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Effect of TiO2 Nanoparticle Modification on Ultraviolet Photodetection Properties of Al-Doped ZnO Nanowire Network

Title
Effect of TiO2 Nanoparticle Modification on Ultraviolet Photodetection Properties of Al-Doped ZnO Nanowire Network
Authors
Kim, KP[Kim, Kang-Pil]Chang, D[Chang, Daeic]Lim, SK[Lim, Sang Kyoo]Lee, SK[Lee, Soo-Keun]Lyu, HK[Lyu, Hong-Kun]Hwang, DK[Hwang, Dae-Kue]
DGIST Authors
Kim, KP[Kim, Kang-Pil]; Chang, D[Chang, Daeic]; Lim, SK[Lim, Sang Kyoo]Lee, SK[Lee, Soo-Keun]Lyu, HK[Lyu, Hong-Kun]Hwang, DK[Hwang, Dae-Kue]
Issue Date
2011-06
Citation
Japanese Journal of Applied Physics, 50(6)
Type
Article
Article Type
Article; Proceedings Paper
Keywords
Al-Doped ZnOAluminum-Doped Zinc OxideElectron DonationEnhanced ConductivityLight Sensitive MaterialsNanoparticlesNanowire NetworksNanowiresPhoto DetectionPhotodetectorsPhotoresponsesPhotosensitivityTiOTitanium DioxideUltra-VioletUV IlluminationsUV PhotosensitivityVanadiumZinc Oxide
ISSN
0021-4922
Abstract
This study was conducted in order to observe the changes in the ultraviolet (UV) photodetection characteristic when TiO2 nanoparticles are modified on the surface of an aluminum-doped zinc oxide (AZO) nanowire in an AZO nanowire network with enhanced conductivity. According to the experiment results, the UV photosensitivity under a bias of 5V was 52-fold in a bare AZO network, and it increased to 147-fold in the case when TiO2 nanoparticles were modified. The UV reset time decreased from 9 to 5s. The AZO nanowire onto which TiO2 nanoparticles were adsorbed showed an approximately 2-fold faster response time and an approximately 3-fold higher UV photosensitivity than the existing bare AZO nanowire. The faster UV photoresponse time of the AZO nanowire network with adsorbed TiO2 nanoparticles is because the adsorbed TiO2 nanoparticles serve as recombination sites for electrons excited by UV illumination. In addition, with enhanced UV photosensitivity, adsorbed TiO2 nanoparticles serve as electron donation sites that provide additional electrons to the AZO nanowire when UV light is turned on. © 2011 The Japan Society of Applied Physics.
URI
http://hdl.handle.net/20.500.11750/3450
DOI
10.1143/JJAP.50.06GF07
Publisher
Institute of Physics Publishing
Related Researcher
Files:
There are no files associated with this item.
Collection:
ETC1. Journal Articles
Division of Nano∙Energy Convergence Research1. Journal Articles
Division of IoT∙Robotics Convergence Research1. Journal Articles
Intelligent Devices and Systems Research Group1. Journal Articles


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