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Polymer matrix based phosphorescent emitters

: Krueger, H.; Thesen, M.; Janietz, S.; Fischer, B.; Wedel, A.

Society for Information Display -SID-:
Proceedings of the 25th International Display Research Conference. CD-ROM : 20 - 22 September 2005, Edinburgh
ISSN: 1083-1312
Internatioanl Display Research Conference <25, 2005, Edinburgh>
EuroDisplay <25, 2005, Edinburgh>
Conference Paper
Fraunhofer IAP ()

In this paper, we describe the synthesis of a new polyvinyl-carbazole with blocked 3,6-position. As a result of the substitution with tert.-butyl groups the HOMO energy level is shifted to -5,4 eV which allows a better adaption to the work function of PEDOT/PSS. The improvement in hole injection leads to a more efficient device and therefore it is not necessary to add any further hole transporting material.