Quantum Dots-Facilitated Printing of ZnO Nanostructure Photodetectors with Improved Performance

Brent Cook; Qingfeng Liu; Maogang Gong; Dan Ewing; Matthew Casper; Alex Stramel; Judy Wu

doi:10.1021/acsami.7b05324

Quantum Dots-Facilitated Printing of ZnO Nanostructure Photodetectors with Improved Performance

Brent Cook, Qingfeng Liu, Maogang Gong, Dan Ewing, Matthew Casper, Alex Stramel, Judy Wu

科研成果: 期刊稿件 › 文章 › 同行评审

17 引用（Scopus）

摘要

A nanocomposite ink composed of zinc oxide precursor (ZnOPr) and crystalline ZnO quantum dots (ZnOPrQDs) has been explored for printing high-performance ultraviolet (UV) photodetectors. The performance of the devices has been compared with their counterparts' printed from ZnOPr ink without ZnO QDs. Remarkably, higher UV photoresponsivity of 383.6 A/W and the on/off ratio of 2470 are observed in the former, which are significantly better than 14.7 A/W and 949 in the latter. The improved performance is attributed to the increased viscosity in the nanocomposite ink to enable a nanoporous structure with improved crystallinity and surface-to-volume ratio. This is key to enhanced surface electron-depletion effect for higher UV responsivity and on/off ratio. In addition, the QD-assisted printing provides a simple and robust method for printing high-performance optoelectronics and sensors.

源语言	英语
页（从-至）	23189-23194
页数	6
期刊	ACS Applied Materials and Interfaces
卷	9
期	27
DOI	https://doi.org/10.1021/acsami.7b05324
出版状态	已出版 - 12 7月 2017
已对外发布	是

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title = "Quantum Dots-Facilitated Printing of ZnO Nanostructure Photodetectors with Improved Performance",

abstract = "A nanocomposite ink composed of zinc oxide precursor (ZnOPr) and crystalline ZnO quantum dots (ZnOPrQDs) has been explored for printing high-performance ultraviolet (UV) photodetectors. The performance of the devices has been compared with their counterparts' printed from ZnOPr ink without ZnO QDs. Remarkably, higher UV photoresponsivity of 383.6 A/W and the on/off ratio of 2470 are observed in the former, which are significantly better than 14.7 A/W and 949 in the latter. The improved performance is attributed to the increased viscosity in the nanocomposite ink to enable a nanoporous structure with improved crystallinity and surface-to-volume ratio. This is key to enhanced surface electron-depletion effect for higher UV responsivity and on/off ratio. In addition, the QD-assisted printing provides a simple and robust method for printing high-performance optoelectronics and sensors.",

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AU - Liu, Qingfeng

AU - Gong, Maogang

AU - Ewing, Dan

AU - Casper, Matthew

AU - Stramel, Alex

AU - Wu, Judy

PY - 2017/7/12

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N2 - A nanocomposite ink composed of zinc oxide precursor (ZnOPr) and crystalline ZnO quantum dots (ZnOPrQDs) has been explored for printing high-performance ultraviolet (UV) photodetectors. The performance of the devices has been compared with their counterparts' printed from ZnOPr ink without ZnO QDs. Remarkably, higher UV photoresponsivity of 383.6 A/W and the on/off ratio of 2470 are observed in the former, which are significantly better than 14.7 A/W and 949 in the latter. The improved performance is attributed to the increased viscosity in the nanocomposite ink to enable a nanoporous structure with improved crystallinity and surface-to-volume ratio. This is key to enhanced surface electron-depletion effect for higher UV responsivity and on/off ratio. In addition, the QD-assisted printing provides a simple and robust method for printing high-performance optoelectronics and sensors.

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Quantum Dots-Facilitated Printing of ZnO Nanostructure Photodetectors with Improved Performance

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