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red long lasting phosphorescence of Eu^(3+) doped BiOCl semiconducting polycrystals

Journal of Rare Earths 2016年第12期34卷 1188-1192页

作者：周玉婷宋志国李永进刘群徐祖元胡锐张相周邱建备杨正文 School of Materials Science and Engineering Kunming University of Science and Technology Department of Science Research Yunnan Technology and Business University

The exploration of novel long lasting red phosphors is still of importance due to expected commercial applications and scientific interests. In this work, we reported the red long lasting phosphorescence（LLP） from Eu^3＋ doped BiOCl semiconductor polycrystals. The LLP property of the red phosphor is relatively weak due to less trap density, but the excitation band of LLP stems from the energy gap transition of semiconductor, offering experimental evidence for energy transfer between BiOCl semiconductor and Eu^3＋ ions. Although the afterglow duration of Eu^3＋ doped BiOCl was short temporarily, this work may open a novel kind of red LLP phosphors.

关键词： BiOCl red long lasting phosphorescence thermoluminescence rare earths

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red long lasting phosphorescence of Mn^(2+) Doped Zinc Phosphate Glasses

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Journal of Wuhan University of Technology(Materials Science) 2007年第B12期22卷 799-802页

作者：廉志红苏锵 College of Materials Science and Engineering Hebei Polytechnic University Key Laboratory of Rare Earth Chemistry and Physics Changehun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and Physics Changehun Institute of Applied ChemistryChinese Academy of Sciences State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical EngineeringSun Yat-Sen UniversityGuangzhou 510275China

Mn^2＋ doped ZnO-P2O5 glasses emit red fluorescence, which shows that Mn^2＋ ion doped in zinc phosphate glass is octahedrally coordinated. Moreover, glass samples exhibit bright red long lasting phosphorescence （LLP） when the mole percent of ZnO are more than 60%. After turnoff the irradiation source of UV lamp peaking at 254 nm, the red phosphorescence can be observed for about 6 h in the limit of light perception for naked eyes （0.32 mcd/m^2）. Photoluminescence （PL） spectra, LLP emission spectra and decay curves were detected. Increasing MnO or ZnO content, the phosphorescence intensity can be improved distinctly and the emission wavelength can be also adjusted from 595 nm to 628 nm. According to the structural characteristic of zinc phosphates glasses, we suggest that non-bridge oxygen （NBO） is probably related with the arising of LLE Meantime, the variation of crystal field intensity induced that the LLP emission wavelength red shifts.

关键词： red long lasting phosphorescence zinc phosphate glass Mn^2+

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