中国物理B ›› 2013, Vol. 22 ›› Issue (2): 27801-027801.doi: 10.1088/1674-1056/22/2/027801
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
王东丰a, 张晓丹a c, 刘永娟b, 吴春亚a, 张存善b, 魏长春a, 赵颖a
Wang Dong-Feng (王东丰)a, Zhang Xiao-Dan (张晓丹)a c, Liu Yong-Juan (刘永娟)b, Wu Chun-Ya (吴春亚)a, Zhang Cun-Shan (张存善)b, Wei Chang-Chun (魏长春)a, Zhao Ying (赵颖)a
摘要: Hexagonal β-NaYF4 co-doped with Yb3+ and Er3+ is directly synthesized under mild conditions using a hydrothermal method. The variation of the ratio of Ln3+ to F- and ethylenediaminetetraacetic acid (EDTA) causes the shape of the microcrystal to change from microplate to microcolumn. The NaYF4 powder is mixed with polydimethylsiloxane (PDMS) to create an up-converter for thin film amorphous silicon solar cells so as to evaluate the effectiveness of the synthesized material as up-converter. In order to overcome the difficulty in measuring the effectiveness of up-conversion material, a new method of using near infrared illumination to measure the short circuit current densities of solar cells both with and without up-converters is developed. Up-converter with pure hexagonal NaYF4:Yb3+/Er3+microcrystal produces a high current output. Emission intensity data obtained by photoluminescence suggest that pure hexagonal NaYF4:Yb3+/Er3+ microcrystals are more efficient than nanocrystals when used as up-converting phosphors.
中图分类号: (Optical properties of bulk materials and thin films)