Abstract: Charge transport, with charge carrier mobility as main parameter, is one of the fundamental properties of semiconductors. In disordered systems like most organic semiconductors, the effective mobility is a function of the electric field, the charge carrier density, and temperature. Transport is often investigated in a space-charge limited current (SCLC) regime in thin film single carrier devices, where an electric current is driven in the direction perpendicular to the surface. Direct evaluation of the current–voltage characteristics, however, is problematic, because parasitic contributions from injection or extraction barriers can falsify results.[1] Understanding and modeling charge transport in conjugated polymers is crucial to optimize the performance of organic semiconductor devices such as light-emitting diodes (OLEDs), field-effect transistors (OFETs) and solar cells[2]. The charge-carrier mobility is the major determining factor for the speed of electronic devices. Arguably, the most significant of them is the challenge to achieve a comprehensive understanding of the fundamentals of charge injection and charge transport in organics [3]. In the present work, analytical models are developed for bilayer devices in particular, which reveals the dependence of current, efficiency etc. on various device parameters.
Keywords: Charge transport, semiconductors, current–voltage characteristics, temperature.
Title: Analytical Modeling of Charge transport in Bilayer Organic Light Emitting Diode
Author: Rajesh Kumar Awasthy, J.K. Sharma, R. Swami, Swati Sahu, Sanjay Tiwari
International Journal of Mathematics and Physical Sciences Research
ISSN 2348-5736 (Online)
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