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Chin. Phys. B, 2012, Vol. 21(11): 118401    DOI: 10.1088/1674-1056/21/11/118401
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Application of TiO2 with different structures in solar cells

Zhang Tian-Hui (张天慧), Piao Ling-Yu (朴玲钰), Zhao Su-Ling (赵谡玲), Xu Zheng (徐征), Wu Qian (吴谦), Kong Chao (孔超 )
a National Center for Nanoscience and Technology, Beijing 100190, China;
b Key Laboratory of Luminescence and Optical Information of the Ministry of Education Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China
Abstract  The applications of TiO2-based devices are mainly dependent on their crystalline structure, morphology, size, and exposed facets. Two kinds of TiO2 with different structures, namely TiO2 pompons and TiO2 nanotubes, have been prepared by hydrothermal method. The TiO2 with different structures is characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET) surface area analysis. Solar cells based on poly(3-hexylthiophene) (P3HT) and TiO2 with different structures are fabricated. In the device ITO/TiO2/P3HT/Au, the P3HT is designed to act as the electron donor, and TiO2 pompons and TiO2 nanotubes act as the electron acceptor. The effects of TiO2 structure on the performance of hybrid heterojunction solar cells are investigated. The device with TiO2 pompons has an open circuit voltage (Voc) of 0.51 V, a short circuit current (Jsc) of 0.21 mA/cm2, and a fill factor (FF) of 28.3%. Another device with TiO2 nanotubes has a Voc of 0.5 V, Jsc of 0.27 mA/cm2, and FF of 28.4%. The results indicate that the TiO2 nanotubes with unidimensional structure have better carrier transport and light absorption properties than TiO2 pompons. Consequently, the solar cell based on TiO2 nanotubes has better performance.
Keywords:  TiO2 pompons      TiO2 nanotubes      heterojunction solar cell  
Received:  15 January 2012      Revised:  11 June 2012      Accepted manuscript online: 
PACS:  84.60.Jt (Photoelectric conversion)  
  88.40.-j (Solar energy)  
  88.40.jr (Organic photovoltaics)  
  81.05.Hd (Other semiconductors)  
Fund: Project supported by the Ministry of Science and Technology of China (Grant No. 2011CB932802), the National Natural Science Foundation of China (Grant No. 60978060), and the Beijing Municipal Science & Technology Commission, China (Grant No. Z090803044009001).
Corresponding Authors:  Piao Ling-Yu, Zhao Su-Ling     E-mail:  piaoly@nanoctr.cn; slzhao@bjtu.edu.cn

Cite this article: 

Zhang Tian-Hui (张天慧), Piao Ling-Yu (朴玲钰), Zhao Su-Ling (赵谡玲), Xu Zheng (徐征), Wu Qian (吴谦), Kong Chao (孔超 ) Application of TiO2 with different structures in solar cells 2012 Chin. Phys. B 21 118401

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