Realistic quantum design of silicon quantum dot intermediate band solar cells

Weiguo Hu*, Makoto Igarashi, Ming Yi Lee, Yiming Li, Seiji Samukawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

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.

Original languageEnglish
Article number265401
JournalNanotechnology
Volume24
Issue number26
DOIs
StatePublished - 5 Jul 2013

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