubility and good wettability between CsPbBr₃ perovskite quantum dots (PQDs) and OSCs, fabrication of solution-processed PQD/OSC PHJs are reported. The phototransistors based on bilayer PQD/PDVT-10 PHJs show responsivity up to 1.64 × 10⁴ A W^-1 , specific detectivity of 3.17 × 10¹² Jones, and photosensitivity of 5.33 × 10⁶ when illuminated by 450 nm light. Such high photodetection performance is attributed to efficient charge dissociation and transport, as well as the photogating effect in the PHJs. Furthermore, the tri-layer PDVT-10/PQD/Y6 PHJs are used to construct photodiodes working in self-powered mode, which exhibit broad range photoresponse from ultraviolet to near-infrared, with responsivity approaching 10^-1 A W^-1 and detectivity over 10⁶ Jones. These results present a convenient and scalable production processes for solution-processed PHJs and show their great potential for optoelectronic applications.

Keywords: CsPbBr3 quantum dots; organic semiconductors; photodetectors; planar heterojunctions.

Abstract

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