화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.280, 349-356, 1996
Temperature-Change in Structure of Bilayers of Alq/TPD-Doped Polycarbonate Films for Organic Electroluminescent Devices
The change of surface and interface in bilayers of Alq (Tris-(8-hydroxyquinoline) aluminum)/TPD (N,N’-diphenyl-N,N’-bis-(3-methylphenyl)-(1,1’-biphenyl)-4, 4’-diamine)-doped polycarbonate (PC) films for organic electroluminescent devices was characterized by atomic force microscopy (AFM), SEM, and fluorescence microscopy, in the temperature range from R.T. to 250 degrees C under the air. As single layer films, the dip-coated TPD-doped PC film on indium-tin oxide (ITO)-coated glass and the vapor-deposited Alq films on various substrates showed good thermal stability compared with the vapor-deposited TPD film itself. However, in the bilayered structure of Alq/TPD-doped PC films, the Alq film as the overlaying layer was deteriorated readily, which was accelerated with increasing temperature and TPD concentration in the TPD-doped PC film.