Highly Sensitive Ultraviolet Photodetectors Fabricated from ZnO Quantum Dots/Carbon Nanodots Hybrid Films

Ultraviolet photodetectors have been fabricated from ZnO quantum dots/carbon nanodots hybrid films and the introduction of carbon nanodots improves the performance of the photodetectors greatly. The photodetectors can be used to detect very weak ultraviolet signals (as low as 12 nW/cm 2 ). The detec...

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Bibliographic Details
Published inScientific reports Vol. 4; no. 1; p. 7469
Main Authors Guo, Deng-Yang, Shan, Chong-Xin, Qu, Song-Nan, Shen, De-Zhen
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 12.12.2014
Nature Publishing Group
Subjects
639/301/1005/1007
639/624/399/1017
Carbon
Humanities and Social Sciences
multidisciplinary
Quantum dots
Science
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Summary:Ultraviolet photodetectors have been fabricated from ZnO quantum dots/carbon nanodots hybrid films and the introduction of carbon nanodots improves the performance of the photodetectors greatly. The photodetectors can be used to detect very weak ultraviolet signals (as low as 12 nW/cm 2 ). The detectivity and noise equivalent power of the photodetector can reach 3.1 × 10 17  cmHz 1/2 /W and 7.8 × 10 −20  W, respectively, both of which are the best values ever reported for ZnO-based photodetectors. The mechanism for the high sensitivity of the photodetectors has been attributed to the enhanced carrier-separation at the ZnO/C interface.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep07469