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Electrical Behavior I-V Theoretical-Experimental OLEDS

Published online by Cambridge University Press:  10 February 2014

José M. Burgoa,
Cecilia González-Medina,
Ramón Gómez-Aguilar and
Jaime Ortiz-López
José M. Burgoa
Affiliation:
Unidad Profesional Interdisciplinaria de Ingeniería y Tecnología Avanzadas-IPN, Av. Instituto Politécnico Nacional 2580, México City, 07540.
Cecilia González-Medina
Affiliation:
Unidad Profesional Interdisciplinaria de Ingeniería y Tecnología Avanzadas-IPN, Av. Instituto Politécnico Nacional 2580, México City, 07540.
Ramón Gómez-Aguilar
Affiliation:
Unidad Profesional Interdisciplinaria de Ingeniería y Tecnología Avanzadas-IPN, Av. Instituto Politécnico Nacional 2580, México City, 07540.
Jaime Ortiz-López
Affiliation:
Escuela Superior de Física y Matemáticas-IPN, Av. Instituto Politécnico Nacional Edificio 9, Unidad Profesional Adolfo López Mateos, Zacatenco, Mexico City, 07738.
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Abstract

We develop a program (within MATLAB software environment) to numerically simulate current-voltage characteristics of a bilayer organic light-emitting diode (OLED). The program is based on the Poole-Frenkel and Schottky continuous quantum models which take into account the geometry of thin films and their emission parameters in the calculation of charge carrier and current density in organic materials. Simulations are performed for OLEDs with A/EML/C and A/HIL/EML/C architectures where A=anode, HIL=hole injection layer, EML=emissive layer and C=cathode. For EML we assume MEH-PPV and MDMO-PPV derivatives of poly-para-phenylene-vinylene (PPV) polymer semiconductor, and for HIL we use PEDOT:PSS. The results of simulation are compared with experimental results obtained from actual OLED devices constructed in our laboratory. For comparison we also use the commercial software SimOLED to simulate the devices under similar architectures. We find in general a fair agreement between the simulated and measured behavior except for a few orders of magnitude difference in the current.

Keywords

simulationorganicpolymer

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References

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