设计并合成了一种新的基于茚并二噻吩基的受体-供体-受体(AD)类型的富勒烯受体材料ITBTC,其具有共轭扩展的苯并[ b ]噻吩稠合端基。与包含2-(3-oxo-2,3-dihydroinden-1-ydrene)malononitrile(IC)端基的众所周知的苯基融合ITIC受体相比,将额外的富电子噻吩并入IC部分可降低端基的电子接受强度,并增加了ITBTC分子的分子间相互作用。结果,ITBTC呈现出升高的最低未占据分子轨道,改善的电子迁移率和更有利的混合膜形态。尽管其吸收发生了蓝移,但由于在短波长范围内有额外的吸收带(由其共轭扩展末端基团诱导),因此基于ITBTC的设备的光电流得以很好地保持。受益于这些特性,基于ITBTC的太阳能电池的功率转换效率(PCE)达到了10.99%,同时开路电压(V oc,0.94 V)和填充系数(FF,71.3%)也得到了改善。与之相比,保持的短路电流密度(J
PHOTOELECTRIC CONVERSION ELEMENT, IMAGING ELEMENT, OPTICAL SENSOR, AND COMPOUND
申请人:FUJIFILM Corporation
公开号:US20210135128A1
公开(公告)日:2021-05-06
The present invention is to provide a photoelectric conversion element having excellent heat resistance. In addition, an imaging element and an optical sensor which include the photoelectric conversion element are provided. Furthermore, a compound applied to the photoelectric conversion element is provided. A photoelectric conversion element according to the present invention includes a conductive film, a photoelectric conversion film, and a transparent conductive film, in this order, in which the photoelectric conversion film contains a compound represented by Formula (1).
In Formula (1), Y
1
represents a group represented by Formula (1-1) or a group represented by Formula (1-2).