首页|Dual-functional POM@IL complex modulate hole transport layer properties and interfacial charge dynamics for highly efficient and stable perovskite solar cells

Dual-functional POM@IL complex modulate hole transport layer properties and interfacial charge dynamics for highly efficient and stable perovskite solar cells

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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.

PolyoxometalatesIonic liquidPerovskite solar cellsEnergy alignmentHumidity stability

Boyuan Hu、Jian Zhang、Yulin Yang、Yayu Dong、Jiaqi Wang、Wei Wang、Kaifeng Lin、Debin Xia

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MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationChina Postdoctoral Science FoundationChina Postdoctoral Science FoundationPostdoctoral Foundation of Heilongjiang ProvincePostdoctoral Foundation of Heilongjiang ProvinceNatural Science Foundation of Heilongjiang Youth Fund

22072034220010502020T1301472020M6810842022M710949LBH-Z19059LBH-Z22106YQ2021B002

2024

10.1016/j.cclet.2023.108933

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(7)