Abstract
The severe interfacial charge recombination as well as the stability issues brought by the Li-TFSI still hinder the commercialization of high-performance perovskite solar cells(PSCs).Here,a polyoxometalates(POMs)-based complex,POM@ionic liquid(IL),is synthesized and applied as an effective additive that si-multaneously enhances the performance and stability of PSCs.The interactions between POM@IL complex and Li-TFSI inhibit the aggregation of Li-TFSI.The synergistic oxidation of POM@IL complex and Li-TFSI towards 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene(Spiro-OMeTAD)effectively enhances the electrical properties of hole transport layer film and the photovoltaic performances of PSCs.The champion device modified with the POM@IL complex yields an excellent power conversion efficiency(PCE)of 22.73% .Moreover,the incorporation of POM@IL improves the humidity stability of PSCs.After storing under high humidity conditions(25℃,60% RH)for 1200 h,the POM@IL modified device retained a remarkable 81.2% of its initial PCE.This work provides new insight into constructing POMs-based ma-terials for high-performance photovoltaic devices.
基金项目
National Natural Science Foundation of China(22072034)
National Natural Science Foundation of China(22001050)
China Postdoctoral Science Foundation(2020T130147)
China Postdoctoral Science Foundation(2020M681084)
China Postdoctoral Science Foundation(2022M710949)
Postdoctoral Foundation of Heilongjiang Province(LBH-Z19059)
Postdoctoral Foundation of Heilongjiang Province(LBH-Z22106)
Natural Science Foundation of Heilongjiang Youth Fund(YQ2021B002)
维普
万方数据