Improvement in Solid-State Dye Sensitized Solar Cells by p-Type Doping with Lewis Acid SnCl4

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• 作者：Mi Xu ; Yaoguang Rong ; Zhiliang Ku ; Anyi Mei ; Xiong Li ; Hongwei Han
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：November 7, 2013
• 年：2013
• 卷：117
• 期：44
• 页码：22492-22496
• 全文大小：294K
• 年卷期：v.117,no.44(November 7, 2013)
• ISSN：1932-7455

文摘

The Lewis acid SnCl₄ is employed as a p-type dopant for 2,2鈥?7,7鈥?tetrakis(N,N-di-p-methoxyphenylamine)-9,9鈥?spirobifluorene (spiro-OMeTAD) for the solution process in solid-state dye sensitized solar cell. The UV鈥搗is absorption spectra and time-resolved photoluminescence (PL) spectra are used to investigate the doping level of spiro-OMeTAD with a p-type dopant, indicating the strong molecular acceptor of SnCl₄. X-ray photoelectron spectra (XPS) exhibiting close energy shifts of the Fermi level toward HOMO are observed when adding Li salt or SnCl₄. A significant enhancement in fill factor of the photovoltaic devices, corresponding to the power conversion efficiency, is observed when doping with SnCl₄. This is attributed to the low charge transport resistance of the hole transport film and high hole injection efficiency from the hole transport material to the counter electrode.