Correlating Multichannel Charge Transfer Dynamics with Tilt Angles of Organic Donor鈥揂cceptor Dyes Anchored on Titania

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• 作者：Yinglin Wang ; Lin Yang ; Mingfei Xu ; Min Zhang ; Yanchun Cai ; Renzhi Li ; Peng Wang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：July 31, 2014
• 年：2014
• 卷：118
• 期：30
• 页码：16441-16446
• 全文大小：359K
• ISSN：1932-7455

文摘

Attaching the side chains onto the electronic backbone of photosensitizing dye molecules has been a widely employed method to enhance the performance of dye-sensitized solar cells (DSCs). However, at the present time the interfacial microstructure as well as its influence on the charge transfer dynamics have not been fully comprehended, both of which underpin the phenomenological photovoltaic characteristics. In this work, we derived the tilt angles of two organic donor鈥揳cceptor dyes anchored on the surface of titania by X-ray reflectivity measurements and probed the broad time scale dynamics of charge transfer reactions in DSCs, unveiling the intrinsic roles of bulky or branched side chains attached to the conjugated segment in modulating photovoltaic behaviors.