论文标题
量化对电荷载体散射和铅中的迁移率的二极管效应 - 卤化物钙钛矿中的迁移率
Quantifying polaronic effects on charge-carrier scattering and mobility in lead--halide perovskites
论文作者
论文摘要
已经提出，由于电荷载体与晶体晶格之间的相互作用而形成的极性物质对铅 - 北甲基钙钛矿（LHP）的电荷载体动力学具有广泛的影响。许多提案的基本假设是，电荷载体受到将其掺入极化子的散射“保护”的假设。我们通过得出通过表达式来测试该假设，该表达式通过极光子和声音声子以及电离杂质的散射速率，我们对LHPS Mapbi $ _ {3} $，Mapbbr $ _ {3} $ _ {3} $和CSPBI $ _ {3} $中的电子计算。然后，我们使用集合蒙特卡洛方法来计算满足玻尔兹曼方程的电子 - 棕榈分布函数，该方程结合了相同的三种散射机制。通过对带电子进行类似的计算，并将其结果与极地的结果进行比较，我们得出结论，极性形成会影响电荷载体散射率和LHP的有限程度，这与最近文献中的主张相反。
The formation of polarons due to the interaction between charge carriers and the crystal lattice has been proposed to have wide-ranging effects on charge carrier dynamics in lead--halide perovskites (LHPs). The hypothesis underlying many of those proposals is that charge carriers are "protected" from scattering by their incorporation into polarons. We test that hypothesis by deriving expressions for the rates of scattering of polarons by polar-optical and acoustic phonons, and ionised impurities, which we compute for electrons in the LHPs MAPbI$_{3}$ , MAPbBr$_{3}$ and CsPbI$_{3}$. We then use the ensemble Monte Carlo method to compute electron-polaron distribution functions which satisfy a Boltzmann equation incorporating the same three scattering mechanisms. By carrying out analogous calculations for band electrons and comparing their results to those for polarons, we conclude that polaron formation impacts charge-carrier scattering rates and mobilities to a limited degree in LHPs, contrary to claims in the recent literature.
