Enhancement of the upconversion luminescence intensity in Er3+ doped BaTiO3 nanocrystals by codoping with Li+ ions

Qiu Sun; Xiangqun Chen; Zhikai Liu; Fuping Wang; Zhaohua Jiang; Chao Wang

doi:10.1016/j.jallcom.2010.12.212

Enhancement of the upconversion luminescence intensity in Er³⁺ doped BaTiO₃ nanocrystals by codoping with Li⁺ ions

Qiu Sun
, Xiangqun Chen^*
, Zhikai Liu
, Fuping Wang
, Zhaohua Jiang
, Chao Wang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Harbin Institute of Technology
Heilongjiang Academy of Sciences

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

107 Scopus citations

Abstract

Infrared-to-visible upconversion luminescence spectra were investigated in Er³⁺ doped and Er³⁺-Li⁺ codoped BaTiO ₃ nanocrystals following excitation with 976 nm. By introducing Li⁺ ions, the upconverted emission intensity is found to be greatly enhanced compared to that of the nanocrystals without Li⁺ ions. The enhanced luminescence might be attributed to the oxygen vacancy generated by Li⁺ ion incorporation in the lattices and the distortion of the local asymmetry around Er³⁺. We observe that excitation power dependence and decay time are increased by the incorporation of Li⁺ ions. Li⁺ ions also can reduce the OH groups in specimen, which decrease nonradiative decay from the ⁴S_3/2 to ⁴F _9/2, enhancing the upconversion emission intensities.

Original language	English
Pages (from-to)	5336-5340
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	17
DOIs	https://doi.org/10.1016/j.jallcom.2010.12.212
State	Published - 28 Apr 2011
Externally published	Yes

Keywords

Decay time
Local asymmetry
Luminescence
Oxygen vacancy

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10.1016/j.jallcom.2010.12.212

Cite this

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title = "Enhancement of the upconversion luminescence intensity in Er3+ doped BaTiO3 nanocrystals by codoping with Li+ ions",

abstract = "Infrared-to-visible upconversion luminescence spectra were investigated in Er3+ doped and Er3+-Li+ codoped BaTiO 3 nanocrystals following excitation with 976 nm. By introducing Li+ ions, the upconverted emission intensity is found to be greatly enhanced compared to that of the nanocrystals without Li+ ions. The enhanced luminescence might be attributed to the oxygen vacancy generated by Li+ ion incorporation in the lattices and the distortion of the local asymmetry around Er3+. We observe that excitation power dependence and decay time are increased by the incorporation of Li+ ions. Li+ ions also can reduce the OH groups in specimen, which decrease nonradiative decay from the 4S3/2 to 4F 9/2, enhancing the upconversion emission intensities.",

keywords = "Decay time, Local asymmetry, Luminescence, Oxygen vacancy",

author = "Qiu Sun and Xiangqun Chen and Zhikai Liu and Fuping Wang and Zhaohua Jiang and Chao Wang",

year = "2011",

month = apr,

day = "28",

doi = "10.1016/j.jallcom.2010.12.212",

language = "英语",

volume = "509",

pages = "5336--5340",

journal = "Journal of Alloys and Compounds",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Enhancement of the upconversion luminescence intensity in Er3+ doped BaTiO3 nanocrystals by codoping with Li+ ions

AU - Sun, Qiu

AU - Chen, Xiangqun

AU - Liu, Zhikai

AU - Wang, Fuping

AU - Jiang, Zhaohua

AU - Wang, Chao

PY - 2011/4/28

Y1 - 2011/4/28

N2 - Infrared-to-visible upconversion luminescence spectra were investigated in Er3+ doped and Er3+-Li+ codoped BaTiO 3 nanocrystals following excitation with 976 nm. By introducing Li+ ions, the upconverted emission intensity is found to be greatly enhanced compared to that of the nanocrystals without Li+ ions. The enhanced luminescence might be attributed to the oxygen vacancy generated by Li+ ion incorporation in the lattices and the distortion of the local asymmetry around Er3+. We observe that excitation power dependence and decay time are increased by the incorporation of Li+ ions. Li+ ions also can reduce the OH groups in specimen, which decrease nonradiative decay from the 4S3/2 to 4F 9/2, enhancing the upconversion emission intensities.

AB - Infrared-to-visible upconversion luminescence spectra were investigated in Er3+ doped and Er3+-Li+ codoped BaTiO 3 nanocrystals following excitation with 976 nm. By introducing Li+ ions, the upconverted emission intensity is found to be greatly enhanced compared to that of the nanocrystals without Li+ ions. The enhanced luminescence might be attributed to the oxygen vacancy generated by Li+ ion incorporation in the lattices and the distortion of the local asymmetry around Er3+. We observe that excitation power dependence and decay time are increased by the incorporation of Li+ ions. Li+ ions also can reduce the OH groups in specimen, which decrease nonradiative decay from the 4S3/2 to 4F 9/2, enhancing the upconversion emission intensities.

KW - Decay time

KW - Local asymmetry

KW - Luminescence

KW - Oxygen vacancy

UR - https://www.scopus.com/pages/publications/79953167835

U2 - 10.1016/j.jallcom.2010.12.212

DO - 10.1016/j.jallcom.2010.12.212

M3 - 文章

AN - SCOPUS:79953167835

SN - 0925-8388

VL - 509

SP - 5336

EP - 5340

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 17

ER -

Enhancement of the upconversion luminescence intensity in Er³⁺ doped BaTiO₃ nanocrystals by codoping with Li⁺ ions

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Keywords

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