Four organic dyes with asymmetric double donor-π-acceptor system were designed, synthesized and utilized in dye-sensitized solar cells (DSSCs), where phenothiazine and carbazole were introduced as double donors, butyl or octyl chain as the linker and cyanoacetic acid or rhodanine acetic acid as the electron acceptor. The design of double donor-π-acceptor system contributes to a distinctive increase of the molar extinction coefficient and benefits light-harvesting capability of these dyes. Due to superior electron injection efficiency, CPC-series dyes with cyanoacetic acid acceptor exhibit broader IPCE spectra and high IPCE responsive value compared with rhodanine-3-acetic acid acceptor, leading to higher J_SC. Long alkyl chain favors antiaggregation effect and low charge recombination rate is observed for dyes with octyl chain which display higher V_OC than those with butyl chain. Among four dyes, dye with octyl chain and cyanoacetic acid acceptor exhibits the highest short-circuit photocurrent density (9.64 mA cm⁻²) and open-circuit photovoltage (720 mV), leading to the best overall power conversion efficiency of 4.76%.

设计，合成并利用了四种具有不对称双供体-π-受体体系的有机染料，并将其用于染料敏化太阳能电池（DSSC），其中吩噻嗪和咔唑被引入为双供体，丁基或辛基链为连接体，氰基乙酸或若丹宁乙酸作为电子受体。双供体-π-受体体系的设计有助于显着提高摩尔消光系数，并有利于这些染料的光收集能力。由于具有优异的电子注入效率，具有氰基乙酸受体的CPC系列染料与若丹宁-3-乙酸受体相比，具有更宽的IPCE光谱和更高的IPCE响应值，从而导致更高的J _SC。观察到与辛基链，其显示更高的染料长烷基链的恩惠的抗凝集效果和低电荷重组速率V _OC比那些用丁基链。在四种染料中，具有辛基链和氰基乙酸受体的染料表现出最高的短路光电流密度（9.64 mA cm ^-2）和开路光电压（720 mV），导致最佳的总功率转换效率为4.76％。