Influence of the Sensitizer Adsorption Mode on the Open-Circuit Potential of Dye-Sensitized Solar Cells

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• 作者：Filippo De Angelis ; Simona Fantacci ; Annabella Selloni ; Michael Gr&auml ; tzel ; Mohammed K. Nazeeruddin
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：October 2007
• 年：2007
• 卷：7
• 期：10
• 页码：3189 - 3195
• 全文大小：597K
• 年卷期：v.7,no.10(October 2007)
• ISSN：1530-6992

文摘

We report a combined experimental and theoretical study on the origin of the different open circuit potentials observed in dye-sensitized solarcells using Ru(II)-polypyridyl homoleptic and heteroleptic sensitizers. We have measured the photovoltaic data of different sensitizers andused DFT calculations to analyze the electronic structure of dye-sensitized TiO₂ nanoparticles. Heteroleptic sensitizers adsorb onto TiO₂ viaa single bipyridine, leading to a TiO₂ conduction band downshift and overall reduction of the cell open circuit potential.