Journal
SMALL
Volume 18, Issue 16, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202200415
Keywords
GaSb nanowires; lead-free all-inorganic perovskites; photodetectors; Schottky contacts; surface decoration
Categories
Funding
- National Key R&D Program of China [2017YFA0305500]
- National Natural Science Foundation of China [61904096]
- Taishan Scholars Program of Shandong Province [tsqn201812006]
- Shandong University multidisciplinary research and innovation team of young scholars [2020QNQT015]
- Outstanding youth scholar and Qilu young scholar programs of Shandong University
Ask authors/readers for more resources
Lead-free all-inorganic perovskites are used to decorate the surfaces of GaSb nanowires to construct Schottky-contacts. This contact method reduces dark current, improves the light-to-dark ratio and response time, and exhibits good infrared photodetection ability.
The surface Fermi level pinning effect promotes the formation of metal-independent Ohmic contacts for the high-speed GaSb nanowires (NWs) electronic devices, however, it limits next-generation optoelectronic devices. In this work, lead-free all-inorganic perovskites with broad bandgaps and low work functions are adopted to decorate the surfaces of GaSb NWs, demonstrating the success in the construction of Schottky-contacts by surface engineering. Benefiting from the expected Schottky barrier, the dark current is reduced to 2 pA, the I-light/I-dark ratio is improved to 10(3) and the response time is reduced by more than 15 times. Furthermore, a Schottky-contacted parallel array GaSb NWs photodetector is also fabricated by the contact printing technology, showing a higher photocurrent and a low dark current of 15 pA, along with the good infrared photodetection ability for a concealed target. All results guide the construction of Schottky-contacts by surface decorations for next-generation high-performance III-V NWs optoelectronics 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