decrease of the optical gap with an increase of the HOMO level. The four compounds have been evaluated as sensitizers in dye-sensitized solar cells (DSSCs) using a iodide/triiodide liquid electrolyte and the results are discussed in terms of the structure–property relationship with regard to the extension of the conjugated system and the number and position of the octyl side chains using N719 as the
合成了四个线性低聚
噻吩,其含有被可变数量的在一些
噻吩环的β-位连接的辛基链取代的4、5和7个
噻吩环,并具有末端
氰基
丙烯酸锚定基团。UV-Vis吸收光谱法和循环伏安法的结果表明,与预期相符,π共轭体系的扩展导致光学间隙的减小以及HOMO含量的增加。已使用
碘化物/三
碘化物液体电解质对这四种化合物作为
染料敏化太阳能电池(DSSC)中的敏化剂进行了评估,并就共轭体系的扩展,数量和结构对结构与性质的关系进行了讨论。使用N719作为参考系统确定辛基侧链的位置。功率转换效率约为7。