Jegorovė Aistė, Xia Jianxing, Steponaitis Matas, Daskeviciene Maryte, Jankauskas Vygintas, Gruodis Alytis, Kamarauskas Egidijus, Malinauskas Tadas, Rakstys Kasparas, Alamry Khalid A, Getautis Vytautas, Nazeeruddin Mohammad Khaja
Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, Kaunas, 50254 Lithuania.
Institute of Chemical Sciences and Engineering, École Polytechnique Federale de Lausanne (EPFL), Lausanne, 1015 Switzerland.
Chem Mater. 2023 Jul 29;35(15):5914-5923. doi: 10.1021/acs.chemmater.3c00708. eCollection 2023 Aug 8.
A group of small-molecule hole-transporting materials (HTMs) that are based on fluorenylidene fragments were synthesized and tested in perovskite solar cells (PSCs). The investigated compounds were synthesized by a facile two-step synthesis, and their properties were measured using thermoanalytical, optoelectronic, and photovoltaic methods. The champion PSC device that was doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) reached a power conversion efficiency of 22.83%. The longevity of the PSC device with the best performing HTM, , was evaluated in different conditions and compared to that of 2,2',7,7'-tetrakis(-di--methoxyphenylamine)-9,9'-spirobifluorene (spiro-MeOTAD), showing improved stability. This work provides an alternative HTM strategy for fabricating efficient and stable PSCs.
合成了一组基于芴亚基片段的小分子空穴传输材料（HTM），并在钙钛矿太阳能电池（PSC）中进行了测试。所研究的化合物通过简便的两步合成法制备，其性能采用热分析、光电和光伏方法进行测量。掺杂双（三氟甲磺酰）亚胺锂（LiTFSI）的最佳PSC器件的功率转换效率达到了22.83%。对具有最佳性能的HTM的PSC器件在不同条件下的寿命进行了评估，并与2,2',7,7'-四（-二-甲氧基苯胺）-9,9'-螺二芴（spiro-MeOTAD）的寿命进行了比较，结果表明其稳定性有所提高。这项工作为制备高效稳定的PSC提供了一种替代的HTM策略。
