Ahmmad Arima

Ahmmad Arima Address
4-3-16 Jonan, Yonezawa, Bld.-10, Room-204.
TEL +81(0)238 26 3309
E-mail arima[--at--]yz.yamagata-u.ac.jp
Post Oct, 01, 2012-
Research Field Materials engineering, Photochemistry, Electrochemisty, Surface science
Key Words
Nanomaterials, quantum dot, semiconductor, solar cells, hydrogen, water splitting.
Research Interests

Solar energy is a vast and inexhaustible resource from the sun that can be converted into electrical (solar cell), chemical (hydrogen) or heat energy. Our group works for the efficient conversion of this infinite source of energy using nanomaterials or nanocomposites. We synthesize and control the size and shapes of nanomaterials of various metal oxides, sulfides or phosphides and apply them to inorganic-organic heterojunction solar cells or use them for hydrogen production via photocatalytic water splitting. Other than the above fields, we are also interested in biodegradable polymer nanocomposites.


The distinct properties of nanoparticles enable their unique applications in various fields such as catalysis, electronics, optics, energy, mechanical engineering and biomedical applications. Based on the unique optical properties of semiconductor nanoparticles, the efficiency of inorganic (quantum dot) solar cell is theoretically measured to be 60%, which is three times larger than conventional Si based solar cell. Moreover, solar hydrogen via photocatalytic water splitting has attracted tremendous attention because of its great potential for low-cost and clean energy. With these rationales, we are working on the synthesis of highly active nano-photocatalytic system that can efficiently convert solar energy into electrical or chemical energy. Collaborating with other local and international research groups, we are also applying the newly synthesized nanomaterials to different other fields too. Nanotechnology is a highly multidisciplinary field of applied science and one should be interested in the nanotechnology for one very important reason-it’s going to change our life.