Solution-processed upconversion photodetectors based on quantum dots
文献类型：期刊论文
| 作者 | Zhou, Wenjia2; Shang, Yuequn2; de Arquer, F. Pelayo Garcia1; Xu, Kaimin2; Wang, Ruili2; Luo, Shaobo2; Xiao, Xiongbin2; Zhou, Xiaoyu3; Huang, Ruimin3 ; Sargent, Edward H.1
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| 刊名 | NATURE ELECTRONICS
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| 出版日期 | 2020-03-30 |
| 页码 | 10 |
| ISSN号 | 2520-1131 |
| DOI | 10.1038/s41928-020-0388-x |
| 通讯作者 | Ning, Zhijun(ningzhj@shanghaitech.edu.cn) |
| 英文摘要 | By embedding silver nanoparticles in the electron transport layer, solution-processed quantum-dot-based photodetectors with a high photon-to-electron conversion efficiency of 6.5% and a low turn-on voltage of 2.5 V can be created for use in infrared imaging applications. Upconversion photodetectors convert photons from the infrared to the visible light spectrum and are of use in applications such as infrared detection and imaging. High-performance upconversion devices are, however, typically based on vacuum-deposited materials, which are expensive and require high operating voltages, which limits their implementation in flexible systems. Here we report solution-processed optical upconversion photodetectors with a high photon-to-photon conversion efficiency of 6.5% and a low turn-on voltage of 2.5 V. Our devices consist of a colloidal lead sulfide quantum dot layer for harvesting infrared light that is monolithically coupled to a cadmium selenide/zinc selenide quantum dot layer for visible-light emission. We optimized the charge-extraction layers in these devices by incorporating silver nanoparticles into the electron transport layers to enable carrier tunnelling. Our photodetectors exhibit a low dark current, high detectivity (6.4 x 10(12) Jones) and millisecond response time, and are compatible with flexible substrates. We also show that the devices can be used for in vitro bioimaging. |
| WOS关键词 | LIGHT-EMITTING-DIODES ; CONVERTER ; EFFICIENCY ; DEVICES |
| 资助项目 | National Key Research and Development Program of China[2016YFA0204000] ; National Natural Science Foundation of China[61935016] ; National Natural Science Foundation of China[U1632118] ; National Natural Science Foundation of China[21571129] ; Shanghai Tech start-up funding ; 1000 Young Talent program ; Science and Technology Commission of Shanghai Municipality[16JC1402100] ; Science and Technology Commission of Shanghai Municipality[16520720700] ; Analytical Instrumentation Center, SPST, ShanghaiTech University[SPST-AIC10112914] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000522379500001 |
| 出版者 | NATURE PUBLISHING GROUP |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/280901]  |
| 专题 | 中国科学院上海药物研究所 |
| 通讯作者 | Ning, Zhijun |
| 作者单位 | 1.Univ Toronto, Dept Elect & Comp Engn, Toronto, ON, Canada 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Wenjia,Shang, Yuequn,de Arquer, F. Pelayo Garcia,et al. Solution-processed upconversion photodetectors based on quantum dots[J]. NATURE ELECTRONICS,2020:10. |
| APA | Zhou, Wenjia.,Shang, Yuequn.,de Arquer, F. Pelayo Garcia.,Xu, Kaimin.,Wang, Ruili.,...&Ning, Zhijun.(2020).Solution-processed upconversion photodetectors based on quantum dots.NATURE ELECTRONICS,10. |
| MLA | Zhou, Wenjia,et al."Solution-processed upconversion photodetectors based on quantum dots".NATURE ELECTRONICS (2020):10. |
入库方式： OAI收割
来源：上海药物研究所
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