| 초록 |
In this work, we prove that designing organic hole-transporting materials (HTMs) to have the enhanced property at their photo-excited states could be a new methodology to improve their performances for the high efficiency p-i-n perovskite solar cells (PSCs). Especially, we focus on their transition dipole moment variation at the photoexcitation, which can intensify this feature by the excited-state intramolecular proton transfer process, for the high performance PSCs. Following the design rules, organic HTMs can be designed to have high dipole moment at the excited states, and this property can be preserved during the solar cell operation due to their extended lifetime by the proton transfer process, consequently improving the charge recombination and extraction property of PSC devices. Moreover, their UV-filtering ability is beneficial to enhance the photostability of PSCs. We believe that our suggestion could be a new strategy to design efficient HTMs for high performance PSCs. |
