Abstract
Rare earth chelates of Sm(III) (complex 1) and Eu(III) (complex 2) with β-diketone ligand (2-thienyl)trifluoroacetylacetone (HTTA) and triphenylphosphine oxide (TPPO) were prepared from their nitrate salts. Single crystal X-ray diffraction, FTIR and thermo-gravimetric analyses were used in the characterization. Both photoluminescence (PL) and electroluminescence (EL) properties of complex 2 were studied. In both crystalline powder and film states, the PL spectra exhibit emission peaks typical of europium (III) with the most intense at 615 nm. Single layer EL devices based on complex 2 fabricated by evaporation show only weak emissions, while double layer devices with a hole transporting layer of N,N-bis(3-methylphenyl)-N,N′-diphenyl-benzidine (TPD) exhibit enhanced intensity indicating better carrier injection balance.
| Original language | English |
|---|---|
| Pages (from-to) | 78-84 |
| Number of pages | 7 |
| Journal | Thin Solid Films |
| Volume | 417 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Sept 30 2002 |
| Externally published | Yes |
| Event | Proceedings of the International Conference on Materials for - Singapore, Singapore Duration: Jul 1 2001 → Jul 6 2001 |
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry
Keywords
- Electroluminescence
- Europium (III)
- Rare earth chelates
- Samarium (III)