A luminescent Eu(III) complex based on 2-(4′, 4′, 4′-trifluoro-1′, 3′-dioxobutyl)-dibenzothiophene for light-emitting diodes
| Autor: | Xiu-Mei Tan, Sheng Wang, Sheng-Gui Liu, Menglian Gong |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Optics and Photonics
Luminescence Light chemistry.chemical_element Phosphor Thiophenes Photochemistry Atomic and Molecular Physics and Optics Analytical Chemistry law.invention chemistry.chemical_compound Europium chemistry law Dibenzothiophene Ultraviolet light Chromaticity Instrumentation Spectroscopy Light-emitting diode Diode |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 74:731-734 |
| ISSN: | 1386-1425 |
| Popis: | Complex Eu(dbt) 3 (phen) (Hdbt = 2-(4′, 4′, 4′-trifluoro-1′, 3′-dioxobutyl)-dibenzothiophene, phen = 1,10-phenanthroline) was synthesized. The complex emits red luminescence, characteristic of the 5 D 0 → 7 F J ( J = 0–4) emission bands of Eu 3+ under near ultraviolet. A red conversion light-emitting diode (LED) device was fabricated by coating complex onto InGaN-based-LED chip that emits 395 nm ultraviolet light. When the mass ratio of the red phosphor to the silicone is 1:25, the LED device's CIE chromaticity coordinates are x = 0.5835, y = 0.2857, and the luminescence efficiency is 1.29 lm/w. All the results show that this europium complex may act as a red component in fabrication of white LEDs with high color-rendering index. |
| Databáze: | OpenAIRE |
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