Effect of sulfur doped TiO2 on photovoltaic properties of dye-sensitized solar cells

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• 作者：Hyunwoong Seo ; Sang-Hun Nam ; Naho Itagaki ; Kazunori Koga…
• 刊名：Electronic Materials Letters
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：12
• 期：4
• 页码：530-536
• 全文大小：1,136 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Condensed Matter Physics
  Electronics, Microelectronics and Instrumentation
  Optical and Electronic Materials
  Thermodynamics
  Characterization and Evaluation of Materials
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2093-6788
• 卷排序：12

文摘

In a dye-sensitized solar cell (DSC), a nano-porous semiconductor layer plays an important role in the performance. It determines open-circuit voltage and it affects the dye adsorption capacity and charge transfer, which are closely associated with photocurrent and overall performance. TiO₂ is the most proper material for nano-porous layer since the first development of DSCs. This work focuses on the enhancement of TiO₂ by doping. Sulfur (S) doping enhances charge transfer and the photoconversion of TiO₂. Therefore, the increase in photocurrent and efficiency is expected by S doping. S is doped into TiO₂ by hydrolysis method. The amount of S is varied and their photo-responses are verified. The most effective S doped TiO₂ is applied to DSCs. Overall performance of DSC is enhanced by the addition of S doped TiO₂. Especially, the photocurrent is much increased by the improvement on charge transfer, electron lifetime, and photo-conversion. The photovoltaic properties of DSCs are investigated with various ratios of undoped and S doped TiO₂. Finally, a DSC based on undoped and S doped TiO₂ ratio of 1:1 has the highest efficiency, better than that of a standard DSC based on undoped TiO₂.