A thieno[3,2-b]thiophene-functionalized porphyrin molecule (DEP-TT) with the ethynylene bridges between the diketopyrrolopyrrole and porphyrin units has been designed and synthesized as the donor material. DEP-TT exhibits a broad absorption wavelength in the visible region with the onset absorption to 898 nm of the film and a low optical band gap of 1.38 eV. IDT-C8, as the acceptor material has a relatively strong absorption spectrum ranging from 500 to 750 nm in the solid film, which exactly fills the absorption trough of DEP-TT. The power conversion efficiency (PCE) of all small molecule increased from 0.64% (J_sc = 2.61 mA cm⁻², V_oc = 0.82 V, and FF = 0.30) to 5.14% (J_sc = 11.15 mA cm⁻², V_oc = 0.71 V, and FF = 0.65) after solvent vapor annealing. The PCE of 5.14% provided valuable recommendation based on porphyrin all small molecule system, since few work has involved in this field.

设计并合成了在二酮吡咯并吡咯和卟啉单元之间具有亚乙炔桥的噻吩并[3,2 - b ]噻吩官能化的卟啉分子（DEP-TT），作为供体材料。DEP-TT在可见光区域显示出较宽的吸收波长，薄膜的起始吸收至898 nm，低光学带隙为1.38 eV。作为受体材料的IDT-C8在固体膜中具有从500到750 nm的相对较强的吸收光谱，正好填充了DEP-TT的吸收槽。所有小分子的功率转换效率（PCE）从0.64％（J _sc  = 2.61 mA cm ^-2，V _OC  = 0.82 V，和FF = 0.30）到5.14％（Ĵ _SC  =11.15毫安厘米^-2，V _OC  = 0.71 V，和FF = 0.65）溶剂蒸气退火后。5.14％的PCE基于卟啉全小分子体系提供了有价值的建议，因为该领域的工作很少。