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

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

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.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume157
Issue number6
DOIs
StatePublished - 1 Nov 2010

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