〒819-0395
福岡市西区元岡744
最先端有機光エレクトロニクス
研究センター
共進化社会システム
イノベーション施設224

Center for Organic Photonics and Electronics Research (OPERA)
Co-Evolutional Social Systems Building #224
744 Motooka, Nishi, Fukuoka
819-0395, Japan

TEL: 092-802-6920
FAX: 092-802-6921

adachi[at]cstf.kyushu-u.ac.jp

 
 

合志 憲一

略歴
2004年 千歳科学技術大学大学院修士課程修了
2006年 千歳科学技術大学大学院博士後期課程修了
2006年 日本学術振興会特別研究員(PD)
2007年 (独)情報通信研究機構・専攻研究員
2008年 東北大学大学院工学研究科応用化学専攻・助教
2009年 九州大学未来化学創造センター・学術研究員
2010年
11月
九州大学工学研究院応用化学部門・助教
学位
博士(理工学)(千歳科学技術大学 2006年)
所属学会
応用物理学会
研究分野
有機光エレクトロニクス、有機光物理
趣味
カメラ、旅行
コメント
頑張ります

研究成果

論文発表

[46] Markedly Improved Performance of Optically Pumped Organic Lasers with Two-Dimensional Distributed-Feedback Gratings

Chathuranganie A. M. Senevirathne; Atula S.D. Sandanayaka; Buddhika S.B. Karunathilaka; Takashi Fujihara; Fatima Bencheikh; Chuanjiang Qin; Kenichi Goushi; Toshinori Matsushima; Chihaya Adachi

ACS photonics, 2021

DOI: http://dx.doi.org/10.1021/acsphotonics.0c01728

[45] Synthesis and Characterization of 5,5′-Bitetracene

Masashi Mamada; Kenichi Goushi; Ryota Nakamura; Hironori Kaji; Chihaya Adachi

Chemistry Letters, 50, 4, 800 – 803, 2021

DOI: https://doi.org/10.1246/cl.200909

[44] Realizing near-infrared laser dyes through a shift in excited state absorption

Reiko Aoki; Ryutaro Komatsu; Kenichi Goushi; Masashi Mamada; Soo Young Ko; Jeong Weon Wu; Virginie Placide; Anthony D’Aléo; Chihaya Adachi

Advanced Optical Materials, 2001947, 2021

DOI: https://doi.org/10.1002/adom.202001947

[43] Suppression of external quantum efficiency rolloff in organic light emitting diodes by scavenging triplet excitons

Buddhika S. B. Karunathilaka; Umamahesh Balijapalli; Chathuranganie A. M. Senevirathne; Seiya Yoshida; Yu Esaki; Kenichi Goushi; Toshinori Matsushima; Atula S. D. Sandanayaka; Chihaya Adachi

Nat Commun, 11, 4926, 2020

DOI: https://doi.org/10.1038/s41467-020-18292-0

[42] An organic laser dye having a small singlet-triplet energy gap makes the selection of a host material easier

Buddhika S. B. Karunathilaka; Umamahesh Balijapalli; Chathuranganie A. M. Senevirathne; Yu Esaki; Kenichi Goushi; Toshinori Matsushima; Atula S. D. Sandanayaka; Chihaya Adachi

Advanced Functional Materials, 2001078, 2020

DOI: https://doi.org/10.1002/adfm.202001078

[41] Triplet management for efficient perovskite light-emitting diodes

Chuanjiang Qin ; Toshinori Matsushima; William J. Potscavage Jr; Atula S. D. Sandanayaka, ; Matthew R. Leyden; Fatima Bencheikh; Kenichi Goushi; Fabrice Mathevet; Benoît Heinrich; Go Yumoto; Yoshihiko Kanemitsu; Chihaya Adachi

Nature Photonics , 14, 70 – 75, 2020

DOI: https://doi.org/10.1038/s41566-019-0545-9

[40] Intersystem Crossing Rate in Thermally Activated Delayed Fluorescence Emitters

Takashi Kobayashi; Daisuke Kawate; Akitsugu Niwa; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Physica Status Solidi A, 217, 3, 1900616, 2020

DOI: https://doi.org/10.1002/pssa.201900616

[39] Observation of Nonradiative Deactivation Behavior from Singlet and Triplet States of Thermally Activated Delayed Fluorescence Emitters in Solution

Naoto Notsuka; Hajime Nakanotani; Hiroki Noda; Kenichi Goushi; Chihaya Adachi

Phys. Chem. Lett. , 11, 2, 562 – 566, 2020

DOI: https://doi.org/10.1021/acs.jpclett.9b03302

[38] Triplet–triplet upconversion enhanced by spin–orbit coupling in organic light-emitting diodes

Ryota Ieuji; Kenichi Goushi; Chihaya Adachi

Nature Communications, 10, 5283, 2019

DOI: https://doi.org/10.1038/s41467-019-13044-1

[37] Indication of current-injection lasing from an organic semiconductor

Atula S. D. Sandanayaka; Toshinori Matsushima; Fatima Bencheikh; Shinobu Terakawa; William J. Potscavage Jr.; Chuanjiang Qin; Takashi Fujihara; Kenichi Goushi; Jean-Charles Ribierre; Chihaya Adachi

Applied Physics Express, 12, 6, 061010, 2019

DOI: https://doi.org/10.7567/1882-0786/ab1b90

[36] Distributed Feedback Lasers and Light-Emitting Diodes Using 1-Naphthylmethylamnonium Low-Dimensional Perovskite

Matthew R. Leyden; Shinobu Terakawa; Toshinori Matsushima; Shibin Ruan; Kenichi Goushi; Morgan Auffray; Atula S. D. Sandanayaka; Chuanjiang Qin; Fatima Bencheikh; Chihaya Adachi

ACS Photonics, 6, 2, 460 – 466, 2019

DOI: http://dx.doi.org/10.1021/acsphotonics.8b01413

[35] Triplet-triplet annihilation in a thermally activated delayed fluorescence emitter lightly doped in a host

Akitsugu Niwa; Shota Haseyama; Takashi Kobayashi; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Appl. Phys. Lett., 113, 083301, 2018

DOI: https://doi.org/10.1063/1.5025870

[34] Enhanced Electroluminescence from Organic Light-Emitting Diodes with an Organic-Inorganic Perovskite Host Layer

Toshinori Matsushima; Chuanjiang Qin; Kenichi Goushi; Fatima Bencheikh; Takeshi Komino; Matthew Leyden; Atula S. D. Sandanayaka; Chihaya Adachi

Adv. Mater., 30, 38, 1802662, 2018

DOI: https://doi.org/10.1002/adma.201802662

[33] Observation of spontaneous orientation polarization in evaporated films of organic light-emitting diode materials

Kohei Osada; Kenichi Goushi; Hironori Kaji; Chihaya Adachi; Hisao Ishii; Yutaka Noguchi

Org. Electron., 58, 313 – 317, 2018

DOI: https://doi.org/10.1016/j.orgel.2018.04.026

[32] Emission properties of thermally activated delayed fluorescence emitters: analysis based on a four level model considering a higher triplet excited state

Takashi Kobayashi; Akitsugu Niwa; Shota Haseyama; Kensho Takaki; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Photon. Energy, 8, 3, 032104, 2018

DOI: http://dx.doi.org/10.1117/1.JPE.8.032104

[31] Confinement of long-lived triplet excitons in organic semiconducting host-guest systems

Naoto Notsuka; Ryota Kabe; Kenichi Goushi; Chihaya Adachi

Advanced Functional Materials, 27, 40, 1703902, 2017

DOI: https://doi.org/10.1002/adfm.201703902

[30] Toward continuous-wave operation of organic semiconductor lasers

Atula S. D. Sandanayaka; Toshinori Matsushima; Fatima Bencheikh; Kou Yoshida; Munetomo Inoue; Takashi Fujihara; Kenichi Goushi; Jean-Charles Ribierre; Chihaya Adachi

Science Advances, 3, 4, e1602570, 2017

DOI: http://dx.doi.org/10.1126/sciadv.1602570

[29] Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix

Shota Haseyama; Akitsugu Niwa; Takashi Kobayashi; Takashi Nagase; Kenichi Goushi; Chihaya Adachi ; Hiroyoshi Naito

Nanoscale Research Letters, 12, 268, 2017

DOI: http://dx.doi.org/10.1186/s11671-017-2012-1

[28] Contributions of a Higher Triplet Excited State to the Emission Properties of a Thermally Activated Delayed-Fluorescence Emitter

Takashi Kobayashi; Akitsugu Niwa; Kensho Takaki; Shota Haseyama; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Phys. Rev. Applied, 7, 034002, 2017

DOI: https://doi.org/10.1103/PhysRevApplied.7.034002

[27] Photoluminescence in a Thermally Activated Delayed Fluorescence Emitter for Organic Light-emitting Diodes

Akitsugu Niwa; Kensho Takaki; Takashi Kobayashi; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Journal of the Imaging Society of Japan, 55, 2, 143 – 148, 2016

DOI: http://doi.org/10.11370/isj.55.143

[26] Quasi-Continuous-Wave Organic Thin-film Distributed Feedback Laser

Atula S. D. Sandanayaka; Kou Yoshida; Munetomo Inoue; Chuanjiang Qin; Kenichi Goushi; Jean-Charles Ribierre; Toshinori Matsushima; Chihaya Adachi

Advanced Optical Materials, 4, 6, 834 – 839, 2016

DOI: http://dx.doi.org/10.1002/adom.201600006

[25] Comparison of transient state and steady state exciton–exciton annihilation rates based on Förster-type energy transfer

Toshiya Yonehara; Kenichi Goushi; Tomoaki Sawabe; Isao Takasu; Chihaya Adachi

Jpn. J. Appl. Phys, 54, 071601, 2015

DOI: http://dx.doi.org/10.7567/JJAP.54.071601

[24] Charge Carrier Dynamics and Degradation Phenomena in Organic Light-emitting Diodes Doped by a Thermally Activated Delayed Fluorescence Emitter

Yutaka Noguchi; Hyung-Jun Kim; Ryuta Ishino; Kenichi Goushi; Chihaya Adachi; Yasuo Nakayama; Hisao Ishii

Org. Elect., 17, 184 – 191, 2015

DOI: http://www.sciencedirect.com/science/article/pii/S1566119914005576

[23] Highly Efficient Thermally Activated Delayed Fluorescence Emitters with Small Singlet–Triplet Energy Gap and Large Oscillator Strength

Yuta Sagara; Katsuyuki Shizu; Hiroyuki Tanaka; Hiroshi Miyazaki; Kenichi Goushi; Hironori Kaji; Chihaya Adachi

Chem. Lett., 44, 360 – 362, 2015

DOI: http://doi.org/10.1246/cl.141054

[22] Temperature dependence of photoluminescence properties in a thermally activated delayed fluorescence emitter

Akitsugu Niwa; Takashi Kobayashi; Takashi Nagase; Kenichi Goushi; Chihaya Adachi; Hiroyoshi Naito

Applied Physics Letters, 104, 213303, 2014

DOI: http://dx.doi.org/10.1063/1.4878397

[21] Influence of Host Matrix on Thermally-Activated Delayed Fluorescence: Effects on Emission Lifetime, Photoluminescence Quantum Yield, and Device Performance

Gábor Méhes; Kenichi Goushi; William J. Potscavage, Jr.; Chihaya Adachi

Org. Elect., 15, 9, 2027 – 2037, 2014

DOI: http://www.sciencedirect.com/science/article/pii/S1566119914002067

[20] Reduced amplified spontaneous emission threshold in organic semiconductor laser structure with relaxed roll-off characteristics under high current densities

Munetomo Inoue; Kenichi Goushi; Kuniaki Endo; Hiroko Nomura; Chihaya Adachi

Journal of Luminescence, 143, 754 – 758, 2013

DOI: http://authors.elsevier.com/sd/article/S0022231313002123

[19] Highly efficient organic light-emitting diodes from delayed fluorescence

Hiroki Uoyama; Kenichi Goushi; Katsuyuki Shizu; Hiroko Nomura; Chihaya Adachi

Nature, 492, 234 – 238, 2012

DOI: http://dx.doi.org/10.1038/nature11687

[18] Efficient organic light-emitting diodes through up-conversion from triplet to singlet excited states of exciplexes

Kenichi Goushi; Chihaya Adachi

Appl. Phys. Lett., 101, 023306, 2012

DOI: http://apl.aip.org/resource/1/applab/v101/i2/p023306_s1

[17] Triplet Exciton Confinement in Green Organic Light-Emitting Diodes Containing Luminescent Charge-Transfer Cu(I) Complexes

Qisheng Zhang; Takeshi Komino; Shuping Huang; Shigeyuki Matsunami; Kenichi Goushi; Chihaya Adachi

Adv. Funct. Mater., 22, 2327 – 2336, 2012

DOI: http://onlinelibrary.wiley.com/doi/10.1002/adfm.201101907/abstract

[16] Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion

Kenichi Goushi; Kou Yoshida; Keigo Sato; Chihaya Adachi

Nat. Photon., 6, 253 – 258, 2012

DOI: http://dx.doi.org/10.1038/nphoton.2012.31

[15] Two-dimensional orientation control of organic semiconducting amorphous films by mechanical brushing

Toshiharu Arai; Kenichi Goushi; Hiroko Nomura; Tomohiko Edura; Chihaya Adachi

Appl. Phys. Lett., 99, 053303, 2011

DOI: http://link.aip.org/link/?APL/99/053303

[14] Improvement of electroluminescence performance of organic light emitting diodes with a liquid emitting layer by introduction of electrolyte and a hole-blocking layer

Shuzo Hirata; Korefumi Kubota; Heo Hyo Jung; Osamu Hirata; Kenichi Goushi; Masayuki Yahiro; Chihaya Adachi

Adv. Mater., 23, 889 – 893, 2011

DOI: http://onlinelibrary.wiley.com/doi/10.1002/adma.201003505/abstract

[13] Organic field effect transistor using pentacene single crystals grown by a liquid-phase crystallization process

Y. Kimura, M. Niwano, N. Ikuma, K. Goushi, and K. Itaya

LANGMUIR, 24, 4861-4863 (2009)

DOI: https://doi.org/10.1021/la900647y

[12] Time-correlated single photon counting system and light-collection system for studying fluorescence emitters under high-vacuum conditions: Use of immersion objective and ionic liquid

Yamada, K. Goushi, and A. Otomo

THIN SOLID FILMS, 518, 432-436 (2009)

DOI: https://doi.org/10.1016/j.tsf.2009.07.002

[11] Excitation intensity dependence of power-law blinking statistics in nanocrystal quantum dots

K. Goushi, T. Yamada, and A. Otomo

JOURNAL OF PHYSICAL CHEMISTRY C, 113, 20161-20168 (2009)

DOI: https://doi.org/10.1021/jp811448k

[10] Time-correlated single photon counting and optical measurement systems for studying single fluorescent emitters under high vacuum conditions

T. Yamada, K. Goushi, and A. Otomo

THIN SOLID FILMS, 517, 1507-1511 (2008)

DOI: https://doi.org/10.1016/j.tsf.2008.09.029

[9] Charge-carrier injection characteristics at organic/organic heterojunction interfaces in organic light-emitting diodes

Toshinori Matsushima; Kenichi Goushi; Chihaya Adachi

Chem. Phys. Lett., 435, 327 – 330, 2007

DOI: http://dx.doi.org/10.1016/j.cplett.2007.01.010

[8] Spin-relaxation Process of Excited Triplet States of Ir(ppy)3

Kenichi Goushi; Jason Brooks; Julie. J. Brown; Hiroyuki Sasabe; Chihaya Adachi

  1. Photopolym. Sci. Technol., 19, 181 – 186, 2006

DOI: http://dx.doi.org/10.2494/photopolymer.19.181

[7] Phosphorescence Decay Mechanism of Ir(ppy)3 in a Solid Matrix

K. Goushi; H. Sasabe; C. Adachi

J. Photopolym. Sci. Technol., 18, 47 – 50, 2005

DOI: http://dx.doi.org/10.2494/photopolymer.18.47

[6] 100% fluorescence efficiency of 4,4’-bis[(N-carbazole)styryl]biphenyl in a solid film and the very low amplified spontaneous emission threshold

T. Aimono; Y. Kawamura; K. Goushi; H. Yamamoto; H. Sasabe; C. Adachi

Appl. Phys. Lett., 86, 071110, 2005

DOI: http://doi.org/10.1063/1.1867555

[5] 100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films

Y. Kawamura; K. Goushi; J. Brooks; J. J. Brown; H. Sasabe; C. Adachi

Appl. Phys. Lett., 86, 071104, 2005

DOI: http://doi.org/10.1063/1.1862777

[4] Unusual Phosphorescence Characteristics of Ir(ppy)3 in a Solid Matrix at Low Temperatures

K. Goushi; Y. Kawamura; H. Sasabe; C. Adachi

Jpn. J. Appl. Phys. Part II, 43, L937 – 939, 2004

DOI: http://dx.doi.org/10.1143/JJAP.43.L937

[3] Triplet exciton confinement and unconfinement by adjacent hole-transport layers

K. Goushi; R. Kwong; J. J. Brown; H. Sasabe; C. Adachi

J. Appl. Phys., 95, 7798 – 7802, 2004

DOI: http://doi.org/10.1063/1.1751232

[2] Ultraviolet amplified spontaneous emission from thin films of 4,4’-bis(9-carbazolyl)-2,2’- biphenyl and the derivatives

Y. Kawamura; H. Yamamoto; K. Goushi; H. Sasabe; H. Yoshizaki; C. Adachi

Appl. Phys. Lett., 84, 2724 – 2726, 2004

DOI: http://doi.org/10.1063/1.1695091

[1] High-Efficiency Organic Electrophosphorescent Diodes Using 1, 3, 5-Triazine Electron Transport Materials

H. Inomata; K. Goushi; T. Masuko; T. Konno; T. Imai; H. Sasabe; J. J. Brown; C. Adachi

Chem. Mat., 16, 1285 – 1291, 2004

DOI: http://dx.doi.org/10.1021/cm034689t