Date：2017-07-04 |
Views：1721 |
【Academic writing Sharing 20170704】 |
Rigidity-Induced Delayed Fluorescence by Ortho-Donor-Appended Triarylboron Compounds: Record-High Efficiency in Pure Blue Fluorescent Organic Light-Emitting Diodes
Article excerpt is from: Young Hoon Lee, Sunghee Park, Jihun Oh, Jong Won Shin, Jaehoon Jung, Seunghyup Yoo, and Min Hyung Lee
ACS Appl. Mater. Interfaces, in press, 2017
ortho-D−A compounds (PXZoB, DPAoB, CzoB) composed of a dimesitylphenylboron (PhBMes2) acceptor and phenoxazine (PXZ), diphenylamine (DPA) or carbazole (Cz) donors can display strong TADF. Using the ortho-D−A compounds as emitters, highly efficient orange, greenish-blue, and pure-blue TADF-OLEDs were realized. In particular, the pure-blue OLEDs incorporating a CzoB emitter exhibited a record-high ηEQE of 22.6% with CIE of (0.139, 0.150), which was further improved to 24.1% with an optimized ITO thickness.
