Soft x-ray-excited luminescence and optical x-ray absorption fine structures of tris (8-hydroxyquinoline) aluminum
- and others
Photoluminescence from tris (8-hydroxyquinoline) aluminum (Alq{sub 3}) films has been observed using tunable soft x rays as an excitation source. The photons were tuned to energies above and below the K absorption edges of C, N, O, and Al. The luminescence was in turn used to monitor the absorption. It was found that the luminescence induced by soft x ray exhibits additional emission bands at shorter wavelengths compared to ultraviolet excitation. While all K edges exhibit optical x-ray absorption fine structures (XAFS) similar to those of total electron and fluorescence yield, the optical XAFS at the C K-edge resonance are enhanced for the C1s to {pi}{sup *} transitions, indicating site specificity. These observations are attributed to the energetics of the process and the local electronic structure.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205256
- Journal Information:
- Applied Physics Letters, Vol. 78, Issue 13; Other Information: DOI: 10.1063/1.1358360; Othernumber: APPLAB000078000013001847000001; 021113APL; PBD: 26 Mar 2001; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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