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An enhanced performance: Electroluminescent devices incorporating a simple carbazole/oxadiazole hybrid as a host for dopants show maximum external quantum efficiencies (ηEQE) as high as 20. 2 % for green and 18. 5 % for deep red electrophosphorescence (see picture, J=current density). The host can be conveniently prepared and has good thermal and morphological stabilities and a high triplet energy level. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2008/z803396ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Tao et al. (Tue,) studied this question.