有机自由基在钙钛矿太阳能电池中的应用

Application of Organic Radicals in Perovskite Solar Cells

钙钛矿太阳能电池(PSCs)由于其优异的光电性能而发展迅猛,其单节电池的能量转化效率(PCE)已经超过了26%,有望成为下一代商业化光伏技术。然而,电池稳定性的问题限制了它们的商业应用。PSCs中大量的缺陷存在将直接影响其性能和稳定性,因此,开发协同提高器件性能与稳定性的光伏材料尤为重要。有机自由基及其聚合物具有开壳型电子结构,在其分子中携带不成对的电子,含有缺电子中心,具有潜在的结合电子的能力,从而有望钝化钙钛矿中的缺陷及提高电荷传输层的导电性能。因此本文主要回顾了近年来有机自由基及其聚合物作为钝化剂和掺杂剂在钙钛矿太阳能电池中的应用,并对其进行了总结与展望。

Perovskite solar cells(PSCs)had been developing rapidly dued to their excellent photovoltaic performance,and their single-cell power conversion efficiency(PCE)had exceeded 26%,which was expected to be the next generation of commercialized photovoltaic technology.However,cell stability issues had limited their commercial application.The presence of a large number of defects in PSCs would directly affect their performance and stability,so it was particularly important to develop photovoltaic materials that synergistically improve device performance and stability.Organic radicals and their polymers had open-shell electronic structures,carry unpaired electrons in their molecules,contain electron-deficient centers,and had the potential to bind electrons,which was expected to passivate defects in the perovskite and improve the electrical conductivity of the charge-transport layer.Therefore,the applications of organic radicals and their polymers as passivators and dopants in perovskite solar cells in recent years were mainly reviewed.