Amino-functionalized Ti3C2 MXene as efficient additive for high-performance methylammonium-free inverted perovskite solar cells

被引：0
作者：
Rossato, Jessica H.H. [1 ,4 ]
Lemos, Hugo G. [1 ,4 ]
Gouvea, Igor Coelho [2 ]
Lounasvuori, Mailis [3 ]
Nandayapa, Edgar [4 ]
Tarasov, Alexander [4 ]
Tomic, Maja [4 ]
Santos, Sydney F. [5 ]
Stavale, Fernando [2 ]
Unger, Eva [4 ,6 ]
Graeff, Carlos F.O. [1 ]
机构：
[1] Department of Physics, School of Sciences, São Paulo State University (UNESP), Av. Eng. Luís Edmundo Carrijo Coube 2085, Bauru
[2] Department of Condensed Matter, Applied Physics and Nanoscience, Brazilian Center for Physics Research (CBPF), R. Dr. Xavier Sigaud 150, Rio de Janeiro
[3] Nanoscale Solid−Liquid Interfaces, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, Berlin
[4] HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Kekuléstraße 5, Berlin
[5] Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André
[6] Department of Chemistry, IRIS and CSMB, Humboldt University Berlin, Zum Großen Windkanal 2, Berlin
来源：
Solar Energy | 2025年 / 298卷
基金：
巴西圣保罗研究基金会;
关键词：
2D materials; Amino functionalization; MXene; Passivation; Perovskite solar cells; Ti[!sub]3[!/sub]C[!sub]2[!/sub]T[!sub]x[!/sub;
D O I：
10.1016/j.solener.2025.113668
中图分类号：
学科分类号：
摘要：
The Ti3C2Tx MXenes are promising additives for perovskite absorber layer due to their changeable work function (WF) and favored affinity to under-coordinated ions. These features can be further tuned by inserting alternative functional groups other than oxygen and fluorine commonly present in these 2D materials. In this work, we use amino functionalized Ti3C2Tx (MXN) as effective additive for a methyl-ammonium free perovskite in p-i-n devices. Amino groups demonstrate to increase the interaction of MXenes with under-coordinated ions and to reduce WF of perovskite films. These features contribute to mitigate non-radiative recombination and to increase charge carrier lifetime and density of photogenerated charges, reflecting in better Voc and Jsc. These improvements lead to devices with optimized efficiency of 21.33 ± 0.31 % (22.84 % for the champion device). The MXN also increase device stability which lasted about four times more under ISOS-L2 protocol. In situ photoluminescence spectrum monitoring during perovskite coating indicates that MXN acts as nucleating sites for bromine-rich intermediate phases at the early stages of the perovskite formation. The MXN also provides additional carrier charges passivating intrinsic defects generally formed by anions diffusion during the halide homogenization process. © 2025 International Solar Energy Society
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