Investigation on structure and optical properties of down-conversion aluminosilicate phosphors CaAl2Si2O8: Ce/Tb/Yb

被引：21

作者：

Dai, W. B. ^{[1
]}

Zhou, J. ^{[1
]}

Huang, K. ^{[1
]}

Hu, J. ^{[1
]}

Xu, S. ^{[1
]}

Xu, M. ^{[1
]}

机构：

[1] Wuhan Inst Technol, Sch Mat Sci & Engn, Engn Res Ctr Environm Mat & Membrane Technol Hube, Wuhan 430205, Hubei, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 786卷

关键词：

Energy transfer; Optical properties; Aluminosilicate phosphor; Lanthanon (Ce/Tb/Yb); Si-based solar cells; NEAR-INFRARED EMISSION; ENERGY-TRANSFER; SOLAR-CELLS; CE3+; ENHANCEMENT;

D O I：

10.1016/j.jallcom.2019.02.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of Ce3+, Tb3+ and Yb-3(+) tri-doped feldspar CaAl2Si2O8 (CASO) phosphors have been successfully synthesized at similar to 1350 degrees C under reducing atmosphere. Optical properties of these phosphors have been investigated as a function of doping concentrations by using fluorescence spectra and decay lifetime analysis in detail. The XRD patterns and structure refinements indicate that the dopants do not change the phase structure of host lattice. For Ce3+/Tb3+/Yb3+ all occupied at Ca2+ sites, charge compensation requires cationic vacancies (V-Ca(//)) to maintain electrical neutrality instead of oxygen at interstitial site (O-i(2)- ) because the phosphors were synthesized under reducing atmosphere. The near ultraviolet (n-UV) converted to near-infrared (NIR) emission of the aluminosilicate phosphors have achieved via Ce3+ -> Tb3+ -> Yb3+ resonant energy transfer (ET), enabling their potential application as down-conversion (DC) converter in Si-based solar cells. The role of Tb3+ is acting as ET bridge to connect Ce3+ and Yb3+ ion pairs. Through adjusting optimal doping concentrations, these NIR DC phosphors can exhibit excitation bands in n-UV region and strong NIR emissions. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：662 / 667

页数：6

共 26 条

[1] INVESTIGATIONS OF VALENCE CHANGE OF TB IONS IN ZRO2-TB4O7 MIXED CONDUCTOR USING XANES MEASUREMENTS [J].