Electric field and temperature dependence of photoluminescence in fluorescent dye doped tris(8-hydroxyquinoline) aluminum

Yichun Luo; Hany Aziz; Gu Xu; Zoran D. Popovic

doi:10.1117/12.692910

5 December 2006 Electric field and temperature dependence of photoluminescence in fluorescent dye doped tris(8-hydroxyquinoline) aluminum

Yichun Luo, Hany Aziz, Gu Xu, Zoran D. Popovic

Author Affiliations +

Proceedings Volume 6333, Organic Light Emitting Materials and Devices X; 63331V (2006) https://doi.org/10.1117/12.692910
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

We measured electric-field-induced fluorescence quenching (EFIFQ) under various temperatures in both undoped and fluorescent dye-doped tris(8-hydroxyquinoline )aluminum (AlQ₃) layers of organic light-emitting devices (OLEDs). Results show that for a given temperature doped AlQ₃ layers demonstrate smaller EFIFQ than undoped ones. The phenomenon is attributed to the narrower energy band-gap of the guest molecule relative to that of the host material, which makes it less prone to electric-field-induced dissociation of the excited state. Results also show that for a given doping condition increasing the temperature leads to an increase in EFIFQ, indicating that the EFIFQ is a thermally assisted process.

Citation Download Citation

Yichun Luo, Hany Aziz, Gu Xu, and Zoran D. Popovic "Electric field and temperature dependence of photoluminescence in fluorescent dye doped tris(8-hydroxyquinoline) aluminum", Proc. SPIE 6333, Organic Light Emitting Materials and Devices X, 63331V (5 December 2006); https://doi.org/10.1117/12.692910

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