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

Hyunwoong Seo, Sang Hun Nam, Naho Itagaki, Kazunori Koga, Masaharu Shiratani, Jin Hyo Boo

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)530-536
Number of pages7
JournalElectronic Materials Letters
Issue number4
Publication statusPublished - Jul 1 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials


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