Enhancing IR to NIR upconversion emission in Er3+-sensitized phosphors by adding Yb3+ as a highly efficient NIR-emitting center for photovoltaic applications

doi:10.1039/c9ce01386e

CIOMP OpenIR

	Enhancing IR to NIR upconversion emission in Er3+-sensitized phosphors by adding Yb3+ as a highly efficient NIR-emitting center for photovoltaic applications
	H.Wu; Z.Hao; L.Zhang; X.Zhang; G.-H.Pan; Y.Luo; H.Wu; H.Zhao
	2019
发表期刊	CrystEngComm
ISSN	14668033
卷号	22 期号:2 页码:229-236
摘要	Near-infrared (NIR) to visible upconversion (UC) luminescence in activator Er3+ and sensitizer Yb3+ codoped systems has been extensively studied. In this work, we report the results of Er3+-sensitized Yb3+ NIR UC emission at 1000 nm originating from 2F5/2 2F7/2 transition under infrared (IR) excitation at 1500 nm responsible for Er3+ 4I15/2 4I13/2 transition absorption. The IR to NIR UC is a desirable strategy to increase solar light utilization by reducing the spectral mismatch between the solar spectrum and crystalline silicon (c-Si) solar cells. Er3+ singly doped phosphors are mostly used for realizing the IR to NIR UC emission derived from Er3+ 4I11/2 4I15/2 transition centered also at 1000 nm. The efficiency of this transition, however, is limited by multiphonon relaxation and radiative transition to the 4I13/2 state. Here, Yb3+ ions are codoped in Y2O3:Er3+, and NIR UC emission with the intensity enhanced 1.5 times is achieved due to efficient energy transfer from Er3+ to Yb3+ and highly efficient Yb3+ emission. The influence of the dopants' concentrations on UC dynamics is studied. The optimal concentration under IR excitation is 5% Er3+ and 1% Yb3+. Our results indicate that introducing Yb3+ ions in Er3+ singly doped phosphors may notably improve the IR to NIR UC performance. 2019 The Royal Society of Chemistry.
关键词	Erbium compounds,Energy transfer,Infrared devices,Light emission,Phosphors,Solar cells,Ytterbium compounds
DOI	10.1039/c9ce01386e
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62949
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H.Wu,Z.Hao,L.Zhang,et al. Enhancing IR to NIR upconversion emission in Er3+-sensitized phosphors by adding Yb3+ as a highly efficient NIR-emitting center for photovoltaic applications[J]. CrystEngComm,2019,22(2):229-236.
APA	H.Wu.,Z.Hao.,L.Zhang.,X.Zhang.,G.-H.Pan.,...&H.Zhao.(2019).Enhancing IR to NIR upconversion emission in Er3+-sensitized phosphors by adding Yb3+ as a highly efficient NIR-emitting center for photovoltaic applications.CrystEngComm,22(2),229-236.
MLA	H.Wu,et al."Enhancing IR to NIR upconversion emission in Er3+-sensitized phosphors by adding Yb3+ as a highly efficient NIR-emitting center for photovoltaic applications".CrystEngComm 22.2(2019):229-236.

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