Kim, K. P. Lee, K. S. Kim, T. W. Woo, D. H. Kim, J. H. Seo, J. H. Kim, Y. K. 2024-01-20T23:31:46Z 2024-01-20T23:31:46Z 2021-09-03 2008-04-01 0040-6090 https://pubs.kist.re.kr/handle/201004/133563 The light extraction efficiencies of organic light emitting diodes (OLEDs) utilizing various kinds of porous alumina films with different pore diameters were investigated. The OLEDs with the porous alumina film deposited on the glass surface were fabricated to improve their light extraction efficiency. The porous alumina film was fabricated by using a two step anodizing electrochemical procedure. The current densities as functions of the applied voltage do not significantly change, regardless of the existence and the magnitude of the pore diameter in the porous alumina film. The luminance efficiency of the OLEDs increased with increasing pore diameter. The luminance efficiency of the OLEDs utilizing the porous alumina film with a pore diameter of 70 nm was enhanced approximately 9% in comparison with that of the OLEDs without the porous alumina film. These results indicate that highly efficient OLEDs can be fabricated using a porous alumina film with an optimum pore diameter. (c) 2007 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA EMISSION DEVICES Enhancement of the light extraction efficiency in organic light emitting diodes utilizing a porous alumina film Article 10.1016/j.tsf.2007.08.031 1 THIN SOLID FILMS, v.516, no.11, pp.3633 - 3636 THIN SOLID FILMS 516 11 3633 3636 scie scopus 000255421900041 2-s2.0-40649092571 Materials Science, Multidisciplinary Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Materials Science Physics Article; Proceedings Paper EMISSION DEVICES OLED porous alumina film light extraction efficiency luminance efficiency