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Selenophene-Based Hole-Transporting Materials for Perovskite Solar Cells
ChemPlusChem ( IF 3.0 ) Pub Date : 2021-06-24 , DOI: 10.1002/cplu.202100208
Luis A Illicachi 1, 2 , Javier Urieta-Mora 3, 4 , Cristina Momblona 5 , Agustín Molina-Ontoria 3 , Joaquín Calbo 6 , Juan Aragó 6 , Braulio Insuasty 1, 2 , Alejandro Ortiz 1, 2 , Enrique Ortí 6 , Nazario Martín 3, 4 , Mohammad Khaja Nazeeruddin 5
Affiliation  

Two novel and simple donor-π-bridge-donor (D-π-D) hole-transporting materials (HTMs) containing two units of the p-methoxytriphenylamine (TPA) electron donor group covalently bridged by means of the 3,4-dimethoxyselenophene spacer through single and triple bonds are reported. The optoelectronic and thermal properties of the new selenium-containing HTMs have been determined using standard experimental techniques and theoretical density functional theory (DFT) calculations. The selenium-based HTMs have been incorporated in mesoporous perovskite solar cells (PSCs) in combination with the triple-cation perovskite [(FAPbI3)0.87(MAPbBr3)0.13]0.92 [CsPbI3]0.08. Limited values of power conversion efficiencies, up to 13.4 %, in comparison with the archetype spiro-OMeTAD (17.8 %), were obtained. The reduced efficiencies showed by the new HTMs are attributed to their poor film-forming ability, which constrains their photovoltaic performance due to the appearance of structural defects (pinholes).

中文翻译:


用于钙钛矿太阳能电池的硒吩基空穴传输材料



两种新型简单的供体-π-桥-供体(D-π-D)空穴传输材料(HTM),含有两个通过3,4-二甲氧基硒吩共价桥联的对甲氧基三苯胺(TPA)电子供体基团单元报道了通过单键和三键的间隔基。新型含硒 HTM 的光电和热性能已使用标准实验技术和理论密度泛函理论 (DFT) 计算确定。硒基 HTM 已与三重阳离子钙钛矿 [(FAPbI 3 ) 0.87 (MAPbBr 3 ) 0.13 ] 0.92 [CsPbI 3 ] 0.08结合并入介孔钙钛矿太阳能电池(PSC)中。与原型 spiro-OMeTAD (17.8%) 相比,获得了高达 13.4% 的有限功率转换效率值。新型HTM效率降低的原因在于其成膜能力差,结构缺陷(针孔)的出现限制了其光伏性能。
更新日期:2021-07-14
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