【Academic writing Sharing 20180126】
Highly efficient soluble blue delayed fluorescent and hyperfluorescent organic light-emitting diodes by host engineering
Article excerpt is from:Sang Kyu Jeon, Hee-Jun Park, and Jun Yeob Lee
ACS Appl. Mater. Interfaces. 2018, in press
High-efficiency solution-processed blue hyperfluorescent OLEDs with an EQE exceeding 18% and a blue color coordinate of (0.14,0.20) were firstly demonstrated using a soluble DPOBBPE host with a high triplet energy of 3.15 eV, a good solubility of 7.3 wt% in toluene and low surface roughness of 0.18 nm after spin coating. The new host material also demonstrated a state of the art EQE over 25% in solution-processed blue TADF OLEDs. Therefore, the DPOBBPE host can be applied in various blue solution-processed OLEDs involving triplet excitons in the light emission process.