%0 Journal Article %T Engineering of Mixed Host for High External Quantum Efficiency above 25% in Green Thermally Activated Delayed Fluorescence Device %A Kim, Bo Seong %A Lee, Jun Yeob %J Advanced Functional Materials %V 24 %N 25 %P 3970-3977 %@ 1616-301X %D 2014-07-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve