Performance enhancement of a hydrothermally grown ZnO-based ultraviolet photodetector using substrate transfer and pyramid-like surface texture

Ying Chi Hung, Shui Jinn Wang, Rong Ming Ko, Sheng Yi Wang, Bing Cheng You, Hsiang Yi Chen, Chun Kai Liao, Sheng Tsang Hsiao

研究成果: Article

摘要

A comparative study of the performance of lateral- and vertical-structured UV photodetectors (PDs) based on a hydrothermally grown (HTG) n-ZnO/sputtered p-CuO heterojunction (HJ) is presented. After substrate transfer (ST) conducted using a sonicating bath process, the vertical-structured UV PD showed a fast response and a 310-fold improvement in light responsivity compared with that of the lateral-structured UV PD under UV illumination (365 nm at 3 mW cm-2) at a reverse bias of -1 V. This improvement is attributed to the much shorter conduction path and lake of a seed layer for the vertical structure. With further surface chemical etching of the HTG n-ZnO layer after ST, a pyramid-like surface texture formed and a significantly enhanced UV light response (as high as 943-fold higher) was obtained. The increase in photo-responsivity is due to the removal of the high defect density initial ZnO growth layer and reduced light reflection.

原文English
文章編號SBBG19
期刊Japanese Journal of Applied Physics
58
發行號SB
DOIs
出版狀態Published - 2019 一月 1

指紋

Photodetectors
pyramids
photometers
textures
Textures
augmentation
Substrates
Light reflection
Defect density
lakes
Ultraviolet radiation
Lakes
Seed
Heterojunctions
heterojunctions
seeds
baths
Etching
Lighting
illumination

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

引用此文

Hung, Ying Chi ; Wang, Shui Jinn ; Ko, Rong Ming ; Wang, Sheng Yi ; You, Bing Cheng ; Chen, Hsiang Yi ; Liao, Chun Kai ; Hsiao, Sheng Tsang. / Performance enhancement of a hydrothermally grown ZnO-based ultraviolet photodetector using substrate transfer and pyramid-like surface texture. 於: Japanese Journal of Applied Physics. 2019 ; 卷 58, 編號 SB.
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abstract = "A comparative study of the performance of lateral- and vertical-structured UV photodetectors (PDs) based on a hydrothermally grown (HTG) n-ZnO/sputtered p-CuO heterojunction (HJ) is presented. After substrate transfer (ST) conducted using a sonicating bath process, the vertical-structured UV PD showed a fast response and a 310-fold improvement in light responsivity compared with that of the lateral-structured UV PD under UV illumination (365 nm at 3 mW cm-2) at a reverse bias of -1 V. This improvement is attributed to the much shorter conduction path and lake of a seed layer for the vertical structure. With further surface chemical etching of the HTG n-ZnO layer after ST, a pyramid-like surface texture formed and a significantly enhanced UV light response (as high as 943-fold higher) was obtained. The increase in photo-responsivity is due to the removal of the high defect density initial ZnO growth layer and reduced light reflection.",
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Performance enhancement of a hydrothermally grown ZnO-based ultraviolet photodetector using substrate transfer and pyramid-like surface texture. / Hung, Ying Chi; Wang, Shui Jinn; Ko, Rong Ming; Wang, Sheng Yi; You, Bing Cheng; Chen, Hsiang Yi; Liao, Chun Kai; Hsiao, Sheng Tsang.

於: Japanese Journal of Applied Physics, 卷 58, 編號 SB, SBBG19, 01.01.2019.

研究成果: Article

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AU - Hung, Ying Chi

AU - Wang, Shui Jinn

AU - Ko, Rong Ming

AU - Wang, Sheng Yi

AU - You, Bing Cheng

AU - Chen, Hsiang Yi

AU - Liao, Chun Kai

AU - Hsiao, Sheng Tsang

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