Manganese ion doped CsPbX₃ perovskite quantum dots (QDs) demonstrate high absorption of ultraviolet (UV) light and efficient orange emission with a large Stokes shift, and are almost transparent to visible light, which are ideal photon energy converters for solar cells. In this work, Mn²⁺ ion doped CsPbCl₃ QDs were synthesized by incorporating a long-chain ammonium ligand dodecyl dimethylammonium chloride (DDAC), in which the DDAC ligand not only played the role of replacing the surface ligands of QDs, but also enhanced the efficiency and stability of Mn²⁺ ion doped QDs. The as-prepared QD sample displayed a photoluminescence quantum yield (PLQY) as high as 91% and served as a photon energy converter for silicon solar cells (SSCs). The photoelectric conversion efficiency (PCE) of SSCs increased from 19.64% to 20.65% with a relative enhancement of 5.14%. This work displays a method to tune the efficiency of QDs by modifying the surface ligands and an efficient photon energy converter for SSCs, which is of great importance for practical applications.

中文翻译：

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高效配体修饰的锰离子掺杂的CsPbCl3钙钛矿量子点，用于硅太阳能电池中的光子能量转换。

锰离子掺杂的CsPbX ₃钙钛矿量子点（QDs）表现出高的紫外线（UV）吸收率和有效的橙光发射（具有大的斯托克斯位移），并且几乎对可见光透明，这是太阳能电池的理想光子能量转换器。在这项工作中，通过掺入长链铵配体十二烷基二甲基氯化铵（DDAC）合成了Mn ²⁺离子掺杂的CsPbCl ₃ QD，其中DDAC配体不仅起到取代QDs表面配体的作用，而且还增强了Mn ²⁺的效率和稳定性离子掺杂的量子点。制备的QD样品显示出高达91％的光致发光量子产率（PLQY），并用作硅太阳能电池（SSC）的光子能量转换器。SSC的光电转换效率（PCE）从19.64％提高到20.65％，相对提高了5.14％。这项工作展示了一种通过修饰表面配体来调节QD效率的方法以及一种用于SSC的高效光子能量转换器，这对于实际应用非常重要。