C
Chihaya Adachi
Researcher at Kyushu University
Publications - 976
Citations - 73313
Chihaya Adachi is an academic researcher from Kyushu University. The author has contributed to research in topics: OLED & Electroluminescence. The author has an hindex of 112, co-authored 908 publications receiving 61403 citations. Previous affiliations of Chihaya Adachi include Ricoh & Universal Display Corporation.
Papers
More filters
Journal ArticleDOI
Highly efficient organic light-emitting diodes from delayed fluorescence
Hiroki Uoyama,Kenichi Goushi,Kenichi Goushi,Katsuyuki Shizu,Hiroko Nomura,Chihaya Adachi,Chihaya Adachi +6 more
TL;DR: A class of metal-free organic electroluminescent molecules in which the energy gap between the singlet and triplet excited states is minimized by design, thereby promoting highly efficient spin up-conversion from non-radiative triplet states to radiative singlet states while maintaining high radiative decay rates.
Journal ArticleDOI
Nearly 100% internal phosphorescence efficiency in an organic light emitting device
TL;DR: In this paper, the authors demonstrate very high efficiency electrophosphorescence in organic light-emitting devices employing a phosphorescent molecule doped into a wide energy gap host, achieving a maximum external quantum efficiency of 19.0±1.0 and luminous power efficiency of 60±5 lm/W.
Journal ArticleDOI
Highly phosphorescent bis-cyclometalated iridium complexes: synthesis, photophysical characterization, and use in organic light emitting diodes.
Sergey Lamansky,Peter I. Djurovich,Drew Murphy,Feras Abdel-Razzaq,Hae-Eun Lee,Chihaya Adachi,Paul E. Burrows,Paul E. Burrows,Stephen R. Forrest,Mark E. Thompson +9 more
TL;DR: The synthesis and photophysical study of a family of cyclometalated iridium(III) complexes are reported, and three of the C(**)N2Ir(acac) complexes were used as dopants for organic light emitting diodes (OLEDs) and show some of the highest efficiencies reported for organic Light Emitting Diodes.
Journal ArticleDOI
Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence
Qisheng Zhang,Bo Li,Shuping Huang,Hiroko Nomura,Hiroyuki Tanaka,Chihaya Adachi,Chihaya Adachi +6 more
TL;DR: In this article, a blue organic light-emitting diodes that harness thermally activated delayed fluorescence was realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance.
Journal ArticleDOI
Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation
TL;DR: Baldo et al. as mentioned in this paper showed that the observed decrease in electrophosphorescent intensity in organic light-emitting devices at high current densities is principally due to triplet-triplet annihilation.