Tsai, C.等人制备出一种双官能铵阳离子，2-羟基乙基铵（HEA+）掺杂的甲脒（FA+）锡基钙钛矿（HEAxFA1-xSnI3; x = 0-1）吸光层的碳基太阳能电池。结果发现HEA+在控制晶体结构方面起着关键作用，电池效率为3.9%。 Tsai, C.-M., Lin, Y.-P. et al. Control of Crystal Structures and Optical Properties with Hybrid Formamidinium and 2-Hydroxyethylammonium Cations for Mesoscopic Carbon-Electrode Tin-Based Perovskite Solar Cells. ACS Energy Lett. Doi:10.1021/acsenergylett.8b01046 .https://doi.org/10.1021/acsenergylett.8b01046.