Document Detail

Self-powered ultrafast broadband photodetector based on p-n heterojunctions of CuO/Si nanowire array.
MedLine Citation:
PMID:  25383662     Owner:  NLM     Status:  Publisher    
A new self-powered broadband photodetector was fabricated by coating an n-silicon nanowire (n-Si NW) array with a layer of p-cupric oxide (CuO) nanoflakes through a new simple solution synthesis method. The p-n heterojunction shows excellent rectification characteristics in the dark and distinctive photovoltaic behavior under broadband light illumination. The photoresponse of the detector at zero bias voltage shows that this self-powered photodetector is highly sensitive to visible and near-infrared light illuminations, with excellent stability and reproducibility. Ultrafast response rise and recovery times of 60 µs and 80 µs, respectively, are shown by the CuO based nano-photodetector. In addition, the broadband photodetector can also provide a rapid binary response, with current changing from positive to negative upon illumination under a small bias. The binary response arises from the photovoltaic behavior and the low turn-on voltage of the CuO/Si NW device. These properties make the CuO/Si NW broadband photodetector suitable for applications that require high response speeds and self-sufficient functionality.
Qingshui Hong; Yang Cao; Jia Xu; Huimin Lu; Junhui He; Jia-Lin Sun
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-10
Journal Detail:
Title:  ACS applied materials & interfaces     Volume:  -     ISSN:  1944-8252     ISO Abbreviation:  ACS Appl Mater Interfaces     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-10     Completed Date:  -     Revised Date:  2014-11-11    
Medline Journal Info:
Nlm Unique ID:  101504991     Medline TA:  ACS Appl Mater Interfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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