We developed novel hybrid ligands to passivate PbS colloidal quantum dots (CQDs), and two kinds of solar cells based on as-synthesized CQDs were fabricated to verify the passivation effects of the ligands. It was found that the ligands strongly affected the optical and electrical properties of CQDs, and the performances of solar cells were enhanced strongly. The optimized hybrid ligands, oleic amine/octyl-phosphine acid/CdCl2 improved power conversion efficiency (PCE) to much higher of 3.72 % for Schottky diode cell and 5.04 % for p-n junction cell. These results may be beneficial to design passivation strategy for low-cost and high-performance CQDs solar cells.

中文翻译：

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用于钝化PbS胶体量子点以增强太阳能电池性能的新型混合配体。

我们开发了新型的混合配体来钝化PbS胶体量子点（CQDs），并基于合成的CQDs制备了两种太阳能电池以验证配体的钝化效果。发现配体强烈影响CQD的光学和电学性质，并且太阳能电池的性能大大增强。优化的杂化配体油胺/辛基膦酸/ CdCl2将功率转换效率（PCE）提高到肖特基二极管电池的3.72％和pn结电池的5.04％。这些结果可能有益于设计低成本和高性能CQD太阳能电池的钝化策略。