Matsumura Laboratory
Research Center for Solar Energy Chemistry
Osaka University

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Members / Research Projects / List of Publications / Links
Members
Faculties
Prof. Dr.　 　 　 　 　 MATSUMURA Michio　　　　(e-mail)
Assoc. Prof. Dr. 　 　IKEDA Shigeru 　　　　　　　(e-mail)
Technical Staff　 　 HARADA Takashi　　　　　　(e-mail)
Office Staff 　　 　　YANO Fumiko 　　　　　　　　(e-mail)
Res. Assoc. 　　　 　 KIMURA Akira　　　　　　　　(e-mail)
Res. Assoc. Dr.　 　 HIRAI Takeshi　　　　　　　　(e-mail)
Graduate Students
D3　　　　　　 　OSASA Takahiro
D3　　　　　　 　TSUZINO Kazuya
 D1　　　　　　 　NG Yun Hau
 D1　　　　　　 　LEE Chia Lung
M2　　　　　　 　ASAHI Miho
M2　　　　　　 　TACHI Koji
M2　　　　　　 　YAMAMOTO Shuhei
M1　　　　　　 　IKOMA Yoshimitsu
M1　　　　　　 　OKAMOTO Natsumi
M1　　　　　　 　SASAKI Sho
M1　　　　　　 　TSURU Shinsuke
 M1　　　　　　 　PARK Sang-In
　　　　 　
Undergraduate Students
B4　　　　　　 　OKAMURA Hidekazu
B4　　　　　　 　KATO Daiki
B4　　　　　　 　KOBAYASHI Hideyuki
B4　　　　　　 　HAYAMI Hiroshi
B4　　　　　　 　MARUYAMA Yosuke
 B4　　　　　　 　MORITA Yoshihiro
Research Projects
Multicrystalline-Silicon Solar Cell
Lowering the surface reflectivity of multicrystalline(mc)-Si wafers is the key to increasing the efficiency of mc-Si solar cells. For this purpose, we have been studying the method for texturing the mc-Si surface by means of metal-catalyzed chemical etching.
Boring Deep Cylindrical Nanoholes in Silicon by Using Silver Particles asa Catalyst
Cylindrical nanoholes were generated in Si(100) by immersing the wafer ina solution containing HF and H2O2 after loading Ag nanoparticles. They reached 0.5 nm in depth. At the bottom of the hole an Agparticle was observed. This result suggests that the Ag particlebehaves like a borer and that the position of the holes can be controlledby the deposition position of the Ag particles. Thesenanoholes are expected to be useful for making new electronic and opticaldevices.
Organic Electroluminescence Devices
Organic light-emitting diodes (OLED) are possible candidates for future display and interior illumination materials. Although their efficiency is controlled by the carrier injection of charges, carrier transport, photoluminescence processes, the details of these processes are not fully understood. Therefore, we are studying the processes, so that the really applicable efficient devices will be achieved.
Organic Thin Film Solar Cell
Organic thin film solar cells have attracted much attention because of their inherent advantages, e.g., low costs of the materials, simple fabricating processes, light and flexible structures. However, because their energy conversion efficiency is very low, there have been no examples of their practical applications. We have been studying the organic thin film solar cells composed of polymers, pigments, and various organic complexes to achieve high efficiency.
Photocatalytic Overall Water Splitting
Photocatalytic water splitting into hydrogen (H2) and oxygen (O2) is an ideal system for photon-chemical energy conversion. Although many photocatalytic materials have been developed, they can hardly absorb visible light. However, in order to establish systems for utilizing solar energy, the development of efficient photocatalysts operational under visible light is imperative. Hence, we are synthesizing novel photocatalysts which absorb visible light and are capable of splitting water.
Titanium Oxide Photocatalysis
Titanium oxide (TiO2) is one of the most promising photocatalytic materials because of its sufficient photostability, nontoxicity for environments, and ability to induce various kinds of redox reactions. Its photocatalytic activity strongly depends on the bulk and surface physicochemical properties of the TiO2 particles, and development of efficient TiO2-photocatalytic systems by controlling these properties is one of the most attractive targets of fundamental studies in this field. Our research interest has been focused on development of novel chemical methods for the regulation of surface and bulk structure of TiO2 particles in order to enhance the photocatalytic activities.
Preparation of nano-structured materials
Solids having nanosized structures are of scientific and technological interest because they are expected to exhibit various functions unique to the structures. We are investigating new preparation methods for producing periodic surface and bulk structures in nanometer size region using semiconductor, oxides and polymers, especially, with a view of producing new class of catalytic materials.
List of Publications
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Links
Osaka University

Graduate School of / School of Engineering Science, Osaka University

1-3 Machikaneyama, Toyonaka 560-8531, Osaka, Japan (TEL/FAX: +81-6-6850-6699)