Sandoval-Torrientes Rafael, Pascual Jorge, García-Benito Inés, Collavini Silvia, Kosta Ivet, Tena-Zaera Ramón, Martín Nazario, Delgado Juan Luis
IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, C/ Faraday 9, 28049, Madrid, Spain.
IK4-CIDETEC, Parque Tecnológico de San Sebastián, Paseo Miramón 196, 20009, Donostia-San Sebastián, Spain.
ChemSusChem. 2017 May 9;10(9):2023-2029. doi: 10.1002/cssc.201700180. Epub 2017 Apr 5.
A variety of novel chemically modified fullerenes, showing different electron-accepting capabilities, has been synthesized and used to prepare electron transport layer (ETL)-free solar cells based on perovskite/fullerene blends. In particular, isoxazolino[60] fullerenes are proven to be a good candidate for processing blend films with CH NH PbI and obtaining enhanced power conversion efficiency (PCE) ETL-free perovskite solar cells (PSCs), improving the state-of-the-art PCE (i.e., 14.3 %) for this simplified device architecture. A beneficial effect for pyrazolino and methano[60]fullerene derivatives versus pristine [60]/fullerene is also shown. Furthermore, a clear correlation between the LUMO energy level of the fullerene component and the open circuit voltage of the solar cells is found. Apart from the new knowledge on innovative fullerene derivatives for PSCs, the universality and versatility of perovskite/fullerene blend films to obtain efficient ETL-free PSCs is demonstrated.
已经合成了多种具有不同电子接受能力的新型化学修饰富勒烯，并将其用于制备基于钙钛矿/富勒烯混合物的无电子传输层（ETL）太阳能电池。特别地，异恶唑啉[60]富勒烯被证明是用于处理与CH₃NH₃PbI₃的混合膜并获得增强的功率转换效率（PCE）的无ETL钙钛矿太阳能电池（PSC）的良好候选材料，提高了这种简化器件结构的当前最先进的PCE（即14.3％）。还显示了吡唑啉和亚甲基[60]富勒烯衍生物相对于原始[60] /富勒烯的有益效果。此外，发现富勒烯组分的最低未占分子轨道（LUMO）能级与太阳能电池的开路电压之间存在明显的相关性。除了关于用于PSC的创新富勒烯衍生物的新知识之外，还证明了钙钛矿/富勒烯混合膜在获得高效无ETL PSC方面的普遍性和通用性。
