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

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...

Full description

Saved in:
Bibliographic Details
Published in中国物理B：英文版 no. 2; pp. 492 - 498
Main Author 王东丰 张晓丹 刘永娟 吴春亚 张存善 魏长春 赵颖
Format Journal Article
LanguageEnglish
Published 01.02.2013
Subjects
上变频器
上转换材料
六方相
形状
掺镱
水热合成
聚二甲基硅氧烷
非晶硅太阳能电池
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/22/2/027801

Cover

More Information
Summary: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.
Bibliography:Wang Dong-Feng , Zhang Xiao-Dan , Liu Yong-Juan , Wu Chun-Ya , Zhang Cun-Shan , Wei Chang-Chun , Zhao Ying（ 1） 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 ;2） School of Information Engineering. Hebei University of Technology, Tianjin 300071, China ;3） State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
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.
up-conversion,NaYF4,hydrothermal method,up-convertor,solar cells
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/22/2/027801