Efficient Near-Infrared Downconversion and Energy Transfer Mechanism of Ce3+/Yb3+ Codoped Calcium Scandate Phosphor

	Efficient Near-Infrared Downconversion and Energy Transfer Mechanism of Ce3+/Yb3+ Codoped Calcium Scandate Phosphor
	Li, J.; L. Chen; Z. D. Hao; X. Zhang; L. G. Zhang; Y. S. Luo and J. H. Zhang
	2015
发表期刊	Inorganic Chemistry
卷号	54 期号:10 页码:4806-4810
摘要	An efficient near-infrared (NIR) downconversion has been demonstrated in CaSc2O4: Ce3+/Yb3+ phosphor. Doping concentration optimized CaSc2O4: 1%Ce3+/5%Yb3+ shows stronger NIR emission than-doping concentration also optimized typical YAG: 1%Ce3+/5%Yb3+ under 470 nm excitation. The NIIR emission from 900 to 110 nm is enhanced by a factor Of 2.4. In addition; the main emission peak of Yb3+ in the CaSc2O4 around 976 nm, matches better with the optimal spectral response of the c-Si solar cell. The visible and NIR spectra and the decay curves of Ce3+: 5d -> 4f emission were used to demonstrate the energy transfer from Ce3+ ions to Yb3+ ions. The downconversion phenomenon has been observed under the direct excitation. of Ce3+ ions. On analyzing the dependence of energy transfer rate on Yb3+ ion concentration, we reveal that the energy transfer (ET) from Ce3+ ions to Yb3+ ions in CaSc2O4 occurs mainly by the single-step ET process. Considering that the luminescence efficiency of CaSc2O4: Ce3+ is comparable to that of commercial phosphor YAG: Ce3+, the estimated maximum energy transfer efficiency reaches 58% in the CaSc2O4: 1%Ce3+/15% Yb3+ sample, indicating that CaSc2O4: Ce3+/Yb3+ sample has the potential in improving the conversion efficiency of c-Si solar cells.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55306
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li, J.,L. Chen,Z. D. Hao,et al. Efficient Near-Infrared Downconversion and Energy Transfer Mechanism of Ce3+/Yb3+ Codoped Calcium Scandate Phosphor[J]. Inorganic Chemistry,2015,54(10):4806-4810.
APA	Li, J.,L. Chen,Z. D. Hao,X. Zhang,L. G. Zhang,&Y. S. Luo and J. H. Zhang.(2015).Efficient Near-Infrared Downconversion and Energy Transfer Mechanism of Ce3+/Yb3+ Codoped Calcium Scandate Phosphor.Inorganic Chemistry,54(10),4806-4810.
MLA	Li, J.,et al."Efficient Near-Infrared Downconversion and Energy Transfer Mechanism of Ce3+/Yb3+ Codoped Calcium Scandate Phosphor".Inorganic Chemistry 54.10(2015):4806-4810.

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