论文标题
金属卤化物钙钛矿量子点中高缺陷耐受性的解释
An explanation for high defect tolerance in metal halide perovskite quantum dots
论文作者
论文摘要
我们提出了类似螺旋钻的过程，并在金属卤化物钙钛矿量子点中辅助辅助缺陷，其中量子点的基端状态被量子缺陷捕获，导致缺陷中的另一个电荷载体被激发并返回量子点的基态。我们发现整个过程都在飞秒量表上。更重要的是，该过程与缺陷的深度和物种无关，这与使用非绝热分子动力学模拟的最新理论预测非常吻合。这种类似螺旋螺旋的过程可能会提供对金属卤化物钙钛矿材料中高缺陷耐受性的潜在解释。
We propose Auger-like process assisted by quantum defects in metal halide perovskite quantum dots, where a charge carrier in the ground state of the quantum dot is trapped by quantum defects, resulting in another charge carrier in defect is excited and returns back to the ground state of the quantum dot. We find that the whole process is on the femtosecond scale. More importantly, the process is independent of the depth and species of the defects, which is in good agreement with the recent theoretical prediction using ab initio nonadiabatic molecular dynamics simulation. This Auger-like process may provide a potential explanation of high defect tolerance in metal halide perovskite materials.
