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Acta Physico-Chimica Sinica  2011, Vol. 27 Issue (04): 881-886    DOI: 10.3866/PKU.WHXB20110413
ELECTROCHEMISTRY AND NEW ENERGY     
TiO2 Thin-Film Electrode Modified by Co-Adsorbents
LI Jie, KONG Fan-Tai, WU Guo-Hua, ZHANG Chang-Neng, DAI Song-Yuan
Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
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Abstract  

A co-adsorbents modified nanocrystalline TiO2 thin-film electrode was studied for application in dye-sensitized solar cells. The effects of di(3,3-dimethylbutyl) phosphoric acid and chenodeoxycholic acid modification on the flat band potential and the passivation of the TiO2 thin-film electrode were investigated by determining the flat-band potential and undertaking electrochemical impedance spectroscopy (EIS). The results suggest that di(3,3-dimethylbutyl) phosphoric acid is more effective in passivating the TiO2 film surface and in shifting the flat-band potential negatively. For the dye-sensitized solar cells, EIS measurements indicate that the use of di(3,3-dimethylbutyl) phosphoric acid as a co-adsorbent may be more effective in increasing the electronic lifetime and the open-circuit voltage of the device than chenodeoxycholic acid.



Key wordsDye-sensitized solar cell      Coadsorbent      Dark current      Flat-band potential      Electrochemical impedance spectroscopy     
Received: 03 December 2010      Published: 03 March 2011
MSC2000:  O646  
  O649  
Fund:  

The project was supported by the National Key Basic Research Program of China (2011CBA00700), National Natural Science Foundation of China (21003130) and Natural Science Foundation of Anhui Province, China (090414174).

Corresponding Authors: KONG Fan-Tai,DAI Song-Yuan     E-mail: solar@ipp.ac.cn; sydai@ipp.ac.cn
Cite this article:

LI Jie, KONG Fan-Tai, WU Guo-Hua, ZHANG Chang-Neng, DAI Song-Yuan. TiO2 Thin-Film Electrode Modified by Co-Adsorbents. Acta Physico-Chimica Sinica, 2011, 27(04): 881-886.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20110413     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2011/V27/I04/881

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