Photoresponse comparison of indium oxide (In2O3) nanomaterials

Dali Shao; Liqiao Qin; Shayla Sawyer

doi:10.1117/12.908982

29 February 2012 Photoresponse comparison of indium oxide (In₂O₃) nanomaterials

Dali Shao, Liqiao Qin, Shayla Sawyer

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.

Citation Download Citation

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

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