| 초록 |
In this report, we demonstrate size and shape controlled synthesis of lead-free cesium bismuth bromide (Cs3Bi2Br9) perovskite nanocrystals (NCs). The Cs3Bi2Br9 nanocrystals are synthesized via injection-free, heating up method in presence of high boiling point solvent mixture. Size and shape of Cs3Bi2Br3 NCs are readily controlled by changing reaction condition. Upon heating, sequential phase evolution are observed, which is characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoemission spectroscopy (XPS) measurements. In addition, we characterize absorption and photoluminescence properties of Cs3Bi2Br3 NCs investigating size dependent optical properties. |
