Luminescence properties of Er3+-doped NaLaMgWO6 green-emitting phosphor and its luminescence optimization utilizing alkali metal ion substitution strategy

作者：Han, Bing^*; Dai, Yazhou; Liu, Beibei; Zhang, Jie; Shi, Hengzhen^*

来源：Journal of Materials Science: Materials in Electronics , 2018, 29(23): 19846-19853.

DOI：10.1007/s10854-018-0113-y

• ENERGY-TRANSFER
• ULTRAVIOLET-LIGHT
• NEAR-ULTRAVIOLET
• BLUE
• EMISSIONS
• PHOTOLUMINESCENCE
• RE

A series of trivalent erbium ion (Er3+) doped NaLaMgWO6 green-emitting phosphors with different doping concentration were prepared by a traditional solid-state reaction at high temperature, and their structural and luminescence properties were investigated in detail. Upon excitation with near ultraviolet (379nm), the as-prepared phosphors exhibited the dominated green emissions, in which the (S3/2I15/2)-S-4-I-4 transition (544nm) was with the highest intensity. The optimal concentration of Er3+ was confirmed to be 0.03, beyond which the concentration quenching phenomenon of Er3+ occurred due to the electric dipole-dipole interaction between the neighboring Er3+ ions. The decay lifetime for (S3/2I15/2)-S-4-I-4 transition of Er3+ was of microsecond level and decreased monotonously with the increasing Er3+ ion concentration. The alkali metal ion substitution strategy was also utilized to improve the green emissions of NaLaMgWO6:Er3+ phosphor by replacing Na+ with K+/Li+. This present work is helpful for the development of novel green-emitting phosphors for the potential application in white light-emitting diodes.

• 出版日期2018-12
• 单位郑州轻工业大学