Laser Processing of KBr-Modified SnO 2 for Efficient Rigid and Flexible Ambient-Processed Perovskite Solar Cells
Laser Processing of KBr-Modified SnO 2 for Efficient Rigid and Flexible Ambient-Processed Perovskite Solar Cells
复制标题
KBr 改性 SnO 2 激光加工用于高效刚性和柔性常温加工钙钛矿太阳能电池
作者：
Mo H
结合 KBr 改性和激光加工来制备用于刚性和柔性钙钛矿太阳能电池 (PSC) 的 SnO2 薄膜。 KBr改性有效钝化了SnO2与钙钛矿界面以及钙钛矿薄膜晶界的缺陷。在相对湿度约为 65-75% 的条件下制造的刚性 PSC 的 KBr 改性 SnO2 的功率转换效率 (PCE) 达到 20.14%，而原始 SnO2 薄膜的 PCE 为 18.66%。然后，采用皮秒紫外激光以 100mm s−1 的快速扫描速率在柔性基板上加工 KBr 改性 SnO2 薄膜。激光工艺提高了 PSC 的 PCE 和耐用性。通过激光制造的柔性 PSC 在 1000 次弯曲循环后仍保持其初始 PCE 的 80% 以上，高于通过热板制造的柔性 PSC 在相同的弯曲循环后显示其初始 PCE 的 40%。
A combination of KBr modification and laser processing is utilized to prepare SnO2films for rigid and flexible perovskite solar cells (PSCs). The KBr modification effectively passivates the defects at the interface between SnO2and perovskite as well as grain boundaries of the perovskite film. A power conversion efficiency (PCE) of 20.14% is achieved with the KBr‐modified SnO2for the rigid PSCs fabricated under a relative humidity of around 65–75%, compared to the pristine SnO2films with a PCE of 18.66%. Then, a picosecond ultraviolet laser is employed to process KBr‐modified SnO2films on flexible substrates with a rapid scanning rate of 100 mm s−1. The laser process improves the PCEs and durability of the PSCs. The flexible PSCs fabricated by the laser remain over 80% of their initial PCEs after 1000 bending cycles, higher than those fabricated by the hot plate showing 40% of their initial PCEs after the same bending cycles.