Near-infrared luminescence and energy transfer processes in LaOF:Nd3+, Yb3+

作者：Shi, Shiman; Shi, Qiufeng^*; Cui, Cai'e; Wang, Lei; Tian, Yue; Huang, Ping^*

来源：RSC Advances, 2016, 6(94): 91127-91132.

DOI：10.1039/c6ra19953d

• EMISSION
• EFFICIENT

Nd3+ and Yb3+ singly and codoped samples of LaOF were prepared by a hydrothermal synthesis method and the phase purity of samples was examined by X-ray powder diffraction. The Yb3+ concentration dependence of luminescence and decay times of LaOF:Nd3+, Yb3+ were investigated. Cross-relaxation energy transfer from Nd3+ (D-4(3/2) -> (4)G(5/2)) to Yb3+ (F-2(7/2) -> F-2(5/2)) was confirmed not only based on the excitation spectra, but also by the decay properties of the Nd3+ D-4(3/2) state. However, the dominant process was multi-phonon relaxation from Nd3+ higher levels to F-4(3/2), followed by energy transfer to Yb3+ F-2(5/2). In addition, host energy transfer to Yb3+ and back energy transfer from Yb3+ (F-2(5/2) -> F-2(7/2)) to Nd3+ (I-4(9/2) -> F-4(3/2)) were also revealed. The present study could be rewarding in the design of efficient spectral converters applied in silicon-based solar cells.

• 出版日期2016
• 单位太原理工大学