材料科学
有机太阳能电池
接受者
电子受体
喹喔啉
聚合物太阳能电池
光电子学
超快激光光谱学
吸收(声学)
能量转换效率
小分子
光伏系统
化学物理
光谱学
光化学
聚合物
化学
有机化学
生态学
量子力学
凝聚态物理
复合材料
物理
生物化学
生物
作者
Zichun Zhou,Wenrui Liu,Guanqing Zhou,Ming Zhang,Deping Qian,Jianyun Zhang,Shanshan Chen,Shengjie Xu,Changduk Yang,Feng Gao,Haiming Zhu,Feng Liu,Xiaozhang Zhu
标识
DOI:10.1002/adma.201906324
摘要
Abstract Manipulating charge generation in a broad spectral region has proved to be crucial for nonfullerene‐electron‐acceptor‐based organic solar cells (OSCs). 16.64% high efficiency binary OSCs are achieved through the use of a novel electron acceptor AQx‐2 with quinoxaline‐containing fused core and PBDB‐TF as donor. The significant increase in photovoltaic performance of AQx‐2 based devices is obtained merely by a subtle tailoring in molecular structure of its analogue AQx‐1. Combining the detailed morphology and transient absorption spectroscopy analyses, a good structure–morphology–property relationship is established. The stronger π–π interaction results in efficient electron hopping and balanced electron and hole mobilities attributed to good charge transport. Moreover, the reduced phase separation morphology of AQx‐2‐based bulk heterojunction blend boosts hole transfer and suppresses geminate recombination. Such success in molecule design and precise morphology optimization may lead to next‐generation high‐performance OSCs.
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