The improved photoresponse properties of self-powered NiO/ZnO heterojunction arrays UV photodetectors with designed tunable Fermi level of ZnO
Copyright © 2020 Elsevier Inc. All rights reserved..
Self-powered ultraviolet (UV) photodetectors (PDs) based on ZnO heterojunctions have attracted more attention due to the simple preparation and excellent photoresponse performance without any power supply. The self-powered UV PDs based on NiO nanoflakes/ZnO nanorod arrays (NRs) heterojunctions were fabricated by a low-cost, simple chemical bath deposition (CBD) method. The crystal quality, optical and electronic properties of ZnO NRs is modified by Al3+ ions additions in the precursor solution. The heterojunction devices with ZnO NRs grown in 0.5% Al3+ ions additions precursor solution exhibit a narrow UV spectral selectivity, high photoresponsivity R (85.12 mA/W) and detectivity D* (1.74 × 1012 cm·Hz1/2/W) and a fast response speed (~2 ms) under 378 nm UV light for low intensity irradiance (0.2 mW/cm2) at zero bias. The large built-in electric field of the NiO/ZnO heterojunction with the increased Fermi level of ZnO NRs provide a strong driving force to separate and transfer the photo-generated carriers, decrease the recombination of the carriers and then improve the photoresponse performance of heterojunction devices without external bias.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:577 |
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Enthalten in: |
Journal of colloid and interface science - 577(2020) vom: 01. Okt., Seite 279-289 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Wei, Chengtai [VerfasserIn] |
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Links: |
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Themen: |
Fermi level |
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Anmerkungen: |
Date Revised 03.08.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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doi: |
10.1016/j.jcis.2020.05.077 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM310656680 |
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520 | |a Copyright © 2020 Elsevier Inc. All rights reserved. | ||
520 | |a Self-powered ultraviolet (UV) photodetectors (PDs) based on ZnO heterojunctions have attracted more attention due to the simple preparation and excellent photoresponse performance without any power supply. The self-powered UV PDs based on NiO nanoflakes/ZnO nanorod arrays (NRs) heterojunctions were fabricated by a low-cost, simple chemical bath deposition (CBD) method. The crystal quality, optical and electronic properties of ZnO NRs is modified by Al3+ ions additions in the precursor solution. The heterojunction devices with ZnO NRs grown in 0.5% Al3+ ions additions precursor solution exhibit a narrow UV spectral selectivity, high photoresponsivity R (85.12 mA/W) and detectivity D* (1.74 × 1012 cm·Hz1/2/W) and a fast response speed (~2 ms) under 378 nm UV light for low intensity irradiance (0.2 mW/cm2) at zero bias. The large built-in electric field of the NiO/ZnO heterojunction with the increased Fermi level of ZnO NRs provide a strong driving force to separate and transfer the photo-generated carriers, decrease the recombination of the carriers and then improve the photoresponse performance of heterojunction devices without external bias | ||
650 | 4 | |a Journal Article | |
650 | 4 | |a Fermi level | |
650 | 4 | |a Heterojunctions | |
650 | 4 | |a Self-powered photodetectors | |
650 | 4 | |a Surface defect states | |
700 | 1 | |a Xu, Jianping |e verfasserin |4 aut | |
700 | 1 | |a Shi, Shaobo |e verfasserin |4 aut | |
700 | 1 | |a Bu, Yichen |e verfasserin |4 aut | |
700 | 1 | |a Cao, Rui |e verfasserin |4 aut | |
700 | 1 | |a Chen, Jing |e verfasserin |4 aut | |
700 | 1 | |a Xiang, Jinjie |e verfasserin |4 aut | |
700 | 1 | |a Zhang, Xiaosong |e verfasserin |4 aut | |
700 | 1 | |a Li, Lan |e verfasserin |4 aut | |
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