Investigation on upconversion photoluminescence of Bi sub(3TiNbO) sub(9):Er super(3+:Yb) super(3)+ thin films

Bi sub(3TiNbO) sub(9):Er super(3+:Yb) super(3)+ (BTNEY) thin films were fabricated on fused silica by pulsed laser deposition. It was demonstrated that different laser fluence and substrate temperature during growth of BTNEY upconversion photoluminescence (UC-PL) samples control the film's grai...

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Bibliographic Details
Published in:Journal of luminescence 2011-12, Vol.131 (12), p.2574-2578
Main Authors: Chen, Hengzhi, Yang, Bin, Sun, Yan, Zhang, Mingfu, Sui, Yu, Zhang, Zhiguo, Cao, Wenwu
Format: Article
Language:English
Subjects:
Deposition
Emission
Fluence
Grain size
Lasers
Photoluminescence
Thin films
Upconversion
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Summary:Bi sub(3TiNbO) sub(9):Er super(3+:Yb) super(3)+ (BTNEY) thin films were fabricated on fused silica by pulsed laser deposition. It was demonstrated that different laser fluence and substrate temperature during growth of BTNEY upconversion photoluminescence (UC-PL) samples control the film's grain size and hence influences the UC-PL properties. The average grain size of BTNEY thin films deposited on fused silica substrates with laser fluence 4, 5, 6, and 7 J/cm super(2 are 30.8, 35.9, 40.6, and 43.4 nm, respectively. The 525 nm emission intensities increase with the deposition laser fluence and the emission intensities of BTNEY thin film deposited under 700 and 600 degree C are almost 24 and 4 times, respectively, as strong as those of samples under 500 degree C. The grain size of BTNEY thin film increases with the increasing temperature. UC-PL of BTNEY films is enhanced by increasing grain size of the films.)
ISSN:0022-2313
DOI:10.1016/j.jlumin.2011.06.045