标题： 界面复合和注入势垒对钙钛矿太阳能电池电学特性的影响 显示英文标题

标题： The Effects of Interfacial Recombination and Injection Barrier on the Electrical Characteristics of Perovskite Solar Cells

摘要： 电荷载流子在钙钛矿太阳能电池（PSCs）中的复合对其电气性能有深远影响，例如开路电压、短路电流、填充因子和最终的功率转换效率。 在本工作中，通过漂移-扩散模型理论研究了注入势垒、复合通道、载流子传输层的掺杂特性以及光强对PSCs性能的影响。 结果表明，由于钙钛矿和载流子传输层界面处的注入势垒，积累的载流子会改变整个PSCs中的电场分布。 因此，在特定的施加电压下会产生零电场，大大增加界面复合，导致电流密度-电压（J-V）曲线出现局部拐点。 本工作通过有针对性地降低注入势垒和界面复合，提供了一种有效提升PSCs效率的策略。 显示英文摘要

摘要： Charge carrier recombination in the perovskite solar cells (PSCs) has a deep influence on the electrical performance, such as open circuit voltage, short circuit current, fill factor and ultimately power conversion efficiency. The impacts of injection barrier, recombination channels, doping properties of carrier transport layers and light intensity on the performance of PSCs are theoretically investigated by drift-diffusion model in this work. The results indicate that due to the injection barrier at the interfaces of perovskite and carrier transport layer, the accumulated carriers modify the electric field distribution throughout the PSCs. Thus, a zero electric field is generated at a specific applied voltage, with greatly increases the interfacial recombination, resulting in a local kink of current density-voltage (J-V) curve. This work provides an effective strategy to improve the efficiency of PSCs by pertinently reducing both the injection barrier and interfacial recombination.