Open AccessPhotoresponse properties of p‐type ZnSe nanowire photodetectors
Author(s) -
Li Shanying,
Su Qing,
Zhao Haipeng
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0085
Subject(s) - photodetector , optoelectronics , nanowire , materials science , light intensity , band gap , reproducibility , ray , dark current , optics , physics , chemistry , chromatography
Nanophotodetectors are constructed based on individual p‐type ZnSe nanowires (NWs), and the photoresponse properties are investigated. The nanophotodetectors show high sensitivity and fast response speed to the incident light with a sharp cutoff at 470 nm. The light‐to‐dark currents ratio I light / I dark is approximately two orders of magnitude; photoconduction is 20.5 nS at incident light intensity of 5.11 mWcm −2 . The response characteristics reveal that different energy levels (shallow and deep) in the bandgap and defects on the NW surface play an important role in the recombination. The ZnSe NW photodetector with good reliability and reproducibility will have great potential application in optoelectronic nanodevices.