PbSe Nanocrystals Produced by Facile Liquid Phase Exfoliation for Efficient UV–Vis Photodetectors

Lingfeng Gao; Rui Wang; Artem V. Kuklin; Han Zhang; Hans Ågren

doi:10.1002/adfm.202010401

journal article·2021-04

PbSe Nanocrystals Produced by Facile Liquid Phase Exfoliation for Efficient UV–Vis Photodetectors

Lingfeng Gao, Rui Wang, Artem V. Kuklin, Han Zhang, Hans Ågren

Advanced Functional Materials· Volume 31· Issue 17

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Abstract

Abstract Lead selenide (PbSe)‐based nanomaterials have been extensively investigated as building blocks for next‐generation optoelectronic devices owing to their unique properties. In this work, PbSe nanocrystals (NCs) have been successfully fabricated by a facile liquid phase exfoliation approach and directly applied as active materials for photo‐electrochemical (PEC)‐type photodetectors (PDs). Taking advantage of broadband absorption and fast carrier dynamics, the PbSe NCs‐based PDs exhibit excellent photo‐current density (11.88 μA cm⁻²), photo‐responsivity (12.37 mA W⁻¹), response/recovery time (0.12/0.13 s), and long‐term cycling stability. The working mechanism of PbSe NCs‐based PDs is explored by density functional theory calculations based on their structural and electronic properties under various conditions. It is anticipated that this contribution paves the way to readily fabricate low‐dimensional PbSe NCs and extend their practical applications in PEC‐type PDs.

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Research context

Nanomaterials Electronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science & Technology Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Micro‐Nano Photonic Information Technology Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ) Shenzhen University Shenzhen 518060 P. R. China

State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano‐optoelectronics School of Physics Peking University Beijing 100871 P. R. China

Department of Physics and Astronomy Uppsala University Uppsala SE‐75120 Sweden

College of Chemistry and Chemical Engineering Henan University Kaifeng Henan 475004 P. R. China

Funding

National Natural Science Foundation of China

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