A physically based mathematical model for the dc current of single-carrier organic light emitting\ud
diodes is presented. The model accounts for the most important physical quantities that influence the\ud
carrier mobility and thus the device current itself: temperature, charge carrier concentration, and\ud
electric field. It is rigorously developed basing on the variable range hopping transport theory and\ud
extends the pioneering work of Mark and Helfrich J. Appl. Phys. 33, 205 1962 to large electric\ud
fields typical of light emitting diodes. It was validated on experimental data collected from devices\ud
of different materials in a wide range of operating conditions. Thanks to the effective electric field\ud
approach, the mathematical expression is simple, accurate and suitable for CAD applications
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.