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Title: Low-power, large-area and high-performance CdSe quantum dots/reduced graphene oxide photodetectors
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
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: 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
Journal: IEEE Access
Abstract: 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.
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2020.2995676
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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