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Proceedings Paper

Photoresponse comparison of indium oxide (In2O3) nanomaterials
Author(s): Dali Shao; Liqiao Qin; Shayla Sawyer
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Paper Abstract

Optical properties of In2O3 nanoparticles coated with polyvinyl-alcohol (PVA) are studied. Compared with uncoated In2O3 nanoparticles, PVA coated sample show enhanced UV-blue emission and suppressed parasitic green emission. Ultraviolet (UV)-blue photodetectors were then fabricated by depositing aluminum (Al) as contacts on top of PVA coated and uncoated samples. The photodetector with PVA coating, exhibits lower dark current and higher responsivity than the photodetector without PVA coating. The rise and fall time of the PVA coated photodetector is about 500 s and 1600 s respectively, one half of the uncoated device. These improvements are attributed to surface passivation of In2O3 nanoparticles by PVA, which reduces the surface defects density and increase free carrier concentration of In2O3 nanoparticles.

Paper Details

Date Published: 29 February 2012
PDF: 8 pages
Proc. SPIE 8263, Oxide-based Materials and Devices III, 82630P (29 February 2012); doi: 10.1117/12.908982
Show Author Affiliations
Dali Shao, Rensselaer Polytechnic Institute (United States)
Liqiao Qin, Rensselaer Polytechnic Institute (United States)
Shayla Sawyer, Rensselaer Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 8263:
Oxide-based Materials and Devices III
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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