期刊
OPTICAL MATERIALS
卷 33, 期 3, 页码 359-362出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2010.09.020
关键词
Zinc oxide (ZnO) nanoparticles; Polyvinyl-alcohol (PVA); Ultraviolet (UV) photoconductor; Surface passivation
资金
- National Security Technologies through NSF Industry/University Cooperative Research Center Connection One
- National Science Foundation Smart Lighting Engineering Research Center [EEC-0812056]
Zinc oxide nanoparticles were created by a top-down wet-chemical etching process and then coated with polyvinyl-alcohol (PVA), exhibiting sizes ranging from 10 to 120 nm with an average size approximately 80 nm. The PVA layer provides surface passivation of zinc oxide nanoparticles. As a result of PVA coating, enhancement in ultraviolet emission and suppression of parasitic green emission is observed. Photoconductors fabricated using the PVA coated zinc oxide nanoparticles exhibited a ratio of ultraviolet photo-generated current to dark current as high as 4.5 x 10(4), 5 times better than that of the devices fabricated using uncoated ZnO nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.
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