Showing papers by "Jaehoon Park published in 2003"
TL;DR: In this article, the frequency-dependent properties of small molecule-based organic light emitting diodes have been studied and the equivalent circuit models of double-layer devices, for which the single-layer device model is expanded and the interface properties between the organic layers are included, are suggested.
Abstract: Admittance or impedance spectroscopy is one of the powerful tools to study the equivalent circuit models and the dielectric relaxation processes in organic and inorganic materials and devices. The frequency-dependent properties of small molecule-based organic light emitting diodes have been studied. The single-layer diodes can be modeled as a simple parallel resistor–capacitor circuit. The equivalent circuit models of double-layer devices, for which the single-layer device model is expanded and the interface properties between the organic layers are included, are suggested.
14 citations
Journal Article•
1 citations
01 May 2003
TL;DR: Theoretical simulations of spatial distribution of charge carriers and recombination rate, and I-V characteristics of the bilayer organic light emitting diodes are carried out in this article, where drift-diffusion current transport, field-dependent carrier mobility, exponential trap distribution, and Langevin recombination models are included in this computer model.
Abstract: Theoretical simulations of spatial distribution of charge carriers and recombination rate, and I-V characteristics of the bilayer organic light emitting diodes are carried out. Drift-diffusion current transport, field-dependent carrier mobility, exponential trap distribution, and Langevin recombination models are included in this computer model. The simulated results show good agreement with the experimental data indicating the validity of the physical models for organic light emitting diodes.