Shin Kawami
Pioneer Corporation
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Publication
Featured researches published by Shin Kawami.
Applied Physics Letters | 1994
Yasuhiko Shirota; Yoshiyuki Kuwabara; Hiroshi Inada; Takeo Wakimoto; Hitoshi Nakada; Yoshinobu Yonemoto; Shin Kawami; Kunio Imai
A novel π‐conjugated starburst molecule, 4,4’,4‘‐tris(3‐methylphenylphenylamino)triphenylamine (m‐MTDATA), which forms a stable amorphous glass, functions as an excellent hole transport material for organic electroluminescent devices. An electroluminescent device consisting of double hole transport layers of m‐MTDATA and 4,4’‐bis(3‐methylphenylphenylamino)biphenyl and an emitting layer of tris(8‐quinolinolato)aluminum exhibits a high luminance efficiency and significant durability.
Journal of Luminescence | 1997
Yasuhiko Shirota; Yoshiyuki Kuwabara; Daisuke Okuda; Ryoji Okuda; Hiromitsu Ogawa; Hiroshi Inada; Takeo Wakimoto; Hiroshi Nakada; Yoshinobu Yonemoto; Shin Kawami; Kunio Imai
Abstract Novel families of starburst molecules based on π-electron systems, which readily form morphologically and thermally stable, uniform amorphous films by vacuum deposition, have been found to function as excellent materials for organic electroluminescent (EL) devices. The multilayer organic EL devices consisting of double hole-transport layers and an emitting layer have been shown to exhibit high performances.
SID Symposium Digest of Technical Papers | 2004
Taishi Tsuji; Shin Kawami; Satoshi Miyaguchi; Tsuyoshi Naijo; Toshinao Yuki; Shinji Matsuo; Hiroshi Miyazaki
We have developed high-efficiency, long-lived organic light-emitting diode (OLED) devices by introducing red phosphorescent dopants into bis(8-quinolinolato)phenolato-aluminum(III) complexes. The devices exhibited luminance efficiency of 12 cd/A at CIE color coordinates (0.65, 034). The luminance half-decay lifetime is expected to be over 30,000 hours at an initial luminance of 700 cd/m2. We have successfully incorporated these devices into commercial OLED displays.
Journal of The Society for Information Display | 2005
Taishi Tsuji; Shin Kawami; Satoshi Miyaguchi; Tsuyoshi Naijo; Toshinao Yuki; Shinji Matsuo; Hiroshi Miyazaki
— We have used bis(8-quinolinolato)phenolato-aluminum complexes as emission-layer hosts in red-phosphorescent OLED devices. This enabled high-efficiency long-lived OLED devices with a simple device structure that does not require a hole-blocking layer. Devices with a red-phosphorescent dopant introduced into a noble bis(8-quinolinolato)phenolato-aluminum complex exhibited a high efficiency of 12 cd/A at CIE color coordinates (0.65, 035) and a long operating lifetime of 30,000 hours or more at an initial luminance of 700 cd/m2. Moreover, triplet-triplet annihilation was reduced in the devices because of the wide emission zone enabled by the complex and the short phosphorescent lifetime of the red-phosphorescent dopant. We have successfully incorporated these red-phosphorescent devices into commercial OLED displays.
Synthetic Metals | 2001
Teruichi Watanabe; Kenji Nakamura; Shin Kawami; Yoshinori Fukuda; Taishi Tsuji; Takeo Wakimoto; Satoshi Miyaguchi; Masayuki Yahiro; Moon-Jae Yang; Tetsuo Tsutsui
Proceedings of SPIE, the International Society for Optical Engineering | 2001
Teruichi Watanabe; Kenji Nakamura; Shin Kawami; Yoshinori Fukuda; Taishi Tsuji; Takeo Wakimoto; Satoshi Miyaguchi
Archive | 1997
Shin Kawami; Hiroshi Abiko; Takashi Ujihara
Current Applied Physics | 2005
Taiju Tsuboi; Masayuki Tanigawa; Shin Kawami; Taishi Tsuji
Current Applied Physics | 2005
Taiju Tsuboi; Masayuki Tanigawa; Shin Kawami; Taishi Tsuji
Archive | 1996
Shin Kawami; Hitoshi Nakada; Takemi Naito