| 초록 |
insulating polymers as a host matrix are intrinsically vulnerable to thermal stresses Here, CsPbBr3/Al2O3 nanocomposite film is developed. CsPbBr3/Al2O3 powders with bright and saturated green emission are synthesized. Then, the ceramic composite powder comprising monoclinic CsPbBr3 nanocrystals supported on submicron α-Al2O3 particles is successfully transformed to a film-type by aerosol deposition, which enables a nonsolvent-induced process at room temperature. The films show a pure green spectrum with a narrow full width at half maximum of 17 nm, long-term stability at 150 °C for over 20 d, and an absolute photoluminescence quantum yield of 8%–15%. The deposited film can be employed in useful applications such as down-converting materials for an LCD backlight with a wide-color gamut of 89.2% in Rec. 2020, flexible ceramic composite films, multilayer films, patterning of surfaces for an advanced color filter array, and deposition on curved substrates toward diverse display fields. |
