Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials
Wheeler, David L.
Tomlinson, Aimee L.
MetadataShow full item record
Citation (published version)Ramiro Chavez, Min Cai, Brian Tlach, David L Wheeler, Rajiv Kaudal, Ayuna Tsyrenova, Aimee L Tomlinson, Ruth Shinar, Joseph Shinar, Malika Jeffries-EL. 2016. "Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials." JOURNAL OF MATERIALS CHEMISTRY C, Volume 4, Issue 17, pp. 3765 - 3773 (9).
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.
RightsThis article is licensed under a Creative Commons Attribution 3.0 Unported Licence.