Tunable upconversion luminescence and energy transfer process between Yb3+ and Er3+ in the CaY4F14
作者： Peng Du , Zhiguo Xia , Libing Liao
DOI: 10.1016/J.JLUMIN.2011.09.057
关键词: Ion 、 Dopant 、 Photon upconversion 、 Excitation 、 Energy transfer 、 Two-photon excitation microscopy 、 Absorption (electromagnetic radiation) 、 Luminescence 、 Materials science 、 Analytical chemistry 、 Optoelectronics
摘要: Abstract Yb 3+ /Er codoped CaY 4 F 14 materials with tunable upconversion (UC) emission were prepared by a high temperature solid-state method. Based on the UC luminescence properties investigations, it was found that, under 980 nm excitation, :Yb ,Er showed green–yellow–red changing composition of -Er dopants. It also that green and red emissions originated from two photon processes, ground-state absorption (GSA), excited-state (ESA) energy transfer (ET) processes between Er /Yb ions involved in upconverted mechanism. The measured lifetimes show strong dependence concentration.
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