Shape-controlled tunable homochromatic luminescence and inner photoelectric effect of hexagonal Na1.23Ca0.12Y1.28Er0.24F6 phosphors.
Shape-controlled tunable homochromatic luminescence and inner photoelectric effect of hexagonal Na1.23Ca0.12Y1.28Er0.24F6 phosphors.
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DOI：
10.1039/c2cp40523g
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
Xiangfu Wang;Xiaohong Yan;Tao Wang;Yanyan Bu;C. Kan;Yuan Chen
中科院分区：
文献类型：
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作者：
Xiangfu Wang;Xiaohong Yan;Tao Wang;Yanyan Bu;C. Kan;Yuan Chen
首次水热合成了六方结构的Na1.23Ca0.12Y1.28Er0.24F6纳米盘、微管和纳米棒。随时间变化的形貌演化表明，所得到的纳米盘，微管，和纳米棒的溶解-重构形成机制的合成。借助980 nm半导体激光器，分别激发六方晶系Na 1.23 Ca 0.12 Y 1.28 Er 0.24 F6纳米盘、微管和纳米棒，观察到可调谐单色发光。同时，在980 nm激发下，六方晶系的Na 1. 23 Ca 0. 12 Y1. 28 Er 0. 24 F6纳米盘、微管和纳米棒都出现了内光电效应.通过改变Na1.23Ca0.12Y1.28Er0.24F6荧光粉的形貌，实现了单色发光和内光电效应的同时控制。
Novel hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods were synthesized hydrothermally for the first time. Time-dependent morphology evolution showed that the resulting nanodisks, microtubes, and nanorods were synthesized by a dissolution-reconstruction formation mechanism. With the help of a 980 nm semiconductor laser, tunable homochromatic luminescence was observed by exciting single hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods, respectively. Simultaneously, the inner photoelectric effect was witnessed in the hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods under 980 nm excitation. We attributed anomalous inner photoelectric current to the presence of a laser stepped resonant excitation energy migration in the Na1.23Ca0.12Y1.28Er0.24F6 matrix when a laser was applied to it. Simultaneous control of homochromatic luminescence and inner photoelectric effect were achieved by modifying morphological shapes of single Na1.23Ca0.12Y1.28Er0.24F6 phosphors.