Three novel D−π−A structural metal-free organic sensitizers (DBTP−1∼3) are designed, in which a linear planar aromatic group, the di(1-benzothieno)[3,2-b:2′,3′-d]pyrrole is first introduced as the π-bridge for dye-sensitized solar cells. Triphenylamine, 9,9-dimethyle-9H-fluorene and carbazole serve as the electron donor, respectively, while cyanoacrylic acid is used as an electron acceptor and anchoring unit. The photophysical, electrochemical, theoretical calculations have been employed to apprehend the correlation between the structures of DBTP−1∼3 and their photovoltaic performances. Further, co-adsorption studies are used to investigate the electronic recombination of the target dyes. As a result, the maximum power conversion efficiency of 6.50% (short-circuit current of 14.66 mA cm⁻², open-circuit voltage of 0.67 V, and fill factor of 66%) for the 2 mM chenodeoxycholic acid co-adsorbed device based on DBTP−1 is obtained, while without any co-adsorbent it gives efficiency of 4.55%. The standard dye N719 gives 8.54% power conversion efficiency.

三种新型d-π-A结构的无金属有机增感剂（DBTP - 1〜3）被设计，其中一个线性平面的芳族基团中，二（1-苯并噻吩）[3,2- b：2'，3' - d ]吡咯首先被引入作为π桥用于染料敏化太阳能电池。三苯胺，9,9-二甲基-9H-芴和咔唑分别用作电子给体，而氰基丙烯酸用作电子受体和固定单元。光物理，电化学，理论计算已经采用逮捕的结构之间的相关性DBTP - 1〜3及其光伏性能。此外，共吸附研究用于研究目标染料的电子重组。结果，基于2 mM鹅去氧胆酸共吸附装置的最大功率转换效率为6.50％（短路电流为14.66 mA cm ^-2，开路电压为0.67 V，填充系数为66％）在DBTP - 1上获得了5％的收率，而在没有任何助吸附剂的情况下，收效为4.55％。标准染料N719的功率转换效率为8.54％。