Influence of dipole moments on light-emitting features of cardo-type 1H-pyrazolo[3,4-b]quinolines |
| |
Authors: | E Gondek A Danel M Pokladko E Kulig |
| |
Institution: | a Institute of Physics, Cracow University of Technology, Podchorazych 1, 30-084 Krakow, Poland b Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, Kraków, Poland c Department of Chemistry, Agricultural University of Krakow, Balicka 122, Krakow 31-149, Poland d Chemical Department, Silesian Technological University, ul. Strzody 9, Gliwice, Poland |
| |
Abstract: | Several 1H-pyrazolo3,4-b]quinoline derivatives were synthesized from 9,9′-di(p-aminophenyl)fluorene as possible dye chromophore for the organic light-emitting diodes. All the compounds exhibit strong fluorescence in solution and in solid state as well. The maximally achieved brightness was 65 Cd/m2 and spectral range of electroluminescence (EL) covers the wavelength ranges from 420 up to 470 nm. The prepared compounds were used as dye luminophores in poly(N-vinylcarbazole) (PVK) matrix for single-layer EL light-emitting device. Principal goal of the work consists in an establishment of a possibility to operate by their light-emitting features (spectral positions of emitting lines, efficiency of electroluminescence, brightness, etc.) by appropriate changes of state dipole moments of the particular chromophore determined by semi-empirical quantum chemical calculations. The principal physical mechanism of such effects is explained within dipole-dipole interactions between the dye chromophores and PVK polymer chains. |
| |
Keywords: | Organic light-emitting diodes Optical materials |
本文献已被 ScienceDirect 等数据库收录! |
|