Polymer-Assisted Construction of Mesoporous TiO2 Layers for Improving Perovskite Solar Cell Performance

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• 作者：Youfeng Yue ; Tomokazu Umeyama ; Yuki Kohara ; Hitoshi Kashio ; Masateru Itoh ; Seigo Ito ; Easan Sivaniah ; Hiroshi Imahori
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：October 8, 2015
• 年：2015
• 卷：119
• 期：40
• 页码：22847-22854
• 全文大小：472K
• ISSN：1932-7455

文摘

A general polymer, poly(methyl methacrylate) (PMMA) is utilized as a unique templating agent for forming crack-free mesoporous TiO₂ films by a sol鈥揼el method. The pore morphologies were found to be controllable by varying the amount of PMMA. The PMMA-mediated mesoporous TiO₂ layer has been applied for the first time to perovskite solar cells exhibiting a best power conversion efficiency of 鈮?4%, which is ca. three times higher than that using a TiO₂ layer prepared by the same sol鈥揼el method without the polymer addition (5.28%). Remarkably, it was superior to the reference device with mesoporous TiO₂ layer prepared with conventional nanoparticle paste (13.1%). Such mesostructure-tuned TiO₂ layers made by the facile sol鈥揼el technique with a commercially available polymer additive has the great potential to contribute significantly toward the development of low-cost, highly efficient perovskite solar cells as well as other functional hybrid devices.