Solution-processed, flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot heterostructures

Jinming Hu ¹Shengyi Yang ²Zhenheng Zhang ¹Hailong Li ¹Chandrasekar Perumal Veeramalai ¹Muhammad Sulaman ³Muhammad Imran Saleem ¹Yi Tang ⁴Yurong Jiang ⁴Libin Tang ⁵Bingsuo Zou⁶

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作者信息

1. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing, 100081, China;Key Laboratory of Advanced Optoelectronic Quantum Design and Measurement, Ministry of Education, Beijing Institute of Technology, Beijing, 100081,China
2. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing, 100081, China;Key Laboratory of Advanced Optoelectronic Quantum Design and Measurement, Ministry of Education, Beijing Institute of Technology, Beijing, 100081,China;Kunming Institute of Physics, Kunming, 650223, China
3. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing, 100081, China;Key Laboratory of Advanced Optoelectronic Quantum Design and Measurement, Ministry of Education, Beijing Institute of Technology, Beijing, 100081,China;Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
4. Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
5. Kunming Institute of Physics, Kunming, 650223, China
6. MOE Key Lab of New Processing Technology for Nonferrous Metals and Materials and Guangxi Key Lab of Processing for Nonferrous Metals and Featured Materials, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
折叠

Abstract

Due to their promising applications in foldable displays,optical communication equipment and environmental monitoring systems,flexible and broadband optoelectronic devices have gained extensive attention in recent years.Here,a flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot (QD) heterostructures is firstly presented.The integrated QD heterostructures possess consecutive detection range from ultraviolet (UV) to long-wavelength infrared (LW-IR) regions with efficient light absorption and chemical stability,in comparison with the pristine PbSe QDs.Systematic material characterizations reveal the improved exciton dissociation,carrier transport and carrier lifetime of the QD heterostructures.Flexible photodetector Ag/CsPbBr3/PbSe/Ag demonstrate a high responsivity of 7.17 A/W with a specific detectivity of 8.97 × 1012 Jones under 25 μW/cm2 365 nm illumination at 5 V.Furthermore,it could maintain 91.2 ％ (or 94.9 ％) of its initial performance even after bending for thousands of times (or exposing in ambient air for 4 weeks).More importantly,its response time is shortened more than three orders of magnitude as that of pristine PbSe QDs-based photodetectors.Therefore,it provides a feasible and promising method for the next-generation high-performance broadband photodetectors via constructing heterostructures of various QDs.

Key words

Quantum dots/Broadband detection/Flexible photodetectors/Fast photoresponse speed/Heterostructures

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基金项目

Project of State Key Laboratory of Transducer Technology(SKT1404)

中央高校基本科研业务费专项(2020CX02002)

中央高校基本科研业务费专项(BITBLR2020013)

Key R&D Projects of the Ministry of Science and Technology(SQ2019YFB220038)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量52

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