Intensity and temperature-dependent photoluminescence of tris (8-hydroxyquinoline) aluminum films

Journal Article · Wed Dec 04 00:00:00 EST 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4848344· OSTI ID:22261775

Ajward, A. M.; Wang, X.; Wagner, H. P. ^[1]

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1. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 (United States)

We investigate the recombination of excitons in tris (8-hydroxyquinoline) aluminum films by intensity and temperature dependent time-resolved photoluminescence (PL). At low temperature (15 K) and elevated excitation intensity the radiative emission is quenched by singlet-singlet annihilation processes. With rising temperature the PL quenching is strongly reduced resulting in a PL efficiency maximum at ∼170 K. The reduced exciton annihilation is attributed to thermally activated occupation of non-quenchable trapped exciton states. Above 170 K the PL efficiency decreases due to thermal de-trapping of radiative states and subsequent migration to non-radiative centers.

• OSTI ID: 22261775
• Journal Information: AIP Conference Proceedings, Vol. 1566, Issue 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
ANNIHILATION
EFFICIENCY
FILMS
OXINE
PHOTOLUMINESCENCE
QUENCHING
RECOMBINATION
TEMPERATURE DEPENDENCE
TIME RESOLUTION