ZnS/SiO2协同包覆光阳极制备高效率Zn-Cu-In-Se量子点敏化太阳能电池

通过光阳极协同包覆的策略抑制Zn?Cu?In?Se(ZCISe)量子点敏化太阳能电池(QDSC)中光阳极/电解液界面上的电荷复合过程,提高电荷收集效率和电池光伏性能。采用溶液法在ZCISe量子点敏化的光阳极表面依次沉积包覆ZnS和SiO₂双钝化层,实现较单一ZnS包覆层更有效的界面电荷复合抑制作用,从而提高QDSC的性能。在包覆ZnS/SiO₂双钝化层后,所组装的ZCISe QDSC光电转换效率由传统单一ZnS包覆的12.17%提高到13.23%,这归因于双钝化层对光阳极/电解液界面电荷复合过程的有效抑制,电荷收集效率得到相应提升。

Preparation of High-Efficiency Zn-Cu-In-Se Quantum Dot-Sensitized Solar Cells by ZnS/SiO2 Synergistic Photoanode Coating

The synergistic photoanode coating strategy was applied to inhibit the charge recombination processes at the photoanode/electrolyte interface and improve the photovoltaic performance of Zn-Cu-In-Se (ZCISe) quantum dotsensitized solar cells (QDSC). On the surface of ZCISe QD-sensitized photoanode, ZnS and SiO₂ layers were successively coated by the solution route to form double passivation coating layers. This double-layer treatment offers more effective charge recombination inhibition than the traditional ZnS single coating layer, thus obtaining higher photovoltaic performance for the resulting QDSC. The results indicated that with the coating of ZnS/SiO₂ double passivation layers, the efficiency was increased from 12.17% corresponding to cells with the traditional single ZnS coating to 13.23%. This is mainly due to the effective inhibition of the charge recombination processes at the photoanode/electrolyte interface, and the charge collection efficiency is improved accordingly.