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Electro-thermal effects in large area white-organic light emitting diodes
Author(s): M. Kumar; J. Gomes; A. Pinto; L. Pereira
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Paper Abstract

OLEDs for lighting became of high relevance, although challenges in the uniformity and thermal effects. In this work, White-OLEDs with 16 cm2 emitting area was made with wide color temperature range (3200 K to 10500K) and color rendering index near 90. The CIE coordinates are stable with applied voltage. Thermal images shows 60°C in the center decreasing to 35°C at the border. This effect was study by a scalar electro-thermal model, considering the substrate, electrodes and organic layers. The thermal changing ratio in the series resistance and forward voltage obtained was of - 70 mΩ/°C and -10 mV/°C respectively.

Paper Details

Date Published: 22 August 2017
PDF: 7 pages
Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 1045335 (22 August 2017); doi: 10.1117/12.2276382
Show Author Affiliations
M. Kumar, Ctr. for Nanotechnologies and Smart Materials (Portugal)
Univ. of Aveiro (Portugal)
J. Gomes, Ctr. for Nanotechnologies and Smart Materials (Portugal)
A. Pinto, Ctr. for Nanotechnologies and Smart Materials (Portugal)
L. Pereira, Univ. of Aveiro (Portugal)


Published in SPIE Proceedings Vol. 10453:
Third International Conference on Applications of Optics and Photonics
Manuel Filipe P. C. M. Martins Costa, Editor(s)

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