- Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters.
Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters.
Advanced materials (Deerfield Beach, Fla.) (2015-02-14)
Qisheng Zhang, Daniel Tsang, Hirokazu Kuwabara, Yasuhiro Hatae, Bo Li, Takehiro Takahashi, Sae Youn Lee, Takuma Yasuda, Chihaya Adachi
PMID25678335
ABSTRACT
The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19%, which is comparable to the best doped OLEDs.
MATERIALS