Center for Energy Science and Technology (CEST), Skolkovo Institute of Science and Technology, Nobel St. 3, 143026 Moscow, Russia.
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, FRC PCPMC RAS, Academician Semenov Avenue 1, 142432 Chernogolovka, Russia.
Int J Mol Sci. 2022 Nov 2;23(21):13375. doi: 10.3390/ijms232113375.
Perovskite solar cells (PSCs) currently reach high efficiencies, while their insufficient stability remains an obstacle to their technological commercialization. The introduction of hole-transport materials (HTMs) into the device structure is a key approach for enhancing the efficiency and stability of devices. However, currently, the influence of the HTM structure or properties on the characteristics and operational stability of PSCs remains insufficiently studied. Herein, we present four novel push-pull small molecules, , with alternating thiophene and benzothiadiazole or fluorine-loaded benzothiadiazole units, which contain branched and linear alkyl chains in the different positions of terminal thiophenes to evaluate the impact of HTM structure on PSC performance. It is demonstrated that minor changes in the structure of HTMs significantly influence their behavior in thin films. In particular, organizes into highly ordered lamellar structures in thin films, which proves to be crucial in boosting the efficiency and stability of PSCs. The presented results shed light on the crucial role of the HTM structure and the morphology of films in the performance of PSCs.
钙钛矿太阳能电池 (PSCs) 目前已达到较高的效率，但稳定性不足仍是其实现技术商业化的障碍。在器件结构中引入空穴传输材料 (HTMs) 是提高器件效率和稳定性的关键方法。然而，目前对于 HTM 结构或性质对 PSCs 特性和工作稳定性的影响研究还不够充分。在此，我们提出了四个新型推拉小分子 ， ，其交替含有噻吩和苯并噻二唑或含氟苯并噻二唑单元，并在末端噻吩的不同位置含有支链和直链烷基链，以评估 HTM 结构对 PSC 性能的影响。结果表明，HTM 结构的微小变化会显著影响其在薄膜中的行为。特别是 ，在薄膜中形成高度有序的层状结构，这对提高 PSCs 的效率和稳定性至关重要。所呈现的结果阐明了 HTM 结构和薄膜形态在 PSCs 性能中的关键作用。
