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Dr. Sung-Yu Ku, Prof. Wen-Yi Hung, Chung-Wen Chen, Shih-Wei Yang, Ejabul Mondal, Prof. Yun Chi and Prof. Ken-Tsung Wong Spiro-Configured Bipolar Host Materials for Highly Efficient Electrophosphorescent Devices Chemistry – An Asian Journal 7

Version of Record online: 13 OCT 2011 | DOI: 10.1002/asia.201100467

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Bipolar personalities: Spiro-configured bipolar compounds are excellent host materials for iridium- and osmium-based green and red electrophosphorescent devices. The device incorporating D2 ACN doped with the red osmium emitter gave a saturated red electrophosphorescence with CIE coordinates of (0.65, 0.35) and remarkably high efficiencies of 20.3 % (21 cd A−1) and 13.5 Lm W−1 at a practical brightness of 1000 cd m−2.

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