Acta Photonica Sinica, Volume. 35, Issue 8, 1187(2006)
Study on UV Photoelectric Properties of Nanocrystalline TiO2∶Zn Film Electrodes
The Zn2+-doped nanocrystalline anatase-type TiO2 film electrodes were prepared by sol-gel method. The photoelectric properties of the electrodes with different concentration of Zn2+ were studied by photocurrent action spectra and current-potential (I-U) curves. According to the action spectra,the concentration of Zn2+ can affect the photocurrent magnitude remarkably and its optimum is dependent on the particle-size of T1O2. Illuminated by 320 nm monochromatic light,Zn2+-doped TiO2 film electrode with the concentration of 0.1 mol% produced the largest photocurrent which increased 40% compared with which produced by undoped electrode. The I-U curves show that the conversion from anodic current to cathodic current occurs in all illuminated TiO2 film electrodes during the potential dropping from 1.OV to -0.4V,and the onset potential of anodic current was affected by the concentration of Zn2+. In the region of cathodic potential,in addition,similar cathodic dark current was observed for each electrode and it increased rapidly with a dropping potential.
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Fu Yao, Cao Wanghe. Study on UV Photoelectric Properties of Nanocrystalline TiO2∶Zn Film Electrodes[J]. Acta Photonica Sinica, 2006, 35(8): 1187
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Received: May. 24, 2005
Accepted: --
Published Online: Jun. 3, 2010
The Author Email: Wanghe Cao (whcao@online.In.cn)
CSTR:32186.14.