Broadband down-conversion in Bi3+–Yb3+-codoped yttrium and yttrium–aluminum oxides
Broadband down-conversion in Bi3+–Yb3+-codoped yttrium and yttrium–aluminum oxides
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DOI：
10.1016/j.matchemphys.2013.09.044
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发表时间：
2014-01
影响因子：
4.6
通讯作者：
Y. Zhydachevskii;L. Lipińska;M. Baran;M. Berkowski;A. Suchocki;A. Reszka
中科院分区：
文献类型：
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作者：
Y. Zhydachevskii;L. Lipińska;M. Baran;M. Berkowski;A. Suchocki;A. Reszka
从寻找适合于提高硅太阳电池效率的材料的角度，比较研究了Bi3+-Yb3+共掺的Y2O3和不同的Y3Al5O12、YAlO3和Y4Al2O9的宽带下转换过程。采用溶胶-凝胶法合成了纳米粉末状纳米材料，并用X射线粉末衍射、扫描电子显微镜和发光技术对其进行了表征。对所研究材料的相对下转换效率进行了估算。结果表明，Yb3+离子的最佳浓度为2-4at.%，Bi3+离子的最佳浓度为1at.%左右。当Yb3+离子在紫外光中被激发为Bi3+离子吸收时，这样的掺杂量在近红外区提供了最高的发射强度。对硅太阳电池增强材料的研究前景进行了展望。
Comparative study of the broadband down-conversion processes in Bi3+–Yb3+-codoped yttrium oxide (Y2O3) and various yttrium–aluminum oxides (Y3Al5O12, YAlO3and Y4Al2O9) has been performed from the point of view of search for materials suitable for enhancement of efficiency of silicon solar cells. The studied materials in the form of nanopowders have been synthesized by sol–gel method and characterized by X-ray powder diffraction, scanning electron microscopy and luminescence techniques. Relative down-conversion efficiency for studied materials has been estimated. It was shown that optimal concentration of Yb3+ions should be 2–4 at.% simultaneously with Bi3+ions in the amount of about 1 at.%. Such dopants content provides the highest emission intensity of Yb3+ions in near-infrared when excited into Bi3+ions absorption in ultraviolet. Perspectives of the studied materials for enhancement of silicon solar cells are discussed.