Plasmon-Enhanced Electron Injection in Dye-Sensitized Solar Cells

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• 作者：S. Ramakrishna ; Matthew Pelton ; Stephen K. Gray ; Tamar Seideman
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：October 1, 2015
• 年：2015
• 卷：119
• 期：39
• 页码：22640-22645
• 全文大小：346K
• ISSN：1932-7455

文摘

Recent experiments have shown that the efficiency of photoinduced electron transfer from sensitizers (molecules or quantum dots) to semiconductors can be enhanced by coupling the sensitizers to plasmon resonances in metal nanoparticles. Here, we use a model-Hamiltonian approach to show theoretically that there is an optimal coupling between the sensitizer and plasmons that maximizes the electron-transfer efficiency. This optimum results from the competition between electron transfer, plasmon relaxation, and plasmon decoherence. For coupling values that exceed the optimal value, the dynamics of electron transfer from the sensitizer to the semiconductor can be significantly modified due to the sensitizer鈥損lasmon coupling.