This report is to address the limitation of conventional dye-sensitized solar cells (DSSCs) designed using pristine ZnO and N719 dye, which suffers from low performance due to the high charge carrier recombination and the formation of Zn²⁺-N719 complex over the surface of photoanode. Here we demonstrate the fabrication of ZnO–In₂O₃ heterojunction based photoanode to extend the charge carrier lifetime by effective interfacial transfer and to boost the light harvesting capacity in dye sensitized solar cells. This opted strategy also helps to prevent the formation dye complex over the photoanode surface. As a result, ZnO–In₂O₃ heterojunction with optimal composite ratio (1:1) could show better DSSC performance compared to remaining samples when applied as photoanode. Optical analyses and impedance measurements confirmed the enhanced visible light absorption and reduced charge transfer resistance of the composite photoanode due to the modification of ZnO using In₂O₃ as a counterpart. The results showed that the optimally designed photoanode with superior charge carrier life time and low charge transfer resistance exhibits power conversion efficiency (PCE) of 1.22%, which is nearly 4 times than the pristine ZnO.

本报告旨在解决使用原始 ZnO 和 N719 染料设计的传统染料敏化太阳能电池 (DSSC) 的局限性，由于高电荷载流子复合和在表面形成 Zn ²⁺ -N719 复合物，其性能低下光阳极。在这里，我们展示了基于 ZnO-In ₂ O ₃异质结的光阳极的制造，以通过有效的界面转移来延长电荷载流子的寿命，并提高染料敏化太阳能电池的光收集能力。这种选择的策略还有助于防止在光阳极表面形成染料复合物。因此，ZnO–In ₂ O ₃当用作光电阳极时，具有最佳复合比 (1:1) 的异质结与其余样品相比可以显示出更好的 DSSC 性能。光学分析和阻抗测量证实，由于使用 In ₂ O ₃作为对应物对 ZnO 进行改性，复合光阳极的可见光吸收增强和电荷转移电阻降低。结果表明，优化设计的光电阳极具有优异的电荷载流子寿命和低电荷转移电阻，其功率转换效率 (PCE) 为 1.22%，是原始 ZnO 的近 4 倍。