Enhancement of upconversion luminescence of Y2O 3:Er3+ nanocrystals by codoping Li+-Zn 2+

Huijuan Liang; Yangdong Zheng; Guanying Chen; Li Wu; Zhiguo Zhang; Wenwu Cao

doi:10.1016/j.jallcom.2010.09.044

Enhancement of upconversion luminescence of Y₂O ₃:Er³⁺ nanocrystals by codoping Li⁺-Zn ²⁺

Huijuan Liang
, Yangdong Zheng
, Guanying Chen
, Li Wu
, Zhiguo Zhang
, Wenwu Cao

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

67 Scopus citations

Abstract

The upconversion (UC) luminescence in sol-gel synthesized Li⁺, Zn²⁺, or Li⁺-Zn²⁺ codoped Y₂O ₃:Er³⁺ nanocrystals were investigated under the excitation of a 970 nm diode laser. Compared to undoped Y₂O₃:Er ³⁺ samples, proper doping of Li⁺-Zn²⁺ leads to an drastic increase of the UC luminescence centered at 560 nm by a factor of 28. The UC luminescence enhancement is a result of the increased lifetime of the intermediate state ⁴I_11/2 (Er). The intensity ratio of the green over red emissions (green/red) is also affected by the codoping of Zn²⁺, Li⁺ and Li⁺-Zn²⁺ ions. Our results demonstrated that the Li⁺-Zn²⁺ codoping in Y ₂O₃:Er³⁺ phosphors produced remarkable enhancement of the UC luminescence and green/red ratio, making this nanocrystal a promising candidate for photonic and biological applications.

Original language	English (US)
Pages (from-to)	409-413
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.09.044
State	Published - Jan 12 2011

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.09.044

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title = "Enhancement of upconversion luminescence of Y2O 3:Er3+ nanocrystals by codoping Li+-Zn 2+",

abstract = "The upconversion (UC) luminescence in sol-gel synthesized Li+, Zn2+, or Li+-Zn2+ codoped Y2O 3:Er3+ nanocrystals were investigated under the excitation of a 970 nm diode laser. Compared to undoped Y2O3:Er 3+ samples, proper doping of Li+-Zn2+ leads to an drastic increase of the UC luminescence centered at 560 nm by a factor of 28. The UC luminescence enhancement is a result of the increased lifetime of the intermediate state 4I11/2 (Er). The intensity ratio of the green over red emissions (green/red) is also affected by the codoping of Zn2+, Li+ and Li+-Zn2+ ions. Our results demonstrated that the Li+-Zn2+ codoping in Y 2O3:Er3+ phosphors produced remarkable enhancement of the UC luminescence and green/red ratio, making this nanocrystal a promising candidate for photonic and biological applications.",

author = "Huijuan Liang and Yangdong Zheng and Guanying Chen and Li Wu and Zhiguo Zhang and Wenwu Cao",

note = "Funding Information: The work is supported by the SIDA Asian-Swedish Research Partnership Program, the 863 Hi-Tech Research and Development Program of People's Republic of China, the Harbin City Bureau of Science and Technology Key project fund (2009AA3BS131) and the Harbin Institute of Technology through Programs for Interdisciplinary Basic Research on Science, Engineering and Medicine. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2011",

month = jan,

day = "12",

doi = "10.1016/j.jallcom.2010.09.044",

language = "English (US)",

volume = "509",

pages = "409--413",

journal = "Journal of Alloys and Compounds",

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T1 - Enhancement of upconversion luminescence of Y2O 3:Er3+ nanocrystals by codoping Li+-Zn 2+

AU - Liang, Huijuan

AU - Zheng, Yangdong

AU - Chen, Guanying

AU - Wu, Li

AU - Zhang, Zhiguo

AU - Cao, Wenwu

N1 - Funding Information: The work is supported by the SIDA Asian-Swedish Research Partnership Program, the 863 Hi-Tech Research and Development Program of People's Republic of China, the Harbin City Bureau of Science and Technology Key project fund (2009AA3BS131) and the Harbin Institute of Technology through Programs for Interdisciplinary Basic Research on Science, Engineering and Medicine. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/1/12

Y1 - 2011/1/12

N2 - The upconversion (UC) luminescence in sol-gel synthesized Li+, Zn2+, or Li+-Zn2+ codoped Y2O 3:Er3+ nanocrystals were investigated under the excitation of a 970 nm diode laser. Compared to undoped Y2O3:Er 3+ samples, proper doping of Li+-Zn2+ leads to an drastic increase of the UC luminescence centered at 560 nm by a factor of 28. The UC luminescence enhancement is a result of the increased lifetime of the intermediate state 4I11/2 (Er). The intensity ratio of the green over red emissions (green/red) is also affected by the codoping of Zn2+, Li+ and Li+-Zn2+ ions. Our results demonstrated that the Li+-Zn2+ codoping in Y 2O3:Er3+ phosphors produced remarkable enhancement of the UC luminescence and green/red ratio, making this nanocrystal a promising candidate for photonic and biological applications.

AB - The upconversion (UC) luminescence in sol-gel synthesized Li+, Zn2+, or Li+-Zn2+ codoped Y2O 3:Er3+ nanocrystals were investigated under the excitation of a 970 nm diode laser. Compared to undoped Y2O3:Er 3+ samples, proper doping of Li+-Zn2+ leads to an drastic increase of the UC luminescence centered at 560 nm by a factor of 28. The UC luminescence enhancement is a result of the increased lifetime of the intermediate state 4I11/2 (Er). The intensity ratio of the green over red emissions (green/red) is also affected by the codoping of Zn2+, Li+ and Li+-Zn2+ ions. Our results demonstrated that the Li+-Zn2+ codoping in Y 2O3:Er3+ phosphors produced remarkable enhancement of the UC luminescence and green/red ratio, making this nanocrystal a promising candidate for photonic and biological applications.

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VL - 509

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 2

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Enhancement of upconversion luminescence of Y₂O ₃:Er³⁺ nanocrystals by codoping Li⁺-Zn ²⁺

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