Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403032 | Journal of Luminescence | 2009 | 4 Pages |
Abstract
Temperature dependence of the electroluminescence (EL)-current efficiency of tris-(8-hydroxyquinolinato) aluminum (III) (Alq3)-based organic light-emitting diodes (OLEDs) operated at a constant current density was investigated. The effects of temperature and electric field on photoluminescence (PL) efficiency of Alq3 thin layers were also investigated. On the basis of these results, it was found that the EL efficiency decreases more markedly with increasing temperature than does PL efficiency. The temperature dependence of the EL efficiency can be interpreted in terms of the thermal dissociation of excitons that is assisted by the electric field.
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Authors
Takeshi Hirai, Miho Asahi, Yohei Iwasaki, Akira Kimura, Michio Matsumura,