含CsPbBr3钙钛矿量子点的硅酸盐基氟氧化物玻璃陶瓷的制备及其发光性能

Preparation and Luminescence Properties of Silicate-based Oxyfluoride Glass Ceramic Containing CsPbBr3 Perovskite Quantum Dots

采用热处理烧结方法制备了含CsPbBr3钙钛矿量子点的硅酸盐基氟氧化物玻璃陶瓷(SiO2-Al2O3-Li2O-AlF3-LiF)。通过X射线衍射分析了玻璃的自析晶现象与量子点生长之间的关系;TEM透射电镜分析了量子点的形貌特征;荧光光谱、吸收光谱和CIE色坐标等表征分析了量子点的发光特性。结果表明,最佳条件制备得到的含CsPbBr3量子点的玻璃陶瓷材料可实现512 nm强绿光发射,半峰宽22.80 nm。将该玻璃陶瓷与365 nm紫外芯片封装构建绿光发光二极管(LED),有望替代绿色荧光粉成为新型固体发光领域的关键材料。

With an elaborate design,the silicate-based oxyfluoride glass ceramic with the composition of SiO2-Al2O3-Li2O-AlF3-LiF containing CsPbBr3 perovskite quantum dots was obtained by the re-heat treatment method.Impressively,controllable crystallization of the glass matrix and CsPbBr3 nanocrystal taking place in the glass ceramic were investigated by XRD.The microstructure characterizations of the CsPbBr3 nanocrystal were tested by TEM.The PL spectra,absorption spectra and CIE color coordinates were used to analyze the luminescence properties of CsPbBr3 quantum dots.As a result,the PL of the CsPbBr3 glass ceramic under optimum conditions shows robust green emission at 512 nm with narrow full width at half maximum(FWHM of 22.80 nm).The light emitting diode(LED)which was encapsulated by coupling the green-emitting CsPbBr3 glass ceramic with a 365 nm ultraviolet chip is expected to replace the traditional green phosphor as the key material in the field of new solid luminescent materials.