Nakamura Tomoya, Nagai Takabumi, Miyake Yuki, Yamada Takumi, Miura Makoto, Yoshida Hiroyuki, Kanemitsu Yoshihiko, Truong Minh Anh, Murdey Richard, Wakamiya Atsushi
Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
HARVES Co., Ltd Saitama 330-0061 Japan.
Chem Sci. 2024 Dec 23;16(5):2265-2272. doi: 10.1039/d4sc07031c. eCollection 2025 Jan 29.
Although fullerene bisadducts are promising electron-transporting materials for tin halide perovskite solar cells, they are generally synthesized as a mixture of isomeric products that require a complicated separation process. Here, we introduce a phenylene-bridged bis(pyrrolidino)fullerene, Bis-PC, which forms only a single isomer due to geometrical restriction. When used in a tin perovskite solar cell with a PEAFASnI (PEA: phenylethylammonium and FA: formamidinium) light absorption layer, the resulting open-circuit voltage ( ) was 0.78 V, a value higher than that of fullerene monoadducts and comparable to that of the commonly used indene-C bisadduct (ICBA). The performance could be further improved by the composition engineering of perovskite, where the PEA(FAMA)SnI based device (MA: methylammonium) exhibited a photoelectric conversion efficiency of 12.3% with a of 0.86 V. The device with single-isomer Bis-PC shows superior stability to that with mixed-isomer ICBA, retaining its initial performance after 3000 h storage under an inert atmosphere.
尽管富勒烯双加合物是卤化锡钙钛矿太阳能电池很有前景的电子传输材料,但它们通常作为异构体产物的混合物合成,需要复杂的分离过程。在此,我们介绍一种亚苯基桥联的双(吡咯烷基)富勒烯Bis-PC,由于几何限制它只形成单一异构体。当用于具有PEAFASnI(PEA:苯乙铵和FA:甲脒)光吸收层的锡钙钛矿太阳能电池时,得到的开路电压( )为0.78V,该值高于富勒烯单加合物,且与常用的茚-C双加合物(ICBA)相当。通过钙钛矿的组成工程可以进一步提高性能,其中基于PEA(FAMA)SnI的器件(MA:甲铵)表现出12.3%的光电转换效率, 为0.86V。具有单一异构体Bis-PC的器件比具有混合异构体ICBA的器件具有更高的稳定性,在惰性气氛下储存3000小时后仍保持其初始性能。