Ramiro Chavez publishes a \u201chot paper\u201d in the Journal of Materials Chemistry C. The paper reports the use of novel cross-conjugated molecules shows for use in deep-blue OLEDs.<\/p>\n
Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials – Journal of Materials Chemistry C (RSC Publishing)<\/span><\/p>\n <\/span>Four new cross-conjugated small molecules based on a central benzo[1,2-d<\/i>:4,5-d<\/i>\u2032]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 \u00b0C. The cruciforms all exhibited blue emission in solution ranging from 433\u2013450 nm. Host\u2013guest OLEDs fabricated from various concentrations of these materials using the small molecule host 4,4\u2032-bis(9-carbazolyl)-biphenyl (CBP) exhibited deep blue-emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.15 \u2264 x<\/i> \u2264 0.17, 0.05 \u2264 y<\/i> \u2264 0.11), and maximum luminance efficiencies as high as \u223c2 cd A<\/span>\u22121<\/sup><\/span>. These results demonstrate the potential of benzobisoxazole cruciforms as emitters for developing high-performance deep blue OLEDs.<\/span><\/p>\n