High responsivity photodetector based on MEH-PPV/CsPbBr3heterojunction

Zhendong Fu; Fuguo Wang; Jiangnan Liu; Wenbao Sun; Haiting Zhang; Xiaoxian Song; Jianquan Yao

doi:10.1088/1361-6528/ad4654

High responsivity photodetector based on MEH-PPV/CsPbBr₃heterojunction

Nanotechnology. 2024 May 20;35(32). doi: 10.1088/1361-6528/ad4654.

Authors

Zhendong Fu¹, Fuguo Wang^{2

3}, Jiangnan Liu¹, Wenbao Sun¹, Haiting Zhang^{2

3}, Xiaoxian Song^{2

3

4}, Jianquan Yao^{2

3

4}

Affiliations

¹ Center of Intelligent Opto-electric Sensors, Tianjin Jinhang Technical Physics Institute, Tianjin, 300308, People's Republic of China.
² School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, People's Republic of China.
³ Institute of Micro-nano Optoelectronics and Terahertz Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, People's Republic of China.
⁴ School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China.

PMID: 38697049
DOI: 10.1088/1361-6528/ad4654

Abstract

Perovskite quantum dots (QDs) and organic materials have great research potential in the field of optoelectronic devices. In this paper, MEH-PPV/CsPbBr₃heterojunction photodetectors (PDs) are prepared by spin coating method based on the good photoelectric properties of CsPbBr₃perovskite QDs and MEH-PPV. The MEH-PPV/CsPbBr₃heterojunction improves the energy level arrangement, and CsPbBr₃QDs can passivate the surface defects of MEH-PPV films to achieve effective charge separation and transfer, thus inhibiting the dark current and improving the photoelectric performance of the device. Under 532 nm laser irradiation, the responsivity (R) of MEH-PPV/CsPbBr₃heterojunction PD is 11.98 A W^-1, the specific detectivity (D*) is 6.98 × 10¹¹Jones, and the response time is 15/16 ms. This work provides experience for the study of perovskite QDs and organic materials heterojunction optoelectronic devices.

Keywords: heterojunction; high responsivity; organic polymers; perovskite QDs; photodetector.