苯并三唑
聚合物
材料科学
接受者
聚合
吸收(声学)
电子受体
聚合物太阳能电池
透射电子显微镜
化学工程
能量转换效率
高分子化学
光化学
光电子学
纳米技术
化学
工程类
物理
复合材料
冶金
凝聚态物理
作者
Jiaqi Du,Ke Hu,Jinyuan Zhang,Lei Meng,Jiling Yue,Indunil Angunawela,Hongping Yan,Shuo Qin,Xiaolei Kong,Zhanjun Zhang,Bo Guan,Harald Ade,Yongfang Li
标识
DOI:10.1038/s41467-021-25638-9
摘要
Abstract All-polymer solar cells (all-PSCs) based on polymerized small molecular acceptors (PSMAs) have made significant progress recently. Here, we synthesize two A-DA’D-A small molecule acceptor based PSMAs of PS-Se with benzo[c][1,2,5]thiadiazole A’-core and PN-Se with benzotriazole A’-core, for the studies of the effect of molecular structure on the photovoltaic performance of the PSMAs. The two PSMAs possess broad absorption with PN-Se showing more red-shifted absorption than PS-Se and suitable electronic energy levels for the application as polymer acceptors in the all-PSCs with PBDB-T as polymer donor. Cryogenic transmission electron microscopy visualizes the aggregation behavior of the PBDB-T donor and the PSMA in their solutions. In addition, a bicontinuous-interpenetrating network in the PBDB-T:PN-Se blend film with aggregation size of 10~20 nm is clearly observed by the photoinduced force microscopy. The desirable morphology of the PBDB-T:PN-Se active layer leads its all-PSC showing higher power conversion efficiency of 16.16%.
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