Abstract In this study, nitrogen doped CQDs (N-CQDs), as a novel additive, were successfully synthesized and characterized by XPS, TEM and UV–Vis spectrometry techniques. Importantly, we introduced N-CQDs in CH3NH3PbI3 solar cells. The results indicated that nonradiative charge back recombination decreased and the trap states in the absorber layer were passivated when N-CQDs was used an additive in CH3NH3PbI3 solution. Additionally, the morphological characterization results indicated that the crystallization problems and defects on perovskite surfaces can be easily resolved by N-CQDs additive in perovskite solution. A significant improvement in power conversion efficiency at a yield of 14% is achieved by doping of 3 vol% of N-CQDs, thanks to enhancement of charge transport properties due to the morphological and electrical changes. Herein, we propose an effective and novel additive for the fabrication of high efficiency perovskite solar cell, which can be seen that this method is simple.

中文翻译：

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掺氮CQD通过表面钝化提高钙钛矿太阳能电池的功率转换效率

摘要 在本研究中，氮掺杂 CQDs (N-CQDs) 作为一种新型添加剂，成功合成并通过 XPS、TEM 和 UV-Vis 光谱技术表征。重要的是，我们在 CH3NH3PbI3 太阳能电池中引入了 N-CQD。结果表明，当 N-CQDs 在 CH3NH3PbI3 溶液中用作添加剂时，非辐射电荷回复合减少，吸收层中的陷阱态被钝化。此外，形态表征结果表明，钙钛矿溶液中的 N-CQDs 添加剂可以轻松解决钙钛矿表面的结晶问题和缺陷。由于形态和电学变化导致电荷传输特性的增强，通过掺杂 3 vol% 的 N-CQD 实现了 14% 的功率转换效率的显着提高。在此处，