02. Dec. 2010, 16:15 Uhr, Gebäude NW1, Raum H3
Nano for energy: a new approach for photovoltaic cells with semiconductor nanostructures
Prof. Dr. Henri Mariette, CEA-CNRS - Univ. J. Fourier, Grenoble
This talk will discuss the fundamental physics challenges of the low dimensional structures for solar energy related applications. Perhaps the best known and most well developed solar cell structures are based on a homo p-n junction of an inorganic semiconductor, such as Si and III-V multi-junction solar cells.
Here I will try to share and to illustrate other ideas we have in our group to tackle these issues:
(i) the use of direct bandgap semiconductors, mainly based on II-VI materials.
(ii) the systematic study (structural and optical one) of type II bandgap alignment at the interfaces of heterostructures (such alignment corresponds to a spontaneous dissociation of electrons and holes at the opposite sides of the interface).
(iii) the development of one dimensional architecture by using an array of core/shell nanowires.