Rodríguez-Seco Cristina, Méndez Maria, Roldán-Carmona Cristina, Cabau Lydia, Asiri Abdullah M, Nazeeruddin Mohammad Khaja, Palomares Emilio
Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology (ICIQ-BIST), Avda. Països Catalans, 16, E-43007 Tarragona, Spain.
Departament d'Enginyeria Electrònica, Elèctrica i Automàtica, Rovira i Virgili University, Avda. Països Catalans, 26, E-43007 Tarragona, Spain.
ACS Appl Mater Interfaces. 2020 Jul 22;12(29):32712-32718. doi: 10.1021/acsami.0c07586. Epub 2020 Jul 9.
Four hole transport materials (HTMs) based on a benzothiadiazole (BT) central core have been synthesized and successfully employed in triple-cation mixed-halide perovskite solar cells (PSCs), reaching 18.05% solar to energy conversion efficiency. The synthesis of these HTMs follows the push-and-pull approach to modulate the HOMO energy level by combining the BT group as an electron acceptor and diphenyl- and triphenyl-amines as electron donors. Here we show that despite adjusting the HOMO energy level to that of the perovskite is a believed requisite to achieve efficient interfacial hole transfer, additional factors must be taken into account to design novel and efficient HTMs, such as a high hole mobility, solubility in organic solvents, and thermal stability.
基于苯并噻二唑（BT）中心核的四孔传输材料（HTM）已被合成，并成功应用于三阳离子混合卤化物钙钛矿太阳能电池（PSC），实现了18.05%的太阳能到能量转换效率。这些HTM的合成遵循推拉方法，通过将作为电子受体的BT基团与作为电子供体的二苯基和三苯基胺相结合来调节HOMO能级。在这里，我们表明，尽管将HOMO能级调整到与钙钛矿的能级相同被认为是实现高效界面空穴转移的必要条件，但在设计新型高效HTM时，还必须考虑其他因素，如高空穴迁移率、在有机溶剂中的溶解性和热稳定性。
