This study reports the using of boron-doped carbon quantum dots (B-CQDs), which can convert ultraviolet to blue light, as an additive in MAPbI based perovskite solar cells (PSCs) for improved photovoltaic performance. After a successful facile synthesis of B-CQDs, our work showed that the appropriate addition of B-CQDs (5% vol.) into MAPbI absorber layer can passivate the grain boundaries of perovskite crystals, improve the crystallinity and the grain sizes. Additionally, optical, and photovoltaic characteristics showed that the addition of B-CQDs can efficiently improve the charge transport properties and the hole extraction, while decreasing the recombination losses. In comparison to control device, power conversion efficiency (PCE) of champion device was increased from 10.4% to 12.7%. This approach of constructing inverted p-i-n PSCs with B-CQDs additives offers a simple way for the preparation of efficient and stable perovskite photovoltaics for future application.

中文翻译：

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钙钛矿太阳能电池中掺硼碳量子点的性能提高


这项研究报告了使用硼掺杂碳量子点 (B-CQD) 作为基于 MAPbI 的钙钛矿太阳能电池 (PSC) 的添加剂，以提高光伏性能，该材料可以将紫外线转换为蓝光。在成功合成 B-CQD 后，我们的工作表明，在 MAPbI 吸收层中适当添加 B-CQD（5％体积）可以钝化钙钛矿晶体的晶界，提高结晶度和晶粒尺寸。此外，光学和光伏特性表明，B-CQD的添加可以有效改善电荷传输性能和空穴提取，同时减少复合损失。与对照器件相比，冠军器件的功率转换效率（PCE）从10.4%提高到12.7%。这种使用 B-CQD 添加剂构建倒置 p-i-n PSC 的方法为制备高效稳定的钙钛矿光伏电池以供未来应用提供了一种简单的方法。