噻吩
轨道能级差
富勒烯
材料科学
光化学
酞菁
能量转换效率
电子受体
有机太阳能电池
接受者
电子供体
环加成
光电子学
化学
纳米技术
有机化学
分子
催化作用
聚合物
物理
复合材料
凝聚态物理
作者
Yonggang Zhen,Nobuaki Obata,Yutaka Matsuo,Eiichi Nakamura
标识
DOI:10.1002/asia.201200698
摘要
Abstract We synthesized a new 56‐π‐electron fullerene derivative through a Diels–Alder cycloaddition of benzo[ c ]thiophene that featured a relatively low temperature, closer to stoichiometric use of the diene, and easy product purification. The 56‐π‐electron benzo[ c ]thiophene diadduct ( BTCDA ) has a LUMO energy level of 0.09 to 0.18 eV higher than that of 58‐π‐electron fullerenes, and therefore, the BTCDA ‐based organic photovoltaic device exhibited a higher open‐circuit voltage and power‐conversion efficiency (PCE). When used with a binary‐donor system, including visible‐light‐harvesting tetrabenzoporphyrin ( BP ) and near‐IR‐harvesting titanyl phthalocyanine ( TiOPc ), the device had a PCE that was 1.5–3 times higher (2.8 %) than that for devices with BP or TiOPc alone because the binary‐donor device can utilize light between λ =350 and 950 nm.
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