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Recent progress in interface modification for dye-sensitized solar cells

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Abstract

Interface modification on the TiO2/dye/electrolyte interface of dye-sensitized solar cells (DSCs) is one of the most effective approaches to suppress the charge recombination, improve electron injection and transportation, and thus ameliorate the conversion efficiency and stability of DSCs. Conventional research focusing on the photoanodes interface modification before sensitization in dye-sensitized solar cells has been carried out and reviewed. However, recent studies showed that post-modification after sensitization of the TiO2 electrode also plays a significant role on the TiO2/dye/electrolyte interface. This post-modification using the immersing method could deprotonate dye molecules, prohibit the dye aggregation and retard the recombination reaction. As a result, it has great influence on the devices’ photovoltaic performance. This interface modification could also provide an approach to broaden the response of the solar spectrum by introducing an alternative assembling structure. An in-situ meaning of using a co-adsorbent is employed to modify the interface in the DSCs, which could retard the aggregation of the dye molecules and enhance the conversion efficiency. In addition, electrolyte additives can be used to modify the TiO2/dye/electrolyte interface through some unique mechanisms. Based on the background of interface modification of photoanodes before sensitization, this review introduces various interface modifications after sensitization of dye-sensitized solar cells and their mechanisms.

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  1. Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education; Department of Chemistry, Tsinghua University, Beijing, 100084, China

    BeiBei Ma, Rui Gao, LiDuo Wang, YiFeng Zhu, YanTao Shi, Yi Geng, HaoPeng Dong & Yong Qiu

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Ma, B., Gao, R., Wang, L. et al. Recent progress in interface modification for dye-sensitized solar cells. Sci. China Chem. 53, 1669–1678 (2010). https://doi.org/10.1007/s11426-010-4042-8

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