A1 Refereed original research article in a scientific journal
Electro-thermal effects in large area White-Organic Light Emitting Diodes
Authors: Kumar M, Gomes J, Pinto A, Pereira L
Publisher: SPIE-INT SOC OPTICAL ENGINEERING, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
Publication year: 2017
Journal: Proceedings of SPIE : the International Society for Optical Engineering
Journal name in source: THIRD INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS
Journal acronym: PROC SPIE
Article number: UNSP 1045335
Volume: 10453
Number of pages: 7
ISSN: 0277-786X
DOI: https://doi.org/10.1117/12.2276382(external)
Abstract
OLEDs for lighting became of high relevance, although challenges in the uniformity and thermal effects. In this work, White-OLEDs with 16 cm(2) 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 degrees C in the center decreasing to 35 degrees 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 m Omega/ degrees C and -10 mV/ degrees C respectively.
OLEDs for lighting became of high relevance, although challenges in the uniformity and thermal effects. In this work, White-OLEDs with 16 cm(2) 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 degrees C in the center decreasing to 35 degrees 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 m Omega/ degrees C and -10 mV/ degrees C respectively.
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