Nonlinear electro-thermal modeling and field-simulation of OLEDs for lighting applications I

Algorithmic fundamentals

László Pohl, Erno Kollár, A. Poppe, Zsolt Kohári

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Large area OLEDs aimed at lighting applications should provide homogeneous luminance - homogeneity is one of the quality metrics of such devices. Local light generation depends on both the local temperature and the local voltage drop across the light emitting polymer(s) in the device. Therefore the thermal and electrical engineering of OLEDs aimed at lighting applications is critical. Due to the large area of these devices the coupled electrical and the thermal simulation problem is of distributed nature. Electrical characteristics of organic semiconductor materials used in OLED devices are highly nonlinear, and their nonlinear temperature-dependence is significant. In our present approach to distributed electro-thermal field simulation we address special needs of OLEDs, which is not yet the case with widely used, commercially available simulation tools. In this paper we present the latest version of our SUNRED electro-thermal field solver algorithm capable of handling coupled, non-linear electro-thermal problems. The new features of the algorithm are demonstrated by modeling some research OLED samples available to us in the Fast2Light project - this way simulation results are compared against measured data.

Original languageEnglish
Pages (from-to)624-632
Number of pages9
JournalMicroelectronics Journal
Volume43
Issue number9
DOIs
Publication statusPublished - Sep 2012

Fingerprint

Organic light emitting diodes (OLED)
illuminating
Lighting
simulation
electrical engineering
thermal simulation
organic semiconductors
Heat problems
luminance
Semiconducting organic compounds
homogeneity
Electrical engineering
engineering
Luminance
Polymers
temperature dependence
Hot Temperature
Semiconductor materials
polymers
electric potential

Keywords

  • Electro-thermal
  • Field simulation
  • Modeling
  • Nonlinear
  • OLED

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Nonlinear electro-thermal modeling and field-simulation of OLEDs for lighting applications I : Algorithmic fundamentals. / Pohl, László; Kollár, Erno; Poppe, A.; Kohári, Zsolt.

In: Microelectronics Journal, Vol. 43, No. 9, 09.2012, p. 624-632.

Research output: Contribution to journalArticle

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