29 February 2012 Photoresponse comparison of indium oxide (In2O3) nanomaterials
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Proceedings Volume 8263, Oxide-based Materials and Devices III; 82630P (2012) https://doi.org/10.1117/12.908982
Event: SPIE OPTO, 2012, San Francisco, California, United States
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.
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Dali Shao, Dali Shao, Liqiao Qin, Liqiao Qin, Shayla Sawyer, Shayla Sawyer, } "Photoresponse comparison of indium oxide (In2O3) nanomaterials", Proc. SPIE 8263, Oxide-based Materials and Devices III, 82630P (29 February 2012); doi: 10.1117/12.908982; https://doi.org/10.1117/12.908982
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