A green-emitting phosphor Sr3 La(PO4)3: Ce3+, Tb3+ with efficient energy transfer for fluorescent lamp

Te Wen Kuo*, Teng-Ming Chen

*Corresponding author for this work

研究成果: Article同行評審

84 引文 斯高帕斯(Scopus)

摘要

Green-emitting phosphors of Sr3 La (PO4)3: Ce3+, Tb3+ have been synthesized by a solid-state reaction. The energy transfer from Ce3+ to Tb3+ is a resonant type via a dipole-dipole mechanism with an energy-transfer critical distance of 7.6 Å. By utilizing the principle of energy transfer and appropriate tuning of activator contents, we have also made an attempt to observe a strong green emission performance displayed by this phosphor for use as a coating material on compact fluorescent lamps (CFLs). The results clearly indicate that the luminous efficiency based on Sr3 (La0.67 Ce0.08 Tb0.25) (PO4)3 was found to be 69 lm/W. The good luminous efficiency and lumen maintenance (2000 h, 91.8%) of the green-emitting CFL demonstrate that this phosphor can be suitable for application on a short UV fluorescent lamp. Additionally, the Sr3 (La0.67 Ce0.08 Tb0.25) (PO4)3 green phosphor has advantages of environmental friendliness and low cost.

原文English
期刊Journal of the Electrochemical Society
157
發行號6
DOIs
出版狀態Published - 1 十一月 2010

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