| 초록 |
Colloidal all inorganic cesium lead halide (CsPbX3 where X is Cl, Br, and I) perovskite nanocrystal quantum dots (QDs) have gained considerable interests for light harvesting applications such as solar cells and photocatalysis because of their size-tunable band gap ranged in near infrared (NIR) and defect tolerant electronic structures. Also inexpensive and mass-producible solution processibility make the CsPbX3 NCs more attractive in various applications. However, further progress is strongly impeded due to instability such as aggregation, structural transformation, and easy decomposition. In this talk, novel strategies to significantly enhance the stability of CsPbX3 QDs will be presented. By simply controlling the reaction condition, structural transformation of CsPbX3 NCs are dramatically suppressed. We interpret the dramatically improved air-stability of CsPbX3 QDs in the context of inhibited formation of unstable surfaces in our synthesis with varying reaction conditions. |
