Luminous butterflies: efficient exciton harvesting by benzophenone derivatives for full-color delayed fluorescence OLEDs.
Butterfly-shaped luminescent benzophenone derivatives with small energy gaps between their singlet and triplet excited states are used to achieve efficient full-color delayed fluorescence. Organic light-emitting diodes (OLEDs) with these benzophenone derivatives doped in the emissive layer can generate electroluminescence ranging from blue to orange-red and white, with maximum external quantum efficiencies of up to 14.3%. Triplet excitons are efficiently harvested through delayed fluorescence channels.
Department of Applied Chemistry and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 (Japan) http://www.cstf.kyushu-u.ac.jp/∼adachilab/
Sae Youn
SY
Lee
Takuma
T
Yasuda
Yu Seok
YS
Yang
Qisheng
Q
Zhang
Chihaya
C
Adachi
D001577:Benzophenones / Q000737:chemistry*; D005453:Fluorescence; D015394:Molecular Structure; D013997:Time Factors
D001577:Benzophenones; C047723:benzophenone
benzophenone; donor-acceptor systems; organic light-emitting diodes; organic semiconductors; photochemistry