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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
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Journal ArticleDOI
Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 %
Katsuaki Suzuki,Shosei Kubo,Katsuyuki Shizu,Tatsuya Fukushima,Atsushi Wakamiya,Yasujiro Murata,Chihaya Adachi,Hironori Kaji +7 more
TL;DR: New donor-acceptor triarylboron emitters that show thermally activated delayed fluorescence and high photoluminescence quantum yields of 87-100 % in host matrices are designed and synthesized.
Journal ArticleDOI
High efficiency pure blue thermally activated delayed fluorescence molecules having 10H-phenoxaborin and acridan units
TL;DR: Pure blue emission peaking at around 450 nm with a high external electroluminescence quantum efficiency of around 20% was demonstrated.
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Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states
Lin-Song Cui,Alexander J. Gillett,Shoufeng Zhang,Shoufeng Zhang,Hao Ye,Yuan Liu,Xian Kai Chen,Zesen Lin,Emrys W. Evans,William K. Myers,Tanya K. Ronson,Hajime Nakanotani,Sebastian Reineke,Jean-Luc Brédas,Chihaya Adachi,Richard H. Friend +15 more
TL;DR: In this paper, a TADF molecule with multiple donor units that form charge-resonance-type hybrid triplet states leading to a small singlet-triplet energy splitting, large spin-orbit couplings, and a dense manifold of triplets states energetically close to the singlets was presented.
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Efficient organic light-emitting diodes through up-conversion from triplet to singlet excited states of exciplexes
Kenichi Goushi,Chihaya Adachi +1 more
TL;DR: In this paper, an enhanced electroluminescence efficiency was achieved in organic light-emitting diodes through delayed fluorescence of the exciplex state formed between 4,4′, 4′-4′-tris[3-methylphenyl(phenyl)amino]-triphenylamine (m-MTDATA) as an electron-donating material and 2,8-bis(diphenylphosphoryl)dibenzo-[b,d]thiophene (PPT) as a electron-accept
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1,8-Naphthalimides in phosphorescent organic LEDs: the interplay between dopant, exciplex, and host emission.
TL;DR: Four different 1,8-naphthalimide derivatives were examined in phosphorescent organic light emitting diodes (OLEDs), and estimates of HOMO, LUMO, and excited-state energies were used to explain the observed spectral properties of these devices.