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...

Full description

Saved in:
Bibliographic Details
Main Authors: 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
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Online Access:https://hdl.handle.net/10356/145674
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-145674
record_format dspace
spelling 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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Large Area
Low Power
spellingShingle 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
description 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.
author2 School of Electrical and Electronic Engineering
author_facet 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
format 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
_version_ 1688665362427543552