Temperature- and field-dependent quantum efficiency in tris-(8-hydroxy) quinoline aluminum organic light-emitting diode

Shymal Kumar Saha; Yan-Kuin Su; Fuh Shyang Juang

doi:10.1117/12.392151

11 July 2000 Temperature- and field-dependent quantum efficiency in tris-(8-hydroxy) quinoline aluminum organic light-emitting diode

Shymal Kumar Saha, Yan-Kuin Su, Fuh Shyang Juang

Author Affiliations +

Proceedings Volume 4078, Optoelectronic Materials and Devices II; (2000) https://doi.org/10.1117/12.392151
Event: Photonics Taiwan, 2000, Taipei, Taiwan

Abstract

Temperature- and field-dependent electroluminescence and quantum efficiency have been investigated in tris-(8hydroxy) quinoline aluminum (Alq₃)light emitting diode over the temperature range from 10K to 300K. It has been observed that up to a certain temperature luminescence intensity decreases with decreasing temperature and then saturated in the low temperature region. The quantum efficiency increases with decreasing temperature and finally reaches to almost a constant value. At lower applied voltage, two peaks have been observed in the quantum efficiency with temperature. The two peaks are attributed due to deep trap levels (high temperature regime) and shallow trap levels (low temperature regime) in Alq₃.

Citation Download Citation

Shymal Kumar Saha, Yan-Kuin Su, and Fuh Shyang Juang "Temperature- and field-dependent quantum efficiency in tris-(8-hydroxy) quinoline aluminum organic light-emitting diode", Proc. SPIE 4078, Optoelectronic Materials and Devices II, (11 July 2000); https://doi.org/10.1117/12.392151

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