Treatment of TiO2 with COOH‐Functionalized Germanium Nanoparticles to Enhance the Photocurrent of Dye‐Sensitized Solar Cells |
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| Authors: | Chang‐Ho Kim Eun‐Sung Ha Dr Hionsuck Baik Prof Kang‐Jin Kim |
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| Institution: | 1. Department of Chemistry Korea University, Seoul 136‐713 (Republic of Korea), Fax: (+82)?2‐3290‐3121;2. Seoul Center, Korea Basic Science Institute, Seoul 136‐713 (Republic of Korea) |
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| Abstract: | A dye‐sensitized solar cell (DSSC) containing a TiO2 film treated with COOH‐functionalized germanium nanoparticles (Ge? COOH Nps) exhibited a higher short‐circuit photocurrent density (Jsc; 15.4 mA cm?2) compared to the corresponding untreated DSSC (13.4 mA cm?2) using N719 and a 12 μm thick TiO2 film at 100 mW cm?2. The amount of N719 attached to the treated TiO2 film was 21 % greater than that attached to the untreated TiO2 film. Enhancement of the Jsc value by 15 % was attributed mostly to an intramolecular charge transfer from N719 attached to the Ge? COOH Nps to the TiO2 conduction band through the Ge? COOH Nps. |
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| Keywords: | charge transfer dye‐sensitized solar cells germanium nanoparticles short‐circuit photocurrent |
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