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首页> 外文期刊>Optical Materials >Green up-converted luminescence in (Er3+-Yb3+) co-doped LiNbO3 crystals
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Green up-converted luminescence in (Er3+-Yb3+) co-doped LiNbO3 crystals

机译：（Er3 + -Yb3 +）共掺杂的LiNbO3晶体中的绿色上转换发光

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摘要

Er3+ doped and (Er3+-Yb3+) co-doped LiNbO3 (LN) crystals grown by the Czochralski method are investigated by photoluminescence spectroscopy. Green up-converted luminescence is observed in Er3+ doped LN crystals under 980 nm excitation. This is explained by an energy transfer between two neighboring Er3+ ions. In (Er3+, Yb3+) co-doped LN crystals, the intensity of the green up-converted luminescence can be further enhanced suggesting that Yb3+ ions also contribute to the up-conversion process. Time resolved photoluminescence measurements clearly demonstrate that an efficient energy transfer occurs between Yb3+ and Er3+ ions. A theoretical model taking into account the contribution of both Er3+-Er3+ pairs and Yb3+-Er3+ pairs is able to describe correctly the decay of the up-converted luminescence. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过光致发光光谱研究了通过切克劳斯基方法生长的掺Er3 +和（Er3 + -Yb3 +）共掺杂的LiNbO3（LN）晶体。在980 nm激发下，在掺Er3 +的LN晶体中观察到绿色上转换的发光。这可以通过两个相邻的Er3 +离子之间的能量转移来解释。在（Er3 +，Yb3 +）共掺杂的LN晶体中，绿色上转换发光的强度可以进一步增强，这表明Yb3 +离子也有助于上转换过程。时间分辨的光致发光测量清楚地表明，Yb3 +和Er3 +离子之间发生了有效的能量转移。考虑到Er3 + -Er3 +对和Yb3 + -Er3 +对的贡献的理论模型能够正确描述上转换发光的衰减。 （C）2016 Elsevier B.V.保留所有权利。

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