Jing Xu, Yusheng Xu, Jun Yan, Yuting Wu, Yuheng Zhang, Yong Yang, Dacheng Zhou, Zhangwen Long, Qi Wang, JianBei Qiu
Upconversion luminescence plays a crucial role in various technological applications, and among the various valence states of lanthanide elements, Ln3+ has the highest stability. The 4f orbitals of these elements are in a fully empty, semifull, or full state. This special 4f electron configuration allows them to exhibit rich discrete energy levels. However, the 4f-4f transition of Ln3+ rare earth ions itself is prohibited, resulting in a lower luminescence efficiency. This limitation greatly hinders the practical application of upconversion luminescence...
May 2, 2024: ACS Applied Materials & Interfaces