Synthesis and electro‐optical properties of light‐emitting polymers containing oxadiazole derivatives for light‐emitting diodes applications |
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| Authors: | Sung‐Chul Kim Seung‐Min Park Jin Soo Park Seung‐Joon Lee Sung‐Ho Jin Yeong‐Soon Gal Jae Wook Lee |
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| Institution: | 1. Department of Chemistry Education and Interdisciplinary Program of Advanced Information and Display Materials, Pusan National University, Busan 609‐735, Korea;2. Polymer Chemsitry Laboratory, Kyungil University, Hayang 712‐701, Korea;3. Department of Chemistry, Dong‐A University, Busan 604‐714, Korea |
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| Abstract: | Two PPV‐based bipolar polymers containing 1,3,4‐oxadiazole pendant groups were synthesized via the Gilch polymerization reaction for use in light‐emitting diodes (LEDs). The resulting polymers were characterized using 1H and 13C NMR, elemental analysis, DSC, and TGA. These polymers were found to be soluble in common organic solvents and are easily spin‐coated onto glass substrates, producing high optical quality thin films without defects. The electro‐optical properties of ITO/PEDOT/polymer/Al devices based on these polymers were investigated using UV‐visible, PL, and EL spectroscopy. The turn‐on voltages of the OC1Oxa‐PPV and OC10Oxa‐PPV devices were found to be 8.0 V. The maximum brightness and luminescence efficiency of the OC1Oxa‐PPV device were found to be 544 cd/m2 at 19 V and 0.15 cd/A, respectively. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1098–1110, 2008 |
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| Keywords: | fluorescence light‐emitting diodes (LED) luminescence |
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