Near ultraviolet photodetector fabricated from polyvinyl-alcohol coated In2O3 nanoparticles

被引：36

作者：

Shao, Dali ^{[1
]}

Qin, Liqiao ^{[1
]}

Sawyer, Shayla ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Elect Comp & Syst Engn Dept, Troy, NY 12180 USA

来源：

APPLIED SURFACE SCIENCE | 2012年 / 261卷

关键词：

PVA coated In2O3 nanoparticles; Near UV; Surface oxygen vacancy defects; Enhanced photoresponsivity; CARRIER MOBILITY; CHEMICAL SENSORS; PHOTOLUMINESCENCE; SURFACE; ARRAYS; OXYGEN; NANOSTRUCTURES; DETECTORS; NANOWIRES; MECHANISM;

D O I：

10.1016/j.apsusc.2012.07.111

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A near ultraviolet (UV) photodetector is fabricated from colloidal In2O3 nanoparticles coated with polyvinyl-alcohol (PVA). The device exhibits lower dark current and higher responsivity compared with a photodetector fabricated from uncoated In2O3 nanoparticles. The rise and fall time of the PVA coated photodetector is about 500 s and 1600 s, respectively, one half of the uncoated device. The faster response time of the PVA enhanced photodetector is due to surface passivation which reduces the surface defects while enhancing desorption of oxygen from the nanoparticle surface, thus increasing free carrier concentration. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：123 / 127

页数：5

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