| Literature DB >> 28968060 |
Hyoungcheol Lim1, Hyun Shin1, Kwon-Hyeon Kim1, Seung-Jun Yoo1, Jin-Suk Huh1, Jang-Joo Kim1,2.
Abstract
The use of exciplex hosts is attractive for high-performance phosphorescent organic light-emitting diodes (PhOLEDs) and thermally activated delayed fluorescence OLEDs, which have high external quantum efficiency, low driving voltage, and low efficiency roll-off. However, exciplex hosts for deep-blue OLEDs have not yet been reported because of the difficulties in identifying suitable molecules. Here, we report a deep-blue-emitting exciplex system with an exciplex energy of 3.0 eV. It is composed of a carbazole-based hole-transporting material (mCP) and a phosphine-oxide-based electron-transporting material (BM-A10). The blue PhOLEDs exhibited maximum external quantum efficiency of 24% with CIE coordinates of (0.15, 0.21) and longer lifetime than the single host devices.Entities:
Keywords: blue phosphorescent OLED; charge balance; deep blue exciplex; exciplex host; high triplet level; operational lifetime
Year: 2017 PMID： 28968060 DOI： 10.1021/acsami.7b10914
Source DB: PubMed Journal: ACS Appl Mater Interfaces ISSN： 1944-8244 Impact factor: 9.229