We have synthesized the series of carbazole-based polymeric host materials, P1-P5  , through free radical polymerization of monomers containing arylsilane-modified and 3,6-disubstituted carbazole frameworks , respectively. Polymer containing the tetrahedral structural motif of the silicon atom would interrupt conjugation lengths between carbazole and aromatic ring to raise triplet energy level. The resultant of P1-P5  (ET > 2.67 eV) which compared with PVK (ET of 2.5 eV) were sufficiently high to serve as appropriate hosts for blue-emitting phosphors. Employing P1   doped with FIrpic as the emissive layer, we fabricated of ITO/PEDOT/P1  :FIrpic 20 %:TRZ 40 %/Mg/Ag which has maximum luminance 2460 cd/m2 and maximum current efficiency 4.93 cd/A. In addition, we incorporated a red phosphorescent dopant [Ir(2-phq)2acac] into the blue device to fabricate a white phosphorescent organic light-emitting device, which exhibited satisfactory efficiencies (4000 cd/m2, 5.13 cd/A) with the Commission Internationale de L'eclairage (CIE) coordinates of (0.25, 0.30). 

Polymers containing pendent arylsilane-modified carbazole and the application on blue and white phosphorescent polymer light emitting diodes

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.