Energy Conversion Division -Tsuyoshi YOSHITAKE-
Photoelectric Conversion Technology
- Fabrication of ultrananocrystalline diamond/hydrogenated amorphous carbon composite (UNCD/a-C:H) films by physical vapor depositions and their application to photovoltaics
- Fabrication of semiconducting iron disilicides thin films by sputtering and their application to photovoltaics
- Hetero-structural spintronics devices comprising ferromagnetic metals and semiconductors on the basis of Fe-Si system
- Application of UNCD/a-C:H films as hard coating materials
- Application of cubic AlxB1 xN thin films to the growth of single crystalline diamond films as buffer layers
The laboratory devotes itself to education and research on new ecologically friendly materials applicable to photovoltaics and advanced electrical devices. Concretely, the target materials are semiconducting ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a-C:H) composite (UNCD/a-C:H), which comprises a large number of diamond grains with diameters of less than 10 nm and an amorphous carbon matrix, and semiconducting iron disilicides. The research is mainly experimentally conducted and the experiment covers the growth in thin film by physical vapor depositions, the structural and optoelectrical evaluations of the films, and the fabrication of optoelectrical devices on the basis of the film preparation and processing such as lithography and etching. In other words, the research is consistently made from the elementary level of materials crystalline growth to the fabrication of devices such as photovoltaic cells.