The effect of acceptor end groups on the physical and photovoltaic properties of A–π–D–π–A type oligomers with same S, N-heteropentacene central electron donor unit for solution processed organic solar cells
作者:Hyejeoung Lee、Hyeonjun Jo、Dayoung Kim、Subhayan Biswas、Ganesh D. Sharma、Jaejung Ko
DOI:10.1016/j.dyepig.2016.02.029
日期:2016.6
novel acceptor–donor–acceptor small molecules with different end group acceptors such as dicyanovinyl, cyanoacetate and indenedione, denoted as SM1, SM2 and SM3, respectively, linked with same central S, N-heteropentacene donor is described. These small molecules are used as electron donor along with the PC71BM as an electron acceptor for the fabrication of solution processed bulk heterojunction organic
描述并合成了具有不同端基受体的新型受体-供体-受体小分子,如双氰基乙烯基酯,氰基乙酸酯和茚二酮,分别表示为SM1,SM2和SM3,并与相同的中心S,N-异戊四烯供体连接。这些小分子与PC 71 BM一起用作电子给体,用于制造溶液处理的整体异质结有机太阳能电池。基于铸模SM1:PC 71 BM,SM2:PC 71 BM和SM2:PC 71的优化设备使用经过两步退火(即热退火和随后的溶剂蒸汽退火的组合)处理的活性层,BM的功率转换效率分别约为2.01%,1.60%和2.65%,分别提高到5.64%,4.24%和6.64%。功率转换效率的这种提高归因于J sc和FF的增加,这归因于有源层的光收集能力的增强,这反映在有利的纳米级形态上。