OKADA Yoshitaka Professor
Komaba Campus
Environment & Clean Electric Energy
Electronic materials/Electric materials
Next generation solar cell technology to achieve both high-efficiency and low-cost.
In order to realize ultra-high-efficiency and innovative low-cost solar cells, search and optimization of materials using thin-film growth technology, the electrical and optical evaluation of material and device properties including by spectroscopic characterization. We conduct multifaceted research from experimental approaches such as the development of electrical measurement tools to theoretical analysis by numerical simulation.
Research field 1
Intermediate band -type quantum dot solar cell
In solar cells in which the optimal mini band structure by quantum dot and super -lattice is introduced in the optical absorption layer, the theoretical value of energy conversion efficiency exceeds 60%at the time of lighting, and about 2-3 times that of the current single crystal SI solar cell. It will be. In the high -efficiency approach using the intermediate band, it is essential that the life of a career that has been empty in the level of the intermediate band is long enough, and that the optical encouragement from the intermediate band to the conductive band is efficient. In this laboratory, using the high -density quantum dot super -lattice production technology to study the mechanism of the optical conversion process via the middle band formed in the quantum dot super lattice and research the control method. , We aim to increase the efficiency of quantum dot solar cells.