Laser induced thermal effect on upconversion luminescence and temperature-dependent upconversion mechanism in Ho3+/Yb3+-codoped Gd2(WO4)3 phosphor

•Gd2(WO4)3:Ho/Yb phosphor was synthesized via co-precipitation route.•Laser-induced thermal effect on the upconversion was studied in Gd2(WO4)3.•Time scanning upconversion spectra were detected.•Temperature-dependent upconversion mechanisms were analyzed. Sub-micro sized Gd2(WO4)3:Yb3+/Ho3+ phosphor...

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Bibliographic Details
Published in:Optical materials 2013-05, Vol.35 (7), p.1487-1492
Main Authors: Liu, Wei, Sun, Jiashi, Li, Xiangping, Zhang, Jinsu, Tian, Yue, Fu, Shaobo, Zhong, Hua, Liu, Tianhong, Cheng, Lihong, Zhong, Haiyang, Xia, Haiping, Dong, Bin, Hua, Ruinian, Zhang, Xiangqing, Chen, Baojiu
Format: Article
Language:English
Subjects:
Crystal structure
Emission
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Gd2(WO4)3:Ho3+/Yb3
Irradiation
Lasers
Luminescence
Nonlinear optical crystals
Nonlinear optics
Optical materials
Optics
Phosphors
Physics
Scanning
Thermal effect
Thermal quenching
Time-scanning
Upconversion
Upconversion luminescence
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Summary:•Gd2(WO4)3:Ho/Yb phosphor was synthesized via co-precipitation route.•Laser-induced thermal effect on the upconversion was studied in Gd2(WO4)3.•Time scanning upconversion spectra were detected.•Temperature-dependent upconversion mechanisms were analyzed. Sub-micro sized Gd2(WO4)3:Yb3+/Ho3+ phosphor was synthesized via a co-precipitation reaction. The crystal structure and morphology of the phosphor were characterized by XRD and SEM. The time scanning of green and red upconversion emissions displayed that the upconversion luminescent intensities were dependent on the irradiation time and the excitation powder, which was resulted from the thermal effect induced by LD (laser diode) irradiation. The upconversion luminescence of Gd2(WO4)3:Yb3+/Ho3+ phosphor at different sample temperatures was studied. It was found that at room temperature the red and green upconversion emissions were 1.5- and 2-photon processes, respectively. With increasing sample temperature the 2-photon process for the red upconversion emission and 3-photon process for green upconversion emission occurred.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2013.03.008