Effect of Coadsorbent on the Photovoltaic Performance of Zinc Pthalocyanine-Sensitized Solar Cells

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• 作者：Jun-Ho Yum ; Song-rim Jang ; Robin Humphry-Baker ; M. Gr&#xe4 ; tzel ; Juan-Jos&#xe9 ; Cid ; Tomas Torres ; Md. K. Nazeeruddin
• 刊名：Langmuir
• 出版年：2008
• 出版时间：May 20, 2008
• 年：2008
• 卷：24
• 期：10
• 页码：5636 - 5640
• 全文大小：693K
• 年卷期：v.24,no.10(May 20, 2008)
• ISSN：1520-5827

文摘

The effect of chenodeoxycholic acid as a coadsorbent on TiO₂ nanocrystalline solar cells incorporating phthalocyanine sensitizers was studied under various conditions. Adding chenodeoxycholic acid onto TiO₂ nanoparticles not only reduces the adsorption of phthalocyanine sensitizers but also prevents sensitizer aggregation, leading to different photovoltaic performance. The inspection of IPCE and absorption spectra showed that the load of phthalocyanine sensitizers is strongly dependent on the molar concentration of chenodeoxycholic acid coadsorbent. The open circuit voltage of the solar cells with chenodeoxycholic acid coadsorbent increases due to the enhanced electron lifetime in TiO₂ nanoparticles coupled with the band edge shift of TiO₂ to negative potentials.