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Studies on the growth and optical characterization of Tm 3+ ‐doped BaY 2 F 8 single crystals
Author(s) -
Wang Shuai,
Ruan Yongfeng,
Tsuboi Taiju,
Zhang Shouchao,
Wang Youfa,
Wu Zhouli,
Tong Hongshuang
Publication year - 2012
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201200153
Subject(s) - analytical chemistry (journal) , photoluminescence , excited state , doping , luminescence , absorption spectroscopy , crystal (programming language) , ion , atmospheric temperature range , materials science , absorption (acoustics) , emission spectrum , spectral line , chemistry , optics , atomic physics , optoelectronics , physics , organic chemistry , chromatography , astronomy , meteorology , computer science , composite material , programming language
The BaY 2 F 8 crystals doped with different concentrations of Tm 3+ ions were prepared by the temperature gradient technique (TGT). X‐ray powder diffraction was applied to analyze the phase. The cracking phenomenon along (010) and (100) planes of the crystals grown by temperature gradient technique was studied on the basis of the structure of BaY 2 F 8 crystals. The absorption spectra were measured and investigated in the ultraviolet‐visible and near‐infrared ranges at room temperature. Several characteristic absorption bands of Tm 3+ ‐doped BaY 2 F 8 crystal were observed. The emission and excitation spectra were obtained and investigated at room temperature and 12 K, showing the characteristic emission peaks of Tm 3+ ions. The temperature dependence of Photoluminescence curve was also investigated in the range of 12–296 K. The luminescence intensity of emission bands decreased with increasing temperature, while the effective bandwidth increased. The up‐conversion spectrum excited at 650 nm was recorded and up‐conversion mechanism was analyzed in detail. The result showed the purple, green and yellow emissions corresponding to 3 P 1 → 3 F 3 , 1 D 2 → 3 H 5 and 3 P 0 → 1 G 4 transitions, respectively.