| Autor: |
Ozerova VV; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Zhidkov IS; Institute of Physics and Technology, Ural Federal University, 19 ul. Mira, 620002 Yekaterinburg, Russia.; M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 ul. S. Kovalevskoi, 620108 Yekaterinburg, Russia., Emelianov NA; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Korchagin DV; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Shilov GV; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Prudnov FA; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Sedov IV; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Kurmaev EZ; Institute of Physics and Technology, Ural Federal University, 19 ul. Mira, 620002 Yekaterinburg, Russia.; M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 ul. S. Kovalevskoi, 620108 Yekaterinburg, Russia., Frolova LA; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia., Troshin PA; Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences, 1 prosp. Semenova, 142432 Chernogolovka, Russia.; Zhengzhou Research Institute, Harbin Institute of Technology, Longyuan East 7th 26, Jinshui District, Zhengzhou 450003, China. |
| Abstrakt: |
The high power-conversion efficiencies of hybrid perovskite solar cells encourage many researchers. However, their limited photostability represents a serious obstacle to the commercialization of this promising technology. Herein, we present an efficient method for improving the intrinsic photostability of a series of commonly used perovskite material formulations such as MAPbI 3 , FAPbI 3 , Cs 0.12 FA 0.88 PbI 3 , and Cs 0.10 MA 0.15 FA 0.75 PbI 3 through modification with octenidine dihydroiodide ( OctI 2 ), which is a widely used antibacterial drug with two substituted pyridyl groups and two cationic centers in its molecular framework. The most impressive stabilizing effects were observed in the case of FAPbI 3 and Cs 0.12 FA 0.88 PbI 3 absorbers that were manifested in significant suppression or even blocking of the undesirable perovskite films' recrystallization and other decomposition pathways upon continuous 110 mW/cm 2 light exposure. The achieved material photostability-within 9000 h for the Oct(FA) n-1 Pb n I 3n+1 (n = 40-400) and 20,000 h for Oct(Cs 0.12 FA 0.88 ) n-1 Pb n I 3n+1 (where n = 40-400) formulations-matches the highest values ever reported for complex lead halides. It is important to note that the stabilizing effect is maintained when OctI 2 is used only as a perovskite surface-modifying agent. Using a two-cation perovskite composition as an example, we showed that the performances of the solar cells based on the developed Oct(Cs 0.12 FA 0.88 ) 399 Pb 400 I 1201 absorber material are comparable to that of the reference devices based on the unmodified perovskite composition. These findings indicate a great potential of the proposed approach in the design of new highly photostable and efficient light absorbers. We believe that the results of this study will also help to establish important guidelines for the rational material design to improve the operational stability of perovskite solar cells. |
