dithienocyclopentaspiro[fluorene-9,9′-xanthene], was used as the central block for the first time to design and synthesize A-D-A type small molecule acceptors for nonfullerene polymer solar cells (PSCs), and two new small molecule acceptors of TSFX-2F and TSFX-4F were synthesized based on the C2v-symmetric core. The two TSFX-based acceptors show high thermal stability, strong absorption in the wavelength
一个C 2v对称核,二
硫杂环戊环[
芴-9,9'-x吨]首次被用作设计和合成非
富勒烯聚合物太阳能电池(PSC)的
ADA型小分子受体的中心嵌段,以及两个新的基于C 2v对称核合成了
TSFX-2F和
TSFX-4F的小分子受体。这两种基于
TSFX的受体显示出高的热稳定性,在550-750 nm波长范围内的强吸收和适当的能级。具有宽带隙聚合物J71作为施主和
TSFX-2F作为受主的PSC在开路电压(V下)表现出9.42%的功率转换效率(PCE)oc)为0.89 V,短路电流密度(J sc)为15.27 mA cm -2,填充系数(FF)为69.30%,而基于J71:
TSFX-4F的PSC的PCE为8.47%,而V oc为0.83 V,J sc为15.48 mA cm -2,FF为66.16%。基于J71:
TSFX-2F的PSC的V oc较高,这得益于
TSFX-2F受体的LUMO能级上移,其较高FF可