Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors
Graphene has unique and outstanding properties that make it a promising material for many applications. It has triggered considerable research in fields including solar cells, photodetectors, electrodes, and supercapacitors. Despite the favorable characteristics of devices using graphene have been w...
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sg-ntu-dr.10356-1456742021-01-04T07:41:39Z Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors Shih, Yi-Hsiang Chen, You-Ling Tan, Jui-Hsin Chang, Sheng Hsiung Uen, Wu-Yih Chen, Shih-Lun Lin, Ming-Yi Chen, Yu-Cheng Tu, Wei-Chen School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Large Area Low Power Graphene has unique and outstanding properties that make it a promising material for many applications. It has triggered considerable research in fields including solar cells, photodetectors, electrodes, and supercapacitors. Despite the favorable characteristics of devices using graphene have been widely explored, issues such as low absorbance, complex processing, and limited device size remain. Hence, we present large-area CdSe quantum dots (QDs)/reduced graphene oxide (rGO) films and corresponding photodetectors through a cost-effective and simple spin-coating method. As light turns on, CdSe QDs are excited and generate excess electron-hole pairs, leading to a significantly increased on/off current ratio of 2195 at a low bias voltage of -1 V, compared to that of photodetectors without CdSe QDs. Decorating the rGO film with CdSe QDs enables the wavefunction modulation and enhances the light harvesting. Our proposed high-performance photodetector can be operated at a low voltage, which is beneficial for applications in various green and low-power consumption devices. Published version 2021-01-04T07:41:39Z 2021-01-04T07:41:39Z 2020 Journal Article Shih, Y.-H., Chen, Y.-L., Tan, J.-H., Chang, S. H., Uen, W.-Y., Chen, S.-L., . . . Tu, W.-C. (2020). Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors. IEEE Access, 8, 95855-95863. doi:10.1109/ACCESS.2020.2995676 2169-3536 https://hdl.handle.net/10356/145674 10.1109/ACCESS.2020.2995676 8 95855 95863 en IEEE Access © 2020 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given. application/pdf |
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Engineering::Electrical and electronic engineering Large Area Low Power Shih, Yi-Hsiang Chen, You-Ling Tan, Jui-Hsin Chang, Sheng Hsiung Uen, Wu-Yih Chen, Shih-Lun Lin, Ming-Yi Chen, Yu-Cheng Tu, Wei-Chen Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
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Graphene has unique and outstanding properties that make it a promising material for many applications. It has triggered considerable research in fields including solar cells, photodetectors, electrodes, and supercapacitors. Despite the favorable characteristics of devices using graphene have been widely explored, issues such as low absorbance, complex processing, and limited device size remain. Hence, we present large-area CdSe quantum dots (QDs)/reduced graphene oxide (rGO) films and corresponding photodetectors through a cost-effective and simple spin-coating method. As light turns on, CdSe QDs are excited and generate excess electron-hole pairs, leading to a significantly increased on/off current ratio of 2195 at a low bias voltage of -1 V, compared to that of photodetectors without CdSe QDs. Decorating the rGO film with CdSe QDs enables the wavefunction modulation and enhances the light harvesting. Our proposed high-performance photodetector can be operated at a low voltage, which is beneficial for applications in various green and low-power consumption devices. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Shih, Yi-Hsiang Chen, You-Ling Tan, Jui-Hsin Chang, Sheng Hsiung Uen, Wu-Yih Chen, Shih-Lun Lin, Ming-Yi Chen, Yu-Cheng Tu, Wei-Chen |
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Article |
author |
Shih, Yi-Hsiang Chen, You-Ling Tan, Jui-Hsin Chang, Sheng Hsiung Uen, Wu-Yih Chen, Shih-Lun Lin, Ming-Yi Chen, Yu-Cheng Tu, Wei-Chen |
author_sort |
Shih, Yi-Hsiang |
title |
Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
title_short |
Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
title_full |
Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
title_fullStr |
Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
title_full_unstemmed |
Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors |
title_sort |
low-power, large-area and high-performance cdse quantum dots/reduced graphene oxide photodetectors |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/145674 |
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1688665362427543552 |