Highly efficient all-inorganic perovskite solar cells require a fast charge transfer from CsPbBr₃ to TiO₂ to reduce the recombination from trap states. Herein, we insert a CdS/CdSe/CdS quantum dot (QD) layer between the TiO₂ and CsPbBr₃ layers to fabricate all-inorganic perovskite solar cells. By tuning the thicknesses of the CdSe layer of CdS/CdSe/CdS QDs, the conduction band (CB) levels can be adjusted to -3.72~-3.87 eV. After inserting the QD intermediate layer, the energy offset between the CB of TiO₂ and CsPbBr₃ is reduced, thus leading to a charge transfer rate boost from to . The power conversion efficiency (PCE) of the solar cell with QD intermediate layer achieves 8.64%, which is 20% higher than its counterpart without QDs.

中文翻译：

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通过使用CdS / CdSe / CdS量子点作为中间层的高效全无机CsPbBr3钙钛矿太阳能电池

高效的全无机钙钛矿太阳能电池需要从CsPbBr ₃到TiO ₂的快速电荷转移，以减少陷阱态的复合。在这里，我们在TiO ₂和CsPbBr ₃层之间插入一个CdS / CdSe / CdS量子点（QD）层，以制造全无机钙钛矿型太阳能电池。通过调整CdS / CdSe / CdS QD的CdSe层的厚度，可以将导带（CB）电平调整为-3.72〜-3.87 eV。插入QD中间层后，TiO ₂的CB和CsPbBr ₃之间的能量偏移减小，从而导致电荷转移速率从 至 。具有QD中间层的太阳能电池的功率转换效率（PCE）达到8.64％，比没有QD的太阳能电池高20％。