噻吩
有机太阳能电池
富勒烯
侧链
材料科学
能量转换效率
聚合物太阳能电池
结晶度
光伏系统
接受者
吸收(声学)
光化学
聚合物
光电子学
化学
有机化学
复合材料
生态学
物理
生物
凝聚态物理
作者
Soyeong Jeong,Hwanil Je,Ji Hyun Lee,Seung Hun Lee,Soo-Young Jang,Kiyoung Park,Hongkyu Kang,Soon-Ki Kwon,Yun-Hi Kim,Kwang-Hee Lee
标识
DOI:10.1016/j.dyepig.2021.109987
摘要
A new series of ITIC-based non-fullerene acceptors (NFAs), namely m-ITTC-Oeh-SM (IT-SM) and m-ITTC-Oeh-DSM (IT-DSM), which contain thiophene-substituted end groups (EGs) with single and double thiomethyl side chains, respectively, were designed, synthesized, and characterized in this study. The IT-SM NFA exhibited a narrower optical band gap, redshifted absorption, stronger crystallinity, and smoother surface morphology than those of the IT-DSM NFA. Organic solar cells (OSCs) based on the polymer donor PBDB-T and IT-SM reported a power conversion efficiency (PCE) of 8.98% with the addition of 0.5 v/v% 1,8-diiodooctane (DIO), whereas the PCE of the PBDB-T:IT-DSM device was equal to 3.02%. The difference between the PCE values of these two devices was attributed to the gap of the short-circuit current and fill factor. Detailed analyses of the charge transport, collection, and morphology of the blend films were performed to investigate the difference between the device performances. The results of this study can help formulate detailed guidelines for the commercialized production of NFAs.
科研通智能强力驱动
Strongly Powered by AbleSci AI