The University of Osaka · Materials Science
Professor Akihiko Fujii's research lab specializes in organic and polymer-based optoelectronic materials, with a focus on electroluminescent (EL) devices using novel semiconducting polymers such as poly(methylphenylsilane), polysilanes, and metal-free phthalocyanine. The lab investigates the optical and electrical properties of these materials, particularly their electroluminescent behavior across the ultraviolet to visible spectrum, aiming to develop efficient, solution-processable light-emitting devices. A key achievement includes the first demonstration of ultraviolet emission at 353 nm from a PMPS-based EL diode, highlighting the lab’s pioneering work in high-energy emission materials. The research also explores structure-property relationships to optimize device performance through molecular design and thin-film fabrication techniques.
Figures are computed from collected data and may differ slightly.
Electroluminescent (EL) diode utilizing poly(methylphenylsilane) (PMPS) has been fabricated and its optical and electroluminescent characteristics have been investigated. We have succeeded in demonstrating ultraviolet emission at 353 nm from the PMPS EL diode for the first time.
An electroluminescent (EL) diode utilizing metal-free phthalocyanine ( H 2 Pc) has been fabricated by the vacuum evaporation method. The optical characteristics of the EL diode, such as the spectra of absorption, photocurrent and electroluminescence, have been investigated, and their temperature dependence has been discussed. We have found, for the first time, that the EL spectrum has two discrete peaks at around 480 nm and above 800 nm.
Electroluminescent (EL) diodes utilizing polysilanes have been fabricated, and their optical and electroluminescent characteristics have been investigated. We have succeeded in demonstrating electroluminescence from the ultraviolet region to the visible region using the EL diodes with thin polysilane films. The diode characteristics are discussed taking the polymer structure into consideration.
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