有机卤化物盐对钙钛矿太阳电池器件性能的影响

Effects of Organic Halide Salt on the Performance of Perovskite Solar Cells

摘要:

有机无机杂化钙钛矿已被证明是优良的光吸收材料,可用于高效率光伏领域。增大钙钛矿薄膜的晶粒尺寸和对晶界缺陷的钝化是提高太阳电池性能的重要途径。文章报道了一种简单的缺陷钝化技术,将有机卤化物盐BAI引入钙钛矿的混合阳离子中,以起到增大晶粒和钝化缺陷的作用,使钙钛矿太阳电池的光电转换效率从19.46%提升至21.56%。这种效率的提升是在不损失短路电流和填充因子的情况下,开路电压从1.04V提高到1.11V的结果。这种提升钙钛矿型太阳电池开路电压的方法,为进一步提高钙钛矿型太阳电池的光电性能提供了新的途径。

Abstract:

Organic-inorganic hybrid perovskites have been proven to be a kind of excellent light-absorbing materials for high-efficiency photovoltaic applications. At present, the ways to improve the efficiency of solar cells mainly focus on optimizing the grain morphology and interface modification of perovskite films. In this paper, a simple surface treatment technology is reported to increase the photoelectric conversion efficiency of perovskite solar cells from 19.46% to 21.56%. The improvement in efficiency is the result of increasing the open circuit voltage from 1.04 to 1.11V without sacrificing short circuit current and filling factor. The method of increasing the open-circuit voltage provides a new way to further improve the reliability of perovskite solar cells.