Highly sensitive ultraviolet photodetectors fabricated from ZnO quantum dots/carbon nanodots hybrid films

Deng-Yang Guo; Chong-Xin Shan; Song-Nan Qu; De-Zhen Shen

doi:10.1038/srep07469

Highly sensitive ultraviolet photodetectors fabricated from ZnO quantum dots/carbon nanodots hybrid films

Sci Rep. 2014 Dec 12:4:7469. doi: 10.1038/srep07469.

Authors

Deng-Yang Guo¹, Chong-Xin Shan², Song-Nan Qu², De-Zhen Shen²

Affiliations

¹ 1] State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China [2] University of Chinese Academy of Sciences, Beijing 10049, China.
² State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't