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High-Performance Near-Infrared Photodetector Based on PbS Colloidal Quantum Dots/ZnO-Nanowires Hybrid Nanostructures

Hefu Zhong, Libin Tang, Pin Tian, Lijing Yu, Wenbin Zuo, Vincent Teng Orcid Logo

Sensors, Volume: 23, Issue: 4, Start page: 2254

Swansea University Author: Vincent Teng Orcid Logo

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DOI (Published version): 10.3390/s23042254

Abstract

Quantum dots have found significant applications in photoelectric detectors due to their unique electronic and optical properties, such as tunable bandgap. Recently, colloidal quantum dots (CQDs) have attracted much interest because of the ease of controlling the dot size and low production cost. In...

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Published in: Sensors
ISSN: 1424-8220
Published: MDPI AG 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa62679
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Abstract: Quantum dots have found significant applications in photoelectric detectors due to their unique electronic and optical properties, such as tunable bandgap. Recently, colloidal quantum dots (CQDs) have attracted much interest because of the ease of controlling the dot size and low production cost. In this paper, a high-performance ZnO/PbS heterojunction photodetector was fabricated by spin-coating PbS CQDs onto the surface of a hydrothermally grown vertical array of ZnO nanowires (NWs) on an indium tin oxide (ITO) substrate. Under 940 nm near-infrared light illumination, the device demonstrated a responsivity and detectivity of ~3.9 × 104 A/W and ~9.4 × 1013 Jones, respectively. The excellent performances and low cost of this nanocomposite-based photodetector show that it has the potential for widespread applications ranging from medical diagnosis to environmental monitoring.
Keywords: ZnO NWs, PbS, CQDs, infrared detector
College: Faculty of Science and Engineering
Funders: Yunnan Province Innovation Team Project (2018HC020), National Key Research and Development Program of China (2019YFB2203404)
Issue: 4
Start Page: 2254

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