Journal
NANOTECHNOLOGY
Volume 31, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab53b3
Keywords
flexible photodetector; broadband photoresponse; molecular beam epitaxy; tellurium; piezoelectric effect
Funding
- National Nature Science Foundation of China [61273310, 11304399, 11274402]
- Nature Science Foundation of Guangdong Province [2015A030313121, 2016A030310234, S2012020011003]
- Fundamental Research Funds for Central Universities [17lgpy02]
Ask authors/readers for more resources
Flexible photodetector shows great potential applications in intelligent wearable devices, health monitoring, and biological sensing. In this work, single crystal beta-tellurium nanowires were grown on flexible muscovite by molecular beam epitaxy, constructing high-density ordered nanomesh structure. The prepared photodetectors based on tellurium nanomesh exhibit excellent mechanical flexibility, fast response in a broad range from ultraviolet to near-infrared, and good photosensitivity. We found that the flexible photodetectors with Shottky contact drastically suppressed dark current, while the response speed was lowered in comparison to the devices with ohmic contact, as holes would take a long time to tunnel through the Shottky barrier between metal and p-type Te. Moreover, the photoresponse of flexible Shottky photodetectors can be modulated by piezoelectricity of tellurium, and pronounced photocurrent increase after bending many times. Under external stress, polarization charges could tune Shottky barrier height of the metal/tellurium, resulting in variation of photocurrent. This research not only explores the broadband photoresponse and piezoelectric effect of tellurium nanomesh, but also promotes the integration and development of broadband flexible optoelectronic devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available