Reversible up-conversion luminescence modulation based on UV-VIS light-controlled photochromism in Er3+ doped Sr2SnO4
Reversible up-conversion luminescence modulation based on UV-VIS light-controlled photochromism in Er3+ doped Sr2SnO4
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DOI：
10.1039/c8tc04725a
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发表时间：
2018-12
影响因子：
6.4
通讯作者：
Yuanyuan Zhang;L. Luo;Kaixuan Li;Weiping Li;Yafei Hou
中科院分区：
文献类型：
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作者：
Yuanyuan Zhang;L. Luo;Kaixuan Li;Weiping Li;Yafei Hou
具有响应外部刺激的可逆发光调制的上转换荧光粉在光学存储器件、光电开关和光学传感中具有巨大的应用潜力。出于可及性和控制方便性的考虑，光刺激是实现调制的最佳方法。在这里，我们报道了一种新型荧光粉Sr2SnO4:Er3+，当将Er3+离子引入Sr2SnO4主体时，它表现出上转换发光和可逆光致变色特性。基于可逆光致变色反应，上转换发光可以通过交替的紫外光（270-310 nm）和可见光（440-520 nm）照射进行可逆调制。 290 和 460 nm 被发现是控制光致变色反应和发光调制的最有效的波长。光致变色程度和发光调制比取决于掺杂的Er3+离子浓度。 Sr2SnO4:0.005Er3+ 实现了较大的发光减少率 (84.9%) 和增加率 (266.0%)。此外，还研究了光致变色和发光调制的机制。
Up-conversion phosphors with reversible luminescence modulation in response to external stimuli have great potential for applications in optical memory devices, photoswitches and optical sensing. For the accessibility and the controlling convenience, light stimulation is an optimal method to realize the modulation. Here, we report a novel phosphor Sr2SnO4:Er3+, which shows both up-conversion luminescence and reversible photochromic properties upon introducing Er3+ ions into the Sr2SnO4 host. The up-conversion luminescence can be reversibly modulated by alternating ultraviolet light (270–310 nm) and visible light (440–520 nm) irradiation based on the reversible photochromic reaction. 290 and 460 nm are found to be the most efficient wavelengths to control the photochromic reaction and luminescence modulation. And the photochromic degree and luminescence modulation ratio are dependent on the doped Er3+ ion concentration. Large luminescence decrease (84.9%) and increase ratios (266.0%) are achieved in Sr2SnO4:0.005Er3+. Furthermore, the mechanisms of photochromism and luminescence modulation are investigated.