Enhanced near-infrared quantum cutting in CaMoO4:Yb3+ phosphors induced by doping with Li+ ions for improving solar cells efficiency

Li Li; Xianju Zhou; Xiantao Wei; Chong Geng Ma; M. G. Brik

doi:10.1016/j.matchemphys.2014.06.031

Enhanced near-infrared quantum cutting in CaMoO₄:Yb³⁺ phosphors induced by doping with Li⁺ ions for improving solar cells efficiency

Li Li
, Xianju Zhou
, Xiantao Wei
, Chong Geng Ma
, M. G. Brik^*

^*Corresponding author for this work

Chongqing University of Posts and Telecommunications
University of Science and Technology of China
University of Tartu
Jan Dlugosz University in Czestochowa

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The near-infrared (NIR) quantum cutting (QC) CaMoO₄:Yb ³⁺ phosphors co-doped with Li⁺ ions were synthesized by the sol-gel methods. The dependence of the structure, morphology, photoluminescence (PL) and downconversion (DC) quantum efficiency on the Li ⁺ doping concentration have been investigated in details. It was demonstrated that the CaMoO₄:Yb³⁺ phosphors with appropriate concentration of the Li⁺ ions show improved crystallinity and remarkable increase of the NIR emission from the Yb³⁺ ions, if compared with the Li⁺-free samples. The enhancement of the NIR emission and DC quantum efficiency was suggested to be a consequence of the improved crystallinity and stronger absorption of the host due to the [MoO ₄] tetrahedra distortion induced by the Li⁺ ions. Cooperative energy transfer (CET) from the host to the Yb³⁺ ions is discussed as a possible mechanism for the NIR emission enhancement. Excellent luminescence properties of the Li⁺ doped CaMoO₄:Yb ³⁺ phosphor demonstrate its potential application as a better QC layer to increase the energy conversion efficiency of the Si-based solar cells.

Original language	English
Pages (from-to)	860-866
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	147
Issue number	3
DOIs	https://doi.org/10.1016/j.matchemphys.2014.06.031
Publication status	Published - 15 Oct 2014
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

A. Optical materials
B. Sol-gel growth
C. Photoluminescence spectroscopy
D. Optical properties

Access to Document

10.1016/j.matchemphys.2014.06.031

Cite this

@article{1ba4a3f5072b43fd80e8736467500878,

title = "Enhanced near-infrared quantum cutting in CaMoO4:Yb3+ phosphors induced by doping with Li+ ions for improving solar cells efficiency",

abstract = "The near-infrared (NIR) quantum cutting (QC) CaMoO4:Yb 3+ phosphors co-doped with Li+ ions were synthesized by the sol-gel methods. The dependence of the structure, morphology, photoluminescence (PL) and downconversion (DC) quantum efficiency on the Li + doping concentration have been investigated in details. It was demonstrated that the CaMoO4:Yb3+ phosphors with appropriate concentration of the Li+ ions show improved crystallinity and remarkable increase of the NIR emission from the Yb3+ ions, if compared with the Li+-free samples. The enhancement of the NIR emission and DC quantum efficiency was suggested to be a consequence of the improved crystallinity and stronger absorption of the host due to the [MoO 4] tetrahedra distortion induced by the Li+ ions. Cooperative energy transfer (CET) from the host to the Yb3+ ions is discussed as a possible mechanism for the NIR emission enhancement. Excellent luminescence properties of the Li+ doped CaMoO4:Yb 3+ phosphor demonstrate its potential application as a better QC layer to increase the energy conversion efficiency of the Si-based solar cells.",

keywords = "A. Optical materials, B. Sol-gel growth, C. Photoluminescence spectroscopy, D. Optical properties",

author = "Li Li and Xianju Zhou and Xiantao Wei and Ma, \{Chong Geng\} and Brik, \{M. G.\}",

year = "2014",

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doi = "10.1016/j.matchemphys.2014.06.031",

language = "English",

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journal = "Materials Chemistry and Physics",

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TY - JOUR

T1 - Enhanced near-infrared quantum cutting in CaMoO4:Yb3+ phosphors induced by doping with Li+ ions for improving solar cells efficiency

AU - Li, Li

AU - Zhou, Xianju

AU - Wei, Xiantao

AU - Ma, Chong Geng

AU - Brik, M. G.

PY - 2014/10/15

Y1 - 2014/10/15

N2 - The near-infrared (NIR) quantum cutting (QC) CaMoO4:Yb 3+ phosphors co-doped with Li+ ions were synthesized by the sol-gel methods. The dependence of the structure, morphology, photoluminescence (PL) and downconversion (DC) quantum efficiency on the Li + doping concentration have been investigated in details. It was demonstrated that the CaMoO4:Yb3+ phosphors with appropriate concentration of the Li+ ions show improved crystallinity and remarkable increase of the NIR emission from the Yb3+ ions, if compared with the Li+-free samples. The enhancement of the NIR emission and DC quantum efficiency was suggested to be a consequence of the improved crystallinity and stronger absorption of the host due to the [MoO 4] tetrahedra distortion induced by the Li+ ions. Cooperative energy transfer (CET) from the host to the Yb3+ ions is discussed as a possible mechanism for the NIR emission enhancement. Excellent luminescence properties of the Li+ doped CaMoO4:Yb 3+ phosphor demonstrate its potential application as a better QC layer to increase the energy conversion efficiency of the Si-based solar cells.

AB - The near-infrared (NIR) quantum cutting (QC) CaMoO4:Yb 3+ phosphors co-doped with Li+ ions were synthesized by the sol-gel methods. The dependence of the structure, morphology, photoluminescence (PL) and downconversion (DC) quantum efficiency on the Li + doping concentration have been investigated in details. It was demonstrated that the CaMoO4:Yb3+ phosphors with appropriate concentration of the Li+ ions show improved crystallinity and remarkable increase of the NIR emission from the Yb3+ ions, if compared with the Li+-free samples. The enhancement of the NIR emission and DC quantum efficiency was suggested to be a consequence of the improved crystallinity and stronger absorption of the host due to the [MoO 4] tetrahedra distortion induced by the Li+ ions. Cooperative energy transfer (CET) from the host to the Yb3+ ions is discussed as a possible mechanism for the NIR emission enhancement. Excellent luminescence properties of the Li+ doped CaMoO4:Yb 3+ phosphor demonstrate its potential application as a better QC layer to increase the energy conversion efficiency of the Si-based solar cells.

KW - A. Optical materials

KW - B. Sol-gel growth

KW - C. Photoluminescence spectroscopy

KW - D. Optical properties

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DO - 10.1016/j.matchemphys.2014.06.031

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