Nonlinear electro-thermal modeling and field-simulation of OLEDs for lighting applications II: Luminosity and failure analysis

Multi-Domain Characterization of Cob Leds

“…In the past European project called Fast2Light we worked out a method for multi-domain simulation of large area OLEDs (Pohl, 2012, Kohári, 2013. In case of OLEDs both heat conduction, electrical conduction (through the transparent ITO layer) and light generation (in the LEP layer) were of distributed nature.…”

Solid-State Lighting: A Concise Review of the State of the Art on LED and OLED Modeling

“…The same authors proposed a methodology for thermal and electrical characterization of large area OLEDs in [89], and finally, a nonlinear electrothermal model, as shown in Figure 8, was presented in [90]. This electrothermal model takes into account the luminosity dependency of current density [I (V,T)] and temperature (T) distribution in the light-emitting layer.…”

“…The interaction among these domains is indicated by arrows in the model of Figure 8. By extending the electrothermal model with a luminance computing algorithm, the homogeneity of large-area devices can be determined [90].…”

Integration of Optical and Thermal Models for Organic Light-Emitting Diodes

“…Meanwhile organic light-emitting diodes (OLED) have shown high potential to replace surface lighting sources, such as indoor and decorative luminaires [1]. Although OLEDs are thin, flat, flexible, and provide a comfortable light source with a large-emitting area, challenges involving increasing panel sizes, improving luminous efficiency, and reducing manufacturing costs remain before OLEDs may be introduced to the lighting market [2]. Advanced OLED display technology has the advantages of high contrast and low energy consumption, while at the same time demonstrating a fast response time and a large viewing angle [1].…”

“…Since OLED luminaires are generally regarded as large-area lighting devices, the ability of these light sources to exhibit uniform emissions is of great importance. The luminance uniformity of these sources is closely related to spatial temperature distribution [2][3][4][5][6], so greater attention has been focused on the thermal aspects of OLEDs [7]. Therefore, in addition to the conventional optical performance, the thermal characteristics of OLEDs will also be investigated in this study.…”