Comparative study of plasma and ion-beam treatment to reduce the oxygen vacancies in TiO₂ and recombination reactions in dye-sensitized solar cells

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• 作者：Md. Khaled Parvez ; Gi Moon Yoo ; Ju Ho Kim ; Min Jae Ko ; Sung Ryong Kim
• 刊名：Chemical Physics Letters
• 出版年：2010
• 出版时间：29 July 2010
• 年：2010
• 卷：495
• 期：1-3
• 页码：69-72
• 全文大小：667 K

文摘

Oxygen plasma and ion-beam treatments of nano-structured TiO₂ were carried out to enhance the efficiency of dye-sensitized solar cells (DSSCs). Relative changes in surface states and recombination reactions were examined. Comparative studies showed that the oxygen ion-beam treatment was more effective in reducing the number of oxygen vacancies in TiO₂ and the recombination reactions between TiO₂ conduction band electrons and ions in the electrolyte than the plasma treatment. Oxygen ion-beam treated TiO₂ film in the DSSC showed a 23 mV increase in the open-circuit voltage (V_oc) and an improvement in the photo-conversion efficiency from 5.05 % to 6.64 % .