Details

Autor(en) / Beteiligte

• Zhou, Xiong
• Fang, Lizhi
• Huang, Shuangwu
• Xia, Haiping
• Hu, Jianxu
• Zhang, Jianli
• Chen, Baojiu

Titel

Ultraviolet and Near-infrared Luminescence of Ce3+/Yb3+ Co-doping LiLuF4 Single Crystal

Ist Teil von

• Wu ji cai liao xue bao, 2020-05, Vol.35 (5), p.556

Ort / Verlag

Beijing: Chinese Academy of Sciences

Erscheinungsjahr

2020

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• LiLuF4 single crystals doped with Ce3+ ion of 0.1 mol% and Yb3+ ion of concentration varying from 0 to 2.0 mol% were successfully synthesized by an improved Bridgman method. Intense near-infrared emission at around 1020 nm, attributed to the 2 F5/2→2 F7/2 transition of Yb3+, and ultraviolet emission of Ce3+ at 300–350 nm（5 d→4 f） was observed using excitation at 291 nm. Influence of Yb3+ ions concentration on the spectroscopic properties of Ce3+/Yb3+ co-doped LiLuF4 single crystal and the mechanism of energy transfer from Ce3+ to Yb3+ ions were explored through optical absorption and emission spectra. The temperature dependent emission indicated that the emission intensity constantly decreases with the increase of temperature from 298 to 443 K due to the enhancement of non-radiative quenching at high temperature. Ce3+/Yb3+ co-doped LiLuF4 single crystals mainly emit in the ultraviolet and near-infrared ranges. This unique property may be suitable for applications in anti-counterfeiting techniques and public s