| 초록 |
CsPbBr3 perovskite quantum dots (QDs) have been reported outstanding optical properties such as broad absorption, narrow emission spectrum as well as high absolute photoluminescence quantum yield (PLQY). However, the experimental environment has to be controlled with low humidity like a glovebox. Because CsPbBr3 perovskite QDs are known to degrade and show a rapid loss of emission intensity under ambient conditions. Contrary to general observation, a few reports on perovskite solar cells reported improved crystallization and stability by using water. In this work, we have found that an appropriate amount of water makes improved PLQY and stable CsPbBr3 perovskite QDs. In the results, PLQY of water added CsPbBr3 perovskite QDs enhanced over 90% and their stability retained even after the 35days. Moreover, water added CsPbBr3 perovskite QDs show much narrower full width at half maximum(FWHM) than general CsPbBr3 perovskite QDs. |
