Organic Light Emitting Diodes (OLEDs) have been widely adopted for use in mobile phone displays, and are promising candidates for solid state lighting applications. Solid state lighting would require brighter OLEDs than those currently available, which is a challenge as OLEDs experience a dramatic decrease (often called "roll-off") in external quantum efficiency at higher brightness. The mechanism of this roll-off is the subject of much debate, as it is difficult to probe experimentally. Computational predictions rely on kinetic Monte Carlo techniques, which are too expensive to use for device screening. We investigate OLED roll-off using a new model, called the mean field steady state model, which has previously been shown to give results comparable to kinetic Monte Carlo for simple systems at a fraction of the cost. We find that this model is able to reproduce experimental results well, and it suggests that the mechanism may be device dependent.

Efficient kinetic model for studying OLED roll-off

256th National Meeting (2018)

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