埋底界面修饰对钙钛矿太阳能电池的影响

Impact of the Bottom Interface Modification on the Perovskite Solar Cells

经过十多年的发展,钙钛矿太阳能电池(PSCs)迅速实现了能量转换效率(PCE)从3.8%提高到25.7%的突破,在新一代光伏产业中具有显著的竞争力。钙钛矿太阳能电池的蓬勃发展不仅源于钙钛矿材料具有高光吸收系数、优异的载流子迁移率和可调节的直接带隙,还源于其简便且成本低廉的制造工艺。但是钙钛矿电池内部的缺陷问题,特别是钙钛矿层与底层界面处的缺陷是限制钙钛矿电池效率与稳定性进一步提升的一个瓶颈。通过有效的界面修饰,一方面可以提高钙钛矿的效率,另一方面可以提高器件的稳定性。本文从界面工程对钙钛矿性能的影响出发,着重介绍了埋底界面的修饰工作对钙钛矿电池效率与稳定性的影响,包含电子传输层(ETL)/钙钛矿界面与空穴传输层(HTL)/钙钛矿界面这两部分,通过对这两类埋底界面的有效改性修饰,器件的效率与稳定性显著提高。通过对比分析了各种材料与实验方法对钙钛矿器件整体性能和稳定性的影响,探索了一条有效改善器件性能的路径。最后,本文还对钙钛矿太阳能电池的前景进行了展望。

Perovskite solar cells(PSCs)have experienced significant progress over the past decade,with their power conversion efficiency(PCE)reaching up to 25.7%from an initial 3.8%.Their simple and low-cost manufacturing process,combined with their high light absorption coefficient,excellent carrier mobility,and tunable direct bandgap,has made them highly competitive in the new generation of photovoltaic devices.However,defects within the PSCs,particularly at the interface between the perovskite layer and the bottom layers,remain a bottleneck in further improving their efficiency and stability.Effective interface modification can enhance the efficiency of perovskite and improve the stability of the device.In this paper,we focus on the impact of interface engineering on the performance of PSCs,specifically the modification of the buried interface.We highlight the influence of modifying the interface between the electron transport layer(ETL)/perovskite and the hole transport layer(HTL)/perovskite.By effectively modifying these buried interfaces,we achieve significant improvements in device efficiency and stability.Through comparing different materials and experimental methods,we explore a promising pathway for improving device performance.Finally,we provide an outlook on the future of PSCs.