咔唑
有机太阳能电池
富勒烯
光伏
硅
能量转换效率
表面改性
吸收(声学)
材料科学
光化学
分子
化学
化学工程
光伏系统
光电子学
有机化学
物理化学
工程类
复合材料
聚合物
电气工程
作者
Yi-Jia Su,Shang-Hsuan Wu,Sheng-Ci Huang,Hebing Nie,Tsung-Wei Chen,Jiun‐Tai Chen,Chain‐Shu Hsu
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-11-10
卷期号:5 (11): 13851-13860
被引量:4
标识
DOI:10.1021/acsaem.2c02472
摘要
In this work, the strategies of extended conjugation and end-group modification are used to design four non-fullerene acceptors, DTTSiC-2F, DTTSiC-2Cl, DTTSiC-4F, and DTTSiC-4Cl. To investigate the influence of extended conjugation and end-group modification, grazing-incidence wide-angle X-ray scattering is used to analyze the packing alignment of the molecules. Photovoltaic performances under both AM 1.5G and indoor conditions are examined. Owing to the push-pull effect, DTTSiC-2F and DTTSiC-2Cl manifest a much higher lowest unoccupied molecular orbital, resulting in higher VOC. DTTSiC-4F and DTTSiC-4Cl manifest higher JSC due to the red-shifted and stronger absorption. Under indoor conditions, devices based on PM6:DTTSiC-4Cl exhibit a power conversion efficiency of 19.18% with a VOC of 0.79 V, a JSC of 92.15 μA/cm2, and an FF of 73.21%, proving that extended conjugation and end-group modification are particularly promising strategies for developing indoor organic photovoltaics.
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