材料科学
三元运算
带隙
聚合物太阳能电池
接受者
聚合物
富勒烯
有机太阳能电池
光电子学
激子
混合太阳能电池
化学物理
太阳能电池
有机化学
复合材料
凝聚态物理
化学
物理
计算机科学
程序设计语言
作者
Chuanfei Wang,Wei Zhang,Xiangyi Meng,Jonas Bergqvist,Xianjie Liu,Zewdneh Genene,Xiaofeng Xu,Arkady Yartsev,Olle Inganäs,Wei Ma,Ergang Wang,Mats Fahlman
标识
DOI:10.1002/aenm.201700390
摘要
Abstract A new strategy for designing ternary solar cells is reported in this paper. A low‐bandgap polymer named PTB7‐Th and a high‐bandgap polymer named PBDTTS‐FTAZ sharing the same bulk ionization potential and interface positive integer charge transfer energy while featuring complementary absorption spectra are selected. They are used to fabricate efficient ternary solar cells, where the hole can be transported freely between the two donor polymers and collected by the electrode as in one broadband low bandgap polymer. Furthermore, the fullerene acceptor is chosen so that the energy of the positive integer charge transfer state of the two donor polymers is equal to the energy of negative integer charge transfer state of the fullerene, enabling enhanced dissociation of all polymer donor and fullerene acceptor excitons and suppressed bimolecular and trap assistant recombination. The two donor polymers feature good miscibility and energy transfer from high‐bandgap polymer of PBDTTS‐FTAZ to low‐bandgap polymer of PTB7‐Th, which contribute to enhanced performance of the ternary solar cell.
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