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Synthesis and characterization of poly(1,4-phenylenevinylene-alt-2,5-thienylenevinylene) derivatives for organic light-emitting diodes |
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| Authors: | Sung-Ho Jin Chan-Koo Hwang Dong-Kyu Park Dong-Myung Shin |
| Affiliation: | a Department of Chemistry Education and Center for Plastic Information System, Pusan National University, Jangeon-dong, Geumjeong-gu, Pusan 609-735, South Korea b Polymer Chemsitry Laboratory, Kyungil University, Hayang 712-701, South Korea c Department of Chemistry and Physics, Kyungsung University, Busan 608-736, South Korea d Department of Chemical Engineering, Hongik University, Seoul 121-791, South Korea e Department of Chemistry, Dong-A University, Busan 604-714, South Korea |
| Abstract: | A new series of alternating copolymers composed of 1,4-phenylenevinylene and 2,5-thienylenylvinylene repeating units with various side chain substituents were synthesized via the Heck coupling reaction for use in light-emitting diodes (LEDs). The resulting copolymers were characterized using 1H- and 13C-NMR, 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 were investigated using UV-VIS, PL and EL spectroscopy. The turn-on voltages of these devices were found to be in the range 4-16 V, with a maximum brightness of about 2900 cd/m2 at 12 V. |
| Keywords: | Light-emitting diode Heck reaction 1,4-Phenylenevinylene 2,5-Thienylenevinylene |
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