Spectroscopy and Spectral Analysis, Volume. 32, Issue 10, 2637(2012)
Preparation and Up-Conversion Luminescence Dynamic Process of Yb3+/Er3+ Co-Doped BaGd2ZnO5
Yb3+/Er3+ co-doped BaGd2ZnO5 phosphors were prepared by using the sol-gel method. The up-conversion luminescence powers and efficiencies were measured under different excitation densities. The obtained data showed that the green luminescence power was proportional to the second-order of that of the excitation power under the lower excitation density and linearly in the higher one. The up-conversion mechanism under different excitation power was described by a rate equation. Yb3+/Er3+ co-doped BaGd2ZnO5 was excited by 971 nm LD laser with a square wave signal modulation and the rise and decay processes of green up-conversion luminescence were measured. In a low excitation condition, the rate equation of the energy level 4S3/2 for Er3+ ions was used to fit the green rise and decay processes in order to fix the relevant parameters, and confirm that the population of 4S3/2 energy level of Er3+ ion mainly came from the energy transfer from Yb3+ to Er3+.
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YANG Yan-min, JIAO Fu-yun, SU Hong-xin, LI Zi-qiang, LIU Yun-feng, LI Zhi-qiang, YANG Zhi-ping. Preparation and Up-Conversion Luminescence Dynamic Process of Yb3+/Er3+ Co-Doped BaGd2ZnO5[J]. Spectroscopy and Spectral Analysis, 2012, 32(10): 2637
Received: May. 2, 2012
Accepted: --
Published Online: Nov. 22, 2012
The Author Email: Yan-min YANG (mihuyym@sohu.com)