Gao Bo, Li Lianyu, Chen Zongwei, Xu Qun
College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Small. 2024 Mar;20(13):e2308427. doi: 10.1002/smll.202308427. Epub 2023 Nov 15.
Self-trapped excitons (STEs) typically give broadband photoluminescence emission with a large Stokes shift, which is important for the enhancement of the optical properties of materials. Here, low-dimensional La-doped BaTiO nanocrystals with defects are prepared using supercritical CO (SC CO). The generation of the STEs is facilitated by doping La ions and introducing CO pressure, which effectively enhance the luminescence intensity of BaTiO. This discovery shows that the La ion doping concentration can modulate the photoluminescence of BaTiO nanocrystals under pressure. This work deepens the understanding of the influence of rare-earth-doped luminescent materials under pressure and provides insight to improve the capabilities of optical devices.
自陷激子（STEs）通常会产生具有大斯托克斯位移的宽带光致发光发射，这对于增强材料的光学性能很重要。在此，使用超临界CO₂（SC CO₂）制备了具有缺陷的低维镧掺杂钛酸钡纳米晶体。通过掺杂镧离子和引入CO₂压力促进了自陷激子的产生，这有效地增强了钛酸钡的发光强度。这一发现表明，镧离子掺杂浓度可以在压力下调节钛酸钡纳米晶体的光致发光。这项工作加深了对压力下稀土掺杂发光材料影响的理解，并为提高光学器件性能提供了思路。
