Citation
Álvarez, Ángel Luis and Arredondo, Belen and Romero, Beatriz and Quintana Arregui, Patxi Xabier and Gutiérrez Llorente, Araceli and Mallavia, Ricardo and Otón Sánchez, José Manuel
(2008).
Analytical Evaluation of the Ratio Between Injection and Space-Charge Limited Currents in Single Carrier Organic Diodes.
"IEEE Transactions on Electron Devices", v. 55
(n. 2);
pp. 674-680.
ISSN 0018-9383.
https://doi.org/10.1109/TED.2007.912995.
Abstract
An analytical, complete framework to describe the current-voltage (I-V) characteristics of organic diodes without the use of previous approaches, such as injection or bulk-limited conduction is proposed. Analytical expressions to quantify the ratio between injection and space-charge-limited current from experimental I-V characteristics in organic diodes have been derived. These are used to propose a numerical model in which both bulk transport and injection mechanisms are considered simultaneously. This procedure leads to a significant reduction in computing time with respect to previous rigorous numerical models. In order to test the model, different diode structures based on two different polymers: poly(2-methoxy-5-{3',7'-dimethyloctyloxy}-p-phenylenevinylene) (MDMO-PPV) and a derivative of the poly (2,7-fluorene phenylidene) [PFP:(CN)2], have been fabricated. The present model is excellently fitted to experimental curves and yields the microscopic parameters that characterize the active layer.
