Ramiro Chavez publishes “hot paper” in Journal of Materials Chemistry C
Ramiro Chavez publishes a “hot paper” in the Journal of Materials Chemistry C. The paper reports the use of novel cross-conjugated molecules shows for use in deep-blue OLEDs.
Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials – Journal of Materials Chemistry C (RSC Publishing)
Four new cross-conjugated small molecules based on a central benzo[1,2-d:4,5-d′]bisoxazole moiety possessing semi-independently tunable HOMO and LUMO levels were synthesized and the properties of these materials were evaluated experimentally and theoretically. The molecules were thermally stable with 5% weight loss occurring well above 350 °C. The cruciforms all exhibited blue emission in solution ranging from 433–450 nm. Host–guest OLEDs fabricated from various concentrations of these materials using the small molecule host 4,4′-bis(9-carbazolyl)-biphenyl (CBP) exhibited deep blue-emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.15 ≤ x ≤ 0.17, 0.05 ≤ y ≤ 0.11), and maximum luminance efficiencies as high as ∼2 cd A−1. These results demonstrate the potential of benzobisoxazole cruciforms as emitters for developing high-performance deep blue OLEDs.
http://pubs.rsc.org/en/content/articlelanding/2016/tc/c5tc03622d#!divAbstract