A luminescent dinuclear Eu(III) complex based on 2,8-bis(4‧,4‧,4‧,-trifluoro-1‧,3‧-dioxobutyl)-dibenzothiophene for light-emitting diodes
Abstract
A dinuclear Eu (III) complex Eu 2(dbt) 3·4H 2O was synthesized, where H 2dbt was 2,8-bis(4‧,4‧,4‧,-trifluoro-1‧,3‧-dioxobutyl)-dibenzothiophene. The complex emits the characteristic red luminescence of Eu 3+ ion due to the 5D 0→ 7F J ( J=0-4) transitions under 395 nm-light excitation with a luminescent quantum efficiency of 17%. The complex is thermally stable up to 280 °C. It was found that the complex can be effectively excited by a 395 nm-emitting InGaN chip. Bright red light was obtained using the complex as light color-conversion material.
- Publication:
-
Journal of Luminescence
- Pub Date:
- January 2010
- DOI:
- 10.1016/j.jlumin.2009.12.013
- Bibcode:
- 2010JLum..130..855L
- Keywords:
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- Lanthanide complex;
- Phosphor;
- Luminescence;
- LED