Realistic quantum design of silicon quantum dot intermediate band solar cells.

TitleRealistic quantum design of silicon quantum dot intermediate band solar cells.
Publication TypeJournal Article
Year of Publication2013
AuthorsHu W, Igarashi M, Lee M-Y, Li Y, Samukawa S
JournalNanotechnology
Volume24
Issue26
Pagination265401
Date Published2013 Jul 5
Abstract

A highly periodical Si nanodisk superlattice has been fabricated by our top-down process. Based on the realistic structure, a 3D simulation program using the finite element method is developed to calculate energy band structure, optical and electrical properties, as well as the intermediate band solar cell operation. Both the experiments and simulations reveal that miniband formation enhances the optical and electrical collections. Consequently, detailed electronic structure and conversion efficiency are examined to guide the optimal design of minibands. A theoretically predicted maximal efficiency of the explored Si nanodisk superlattice is 50.3%, which is promising, compared with well-known complicated Si tandem solar cells.

DOI10.1155/2013/206525
Alternate JournalNanotechnology