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Hydrothermal synthesis of hexagonal-phase NaYF4:Er,Yb with different shapes for application as photovoltaic up-converters

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【作者】 王东丰； 张晓丹； 刘永娟； 吴春亚； 张存善； 魏长春； 赵颖；

【Author】 Wang Dong-Feng a),Zhang Xiao-Dan a)c),Liu Yong-Juan b),Wu Chun-Ya a),Zhang Cun-Shan b),Wei Chang-Chun a),and Zhao Ying a) a)Institute of Photo-electronics Thin Film Devices and Technique of Nankai University,Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin,Key Laboratory of Photo-electronic Information Science and Technology(Nankai University),Ministry of Education,Tianjin 300071,China b)School of Information Engineering.Hebei University of Technology,Tianjin 300071,China c)State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310027,China

【机构】 Institute of Photo-electronics Thin Film Devices and Technique of Nankai University,Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin,Key Laboratory of Photo-electronic Information Science and Technology(Nankai University),Ministry of Education； State Key Laboratory of Silicon Materials,Zhejiang University； School of Information Engineering.Hebei University of Technology；

【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 an 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.An 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.

【Abstract】 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 an 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.An 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.

【关键词】 up-conversion； NaYF4； hydrothermal method； up-convertor； solar cells；
【Key words】 up-conversion； NaYF4； hydrothermal method； up-convertor； solar cells；
【基金】 Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00705,2011CBA00706,and 2011CBA00707);the National Natural Science Foundation of China (Grant No. 60976051);the Science and Technology Support Program of Tianjin,China (Grant No. 12ZCZDGX03600);the Program for New Century Excellent Talents in University of China (Grant No. NCET-08-0295)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2013年02期
  • 【分类号】TM921.51
  • 【下载频次】87
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