Kyushu University@Center for Future ChemistryKyushu University@Center for Future Chemistry

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Member detailsSeiji OgoChihaya AdachiMasashi Ogawa
Optical Functional Materials Division
@
Chihaya Adachi Specialty - Organic opto-electronics
- Organic semiconductor device characteristics
- Organic photophysical chemistry



Papers/Books
y1z

"Spectrally Narrow Emission at Cutoff Wavelength from Edge of Electrically Pumped Organic Light-Emitting Diodes" Jpn. J. Appl. Phys., 46, L826 (2007)
Daisuke Yokoyama, Hajime Nakanotani, Yousuke Setoguchi, Masato Moriwake, Dai Ohnishi, Masayuki Yahiro, Chihaya Adachi

y2z

Extremely Low-Threshold Amplified Spontaneous Emission of 9,9f-Spirobifluorene Derivatives and Electroluminescence from Field-Effect Transistor Structure Advanced Functional Materials, 17, 2328-2335 (2007).
Hajime Nakanotani, Seiji Akiyama, Dai Ohnishi, Masato Moriwake, Masayuki Yahiro, Toshitada Yoshihara, Seiji Tobita and Chihaya Adachi

y3z

Ambipolar field-effect transistor based on organic-inorganic hybrid structure Appl. Phys. Lett., 90, 262104 (2007).
Hajime Nakanotani, Masayuki Yahiro, Koki Yano and Chihaya Adachi

y4z

Spectrally narrow emission from organic films under continuous-wave excitation Appl. Phys. Lett., 90, 231109 (2007).
H. Nakanotani, C. Adachi, S. Watanabe and R. Katoh

y5z

Ambipolar light-emitting organic field-effect transistors using a wide-band-gap blue-emitting small molecule Appl. Phys. Lett., 90, 171118 (2007)
Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi, Hiroyuki Uchiuzou, Takayoshi Takahashi and Akio Toshimitsu

y6z

A high mobility ambipolar field effect transistor using a 2,6-diphenylbenzo[1,2-b:4,5-bf] diselenophene/fullerene double layer Solid State Comm., 145, 114-117 (2008)
Shohei Kinoshita, Tomo Sakanoue, Masayuki Yahiro, Kazuo Takimiya, Hideaki Ebata, Masaaki Ikeda, Hirokazu Kuwabara, and Chihaya Adachi

y7z

Observation of Extremely High Current Densities on Order of MA/cm2 in Copper Phthalocyanine Thin-Film Devices with Submicron Active Areas Jpn. J. Appl. Phys., 46, L1179-L1181 (2007).
Toshinori Matsushima and Chihaya Adachi

Organic Electronics & Photonics
Organic Electronics & Photonics
 With the aim of developing state-of-the-art organic optical semiconductor devices, the Optical Functional Materials Division conducts comprehensive research and development of organic optical electronics ranging from the synthesis of organic semiconductor materials to the development of devices and the clarification of properties. The division started research and development after Chihaya Adachi came from Chitose Institute of Science and Technology to assume the post of professor on October 2005, and Masayuki Yahiro came from NHK Science & Technical Research Laboratories to assume the post of assistant professor on December 2005.
 At present, in the field of research for organic optical electronics, research and development has been rapidly conducted on a global scale with the aim of creating new soft electronics based on the bottom-up method for developing devices through the accumulation of organic molecules in contrast to silicon devices that have been increasingly miniaturized based on the top-down method. While giving first priority to the creation of academic fields for organic optical electronics, Adachi Laboratory will also promote research and development aiming at putting organic devices to practical use. Through active promotion of joint research with private companies in Japan and overseas and the promotion of research and development with a view to practical application, the laboratory aims to create an organic device research base in the Center for Future Chemistry. Thus, the laboratory aims at developing organic optical electronic industries in the Fukuoka area. The laboratory has also another major mission to foster internationally-minded researchers for organic optical semiconductor devices. Due to practical application of organic LED, the field of research on organic optical electronics has greatly developed. However, numerous unclear points remain in the operation@mechanism of organic optical devices. Therefore, in order to realize large-scale development of organic optical semiconductor devices, it is an urgent task to establish organic optical semiconductor device physics by using the possible clarification of operation mechanisms of organic LED that has been put to practical use as the breakthrough.
 This division aims at creating new photonics devices by clarifying the charge-injection process in organic heterointerfaces, the charge transport and reassociation process in organic solid thin films, and elementary steps for the exciton formation and deactivation process and by controlling the exciton process in high excitation density. Moreover, as next-generation organic photonics devices, the division will also make efforts to create high-performance and high value-added organic transistors, organic solar cells, organic memory, and organic laser diodes. And through the accumulation of these individual devices, the division aims at opening a new frontier in semiconductor fields that conventional silicon technology has failed to realize, such as the realization of totally organic electronic circuits and flexible electronic devices.
 The division also has another major research goal to explore the field of new bio photonics through the combination of biomolecules and photoelectric technology based on research on organic devices.
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Center for Future Chemistry, Kyushu University