한국정보디스플레이학회:학술대회논문집
- 2009.10a
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- Pages.1418-1421
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- 2009
Synthesis and Characterization of Red Light-Emitting Random Copolymers
- Lee, Yeong-Beom (LCD Division, Samsung Electronics Co. Ltd., LCD Division, Device Solution Business, Samsung Electronics Co. Ltd.) ;
- Shim, Hong-Ku (Department of Chemistry, Korea Advanced Institute of Science and Technology)
- Published : 2009.10.12
Abstract
A series of new light-emitting random copolymers with fully conjugated structure was prepared, for the first time through the well-known Gilch polymerization between 1,4-bis(chloromethyl)-2-ethylhexyloxy-5-methoxybenzene and 2,5-bis(bromomethyl)thiophene monomers in different ratios. The synthesized polymers (on thin film) showed the maximum wavelength of UV-visible absorbance and photoluminescence (PL) near 500 nm and near 600 nm, respectively. A single-layer light-emitting diode device, which has a simple ITO (indium-tin oxide)/polymer/Al configuration, was fabricated by spin-coating of polymers and then vacuum evaporation of Al metal. The threshold bias of PMEHPVTVs was in the range of 3.5-10 V. As in the PL spectra, the maximum wavelength of light emission near 600 nm was also shown in electroluminescence (EL) spectra of PMEHPVTVs when the operating voltage was about 7 - 14 V.
Keywords