Efficient fluorescent deep-blue and hybrid white emitting devices based on carbazole/benzimidazole compound
Jabbour, Ghassan E.
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AbstractWe report the synthesis, photophysics, and electrochemical characterization of carbazole/benzimidazole-based compound (Cz-2pbb) and efficient fluorescent deep-blue light emitting devices based on Cz-2pbb with the peak external quantum efficiency of 4.1% and Commission Internationale dÉnclairage coordinates of (0.16, 0.05). Efficient deep-blue emission as well as high triplet state energy of Cz-2pbb enables fabrication of hybrid white organic light emitting diodes with a single emissive layer. Hybrid white emitting devices based on Cz-2pbb show the peak external quantum efficiency exceeding 10% and power efficiency of 14.8 lm/W at a luminance of 500 cd/m2. © 2011 American Chemical Society.
SponsorsThe authors acknowledge the FiDiPro program, Academy of Finland, and funding from Nitto Denko Technical Corporation.
PublisherAmerican Chemical Society (ACS)