Kyushu University

Koala Tech Inc.

Kyulux, Inc.

Kou Yoshida

Chihaya Adachi

Kenichi Goushi

Toshinori Matsushima

Sangarange Don Atula Sandanayaka

Fatima Bencheikh

Jean-Charles Ribierre

Takashi Fujihara

Disclosed are a current excitation type organic semiconductor laser containing a pair of electrodes, an organic laser active layer and an optical resonator structure between the pair of electrodes and a laser having an organic layer on a distributed feedback grating structure. The lasers include a continuous-wave laser, a quasi-continuous-wave laser and an electrically driven semiconductor laser diode.

Continuous-wave organic thin-film distributed feedback laser and electrically driven organic semiconductor laser diode

A delayed fluorescence material containing a mixture of an acceptor compound and a donor compound that satisfies the following formulae (1) to (4):&#x3e;0.2 eV&#x2003;&#x2003;(1)&#x2267;0.2 eV&#x2003;&#x2003;(2)|LUMO|&#x3e;2.0 eV&#x2003;&#x2003;(3)|HOMO|&#x2266;5.3 eV&#x2003;&#x2003;(4)wherein Trepresents the excited triplet energy of the acceptor compound; Trepresents the excited triplet energy defined of the donor compound; Srepresents the excited singlet energy of the exciplex; LUMOrepresents the energy level of LUMO of the acceptor compound; and HOMOrepresents the energy level of HOMO of the donor compound.

Delayed fluorescence material and organic electroluminescence device

Growing community of inventors

Fukuoka, Japan

Kou Yoshida