Abstract
This paper proposes a three-dimensional model for combinative analysis of the illuminative and thermal properties of organic light-emitting diodes (OLED). By means of the energy conversion ratio and energy conservation theory, two individual optical and thermal sub-models are integrated to form a single model constructed in a multi-physics platform. According to the measured luminous performance and temperature distribution of the fabricated OLED samples, the proposed model demonstrates sufficient accuracy. Moreover, the temperature distribution on the cross-section of the OLED can be derived from the proposed model and used as a valuable reference for manufacturers to select appropriate organic materials.
Highlights
With the development of solid-state lighting technology, light-emitting diodes (LED) have been applied to many different types of lighting products and have gradually dominated the common lighting market
Since organic light-emitting diodes (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]
Summary
With the development of solid-state lighting technology, light-emitting diodes (LED) have been applied to many different types of lighting products and have gradually dominated the common lighting market. Several studies have constructed models for investigating the optical and thermal properties of OLEDs, with some accounting for their electrical properties. Such models employ fluid dynamics, successive network reductions, equivalent circuits, spectral power distributions, and so on [2,3,4,5,8,9,10,11,12,13]. Using the parameters of the energy-conversion ratios, the two sub-models are integrated into a single model To construct such a 3D model, both sub-models are established geometrically in a multiphysics-embedded platform, COMSOL, and a bottom-emission OLED device is used as an example. The details of each sub-model are described
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