Fu Jie, Zhang Guoguo, Zou Hanyu, Wang Chengzhi, Genevois Cécile, Veron Emmanuel, Allix Mathieu, Li Jianqiang
Sinopec Beijing Research Institute of Chemical Industry, Beijing, 100013, China.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
Nanoscale. 2025 Jul 24;17(29):17127-17136. doi: 10.1039/d5nr01725d.
All-inorganic perovskite nanocrystals are considered promising candidates for applications in optoelectronics including light-emitting diodes (LEDs), phosphors, solar cells and photodetectors, . However, all-inorganic perovskite nanocrystals mainly exist in the form of powders and single crystals. The former often suffers from limited chemical stability and large dependence on matrix materials, while the latter typically involves long-term and complex preparation processes. In this paper, we report the successful synthesis of a transparent GdAlO (GdAP)-based perovskite nanocrystalline ceramic for the first time using a low-temperature (1000 °C) glass crystallization of 74 mol% AlO-26 mol% GdO bulk glass. And, among which the bulk glass is prepared by a containerless solidification process. The resulting ceramics exhibit a biphasic nanostructure composed of GdAP main phase (76.9 wt%) and AlO secondary phase (23.1 wt%). The fully dense GdAP-AlO nanoceramics demonstrate a good transmittance of 77%@780 nm and an excellent mechanical property (hardness is 24 GPa). When doped with Tb, the transparent Tb:GdAP-AlO perovskite nanocrystalline ceramics can be efficiently excited under ultraviolet radiation at 369 nm to emit green fluorescence at 544 nm. Moreover, XEL spectra show that the luminous intensity of transparent 7%Tb:GdAP-AlO perovskite nanocrystalline ceramic is approximately 4.5 times higher than that of the commercial BGO single crystal. Additionally, the light yield of transparent 7%Tb:GdAP-AlO perovskite nanocrystalline ceramics is calculated to be approximately 45 000 ph per MeV. Therefore, the transparent GdAP-AlO perovskite nanocrystalline ceramics presented in this paper exhibit good transmittance, excellent mechanical properties, and promising X-ray detection performance, demonstrating wide potential applications in a wide range of optical fields, including optical windows, lenses, scintillators, X-ray detection imaging, and phosphors.
全无机钙钛矿纳米晶体被认为是用于包括发光二极管（LED）、磷光体、太阳能电池和光电探测器在内的光电子学应用的有前途的候选材料。然而，全无机钙钛矿纳米晶体主要以粉末和单晶的形式存在。前者通常化学稳定性有限且对基体材料依赖性大，而后者通常涉及长期且复杂的制备过程。在本文中，我们首次报道了使用74摩尔%AlO - 26摩尔%GdO块状玻璃的低温（1000℃）玻璃结晶成功合成了一种基于透明钆铝酸盐（GdAP）的钙钛矿纳米晶陶瓷。并且，其中块状玻璃是通过无容器凝固工艺制备的。所得陶瓷呈现出由GdAP主相（76.9重量%）和AlO次相（23.1重量%）组成的双相纳米结构。完全致密的GdAP - AlO纳米陶瓷在780nm处显示出77%的良好透过率和优异的机械性能（硬度为24GPa）。当掺杂Tb时，透明的Tb:GdAP - AlO钙钛矿纳米晶陶瓷在369nm的紫外辐射下能被有效激发，在544nm处发射绿色荧光。此外，X射线激发发光（XEL）光谱表明，透明的7%Tb:GdAP - AlO钙钛矿纳米晶陶瓷的发光强度约为商用BGO单晶的4.5倍。另外，透明的7%Tb:GdAP - AlO钙钛矿纳米晶陶瓷的光产额经计算约为每兆电子伏特45000光子。因此，本文所呈现的透明GdAP - AlO钙钛矿纳米晶陶瓷具有良好的透过率、优异的机械性能和有前景的X射线探测性能，在包括光学窗口、透镜、闪烁体、X射线探测成像和磷光体等广泛的光学领域展示出广阔的潜在应用前景。
