Two different donor subunits substituted unsymmetrical squaraines for solution-processed small molecule organic solar cells
作者:Daobin Yang、Yan Jiao、Yan Huang、Taojun Zhuang、Lin Yang、Zhiyun Lu、Xuemei Pu、Hisahiro Sasabe、Junji Kido
DOI:10.1016/j.orgel.2016.02.009
日期:2016.5
Two unsymmetrical squaraines (USQs) with different donor (D) subunits as photovoltaic materials, namely USQ-11 and USQ-12, were designed and synthesized to investigate the effect of different D subunits on the optoelectronic properties of USQs for the first time. The two USQs compounds were characterized for optical, electrochemical, quantum chemical and optoelectronic properties. By changing the two
设计并合成了两个具有不同供体(D)亚基作为光伏材料的不对称偏方(USQ),即USQ-11和USQ-12,以首次研究不同D亚基对USQs光电性能的影响。这两种USQs化合物具有光学,电化学,量子化学和光电特性。通过将连接到方酸核心的两个不同的D亚基从2,3,3-三甲基吲哚变为2-甲基苯并噻唑,可以以0.07 eV的步进调整HOMO能级,并且可以实现非常不同的固态聚集(H-或通过紫外-可见吸收光谱在薄膜中观察到了J-聚集现象,这归因于其独特的空间效应和偶极矩。71 BM(1:5,wt%)的PCE(4.27%)比USQ-12 / PC 71 BM(2.78%)高得多。PCE大大增强应归因于同时提高的V oc,J sc和FF。