An unsymmetrical zinc phthalocyanine dye (PCA-ZnPc-4) containing six electron donating hexylsulfanyl groups and a pyrazole-3-carboxylic acid anchoring group which is directly linked to the macrocycle was synthesized to evaluate the photophysical, electrochemical, and theoretical characteristics as well as photovoltaic properties. Previously studied dye PCA-ZnPc-2, which contains the same electron donating groups and pyrazole-3-carboxylic acid anchoring group with the bridging oxygen atom, was used as a reference dye. The optimized dye-sensitized solar cell (DSSC) based on PCA-ZnPc-4 exhibited an impressive power conversion efficiency of 2.52% (J_SC = 6.53 mA cm⁻², V_OC = 0.584 V, FF = 0.66), exceeding that of the DSSC based on PCA-ZnPc-2 (1.86%) under the same conditions. The better photovoltaic performance of PCA-ZnPc-4 is mainly due to its conjugated anchoring group, leading to efficient electron injection. This work demonstrates that the anchoring groups attached to the macrocycle without oxygen linker may enhance the photovoltaic performance of the phthalocyanine-sensitized solar cells.

合成了一种不对称的酞菁锌染料 ( PCA-ZnPc-4 )，它含有六个供电子己硫基和一个与大环直接相连的吡唑-3-羧酸锚定基团，以评估其光物理、电化学和理论特性以及光伏特性。先前研究的染料PCA-ZnPc-2含有相同的给电子基团和具有桥氧原子的 pyrazole-3-羧酸锚定基团，用作参考染料。基于PCA-ZnPc-4的优化染料敏化太阳能电池 (DSSC)表现出令人印象深刻的 2.52% 的功率转换效率 ( J _SC  = 6.53 mA cm ^-2 , V _OC= 0.584 V, FF = 0.66), 超过相同条件下 基于PCA-ZnPc-2 (1.86%) 的 DSSC。PCA-ZnPc-4较好的光伏性能主要是由于其共轭的锚定基团，导致有效的电子注入。这项工作表明，在没有氧接头的情况下连接到大环上的锚定基团可以提高酞菁敏化太阳能电池的光伏性能。