Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

Provided is an OLED having an emissive region having a first compound and a second compound. The first compound is capable of energy transfer to the second compound. The first compound is capable of functioning as a TADF emitter in an OLED at room temperature, wherein the first compound includes a boron atom possessing a trigonal planar coordination geometry. The first compound has a first singlet state S.sub.1, a first triplet state T.sub.1, and a second triplet state T.sub.2 energies; and the second compound is a fluorescent compound functioning as an emitter in the OLED at room temperature.