烷基
有机太阳能电池
材料科学
溶解度
接受者
三元运算
支化(高分子化学)
吡咯
小分子
分子
高分子化学
组合化学
化学
有机化学
计算机科学
聚合物
物理
程序设计语言
生物化学
凝聚态物理
作者
Kui Jiang,Qiuping Wei,Joshua Yuk Lin Lai,Zhengxing Peng,Ha Kyung Kim,Jun Yuan,Long Ye,Yingping Zou,He Yan
出处
期刊:Joule
[Elsevier]
日期:2019-12-01
卷期号:3 (12): 3020-3033
被引量:763
标识
DOI:10.1016/j.joule.2019.09.010
摘要
The field of organic solar cells has seen rapid developments after the report of a high-efficiency (15.7%) small molecule acceptor (SMA) named Y6. In this paper, we design and synthesize a family of SMAs with an aromatic backbone identical to that of Y6 but with different alkyl chains to investigate the influence of alkyl chains on the properties and performance of the SMAs. First, we show that it is beneficial to use branched alkyl chains on the nitrogen atoms of the pyrrole motif of the Y6. In addition, the branching position of the alkyl chains also has a major influence on material and device properties. The SMA with 3rd-position branched alkyl chains (named N3) exhibits optimal solubility and electronic and morphological properties, thus yielding the best performance. Further device optimization using a ternary strategy allows us to achieve a high efficiency of 16.74% (and a certified efficiency of 16.42%).
科研通智能强力驱动
Strongly Powered by AbleSci AI