50% Efficiency intermediate band solar cell design using highly periodical silicon nanodisk array

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

A high-quality Si nanodisk superlattice is fabricated by our top-down process. For the first time, a 3D finite element method (FEM) is developed to calculate energy band structure, optical and electrical properties, as well as the intermediate band solar cell (IBSC) operation for the realistic structure. 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 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
Title of host publication2012 IEEE International Electron Devices Meeting, IEDM 2012
DOIs
StatePublished - 1 Dec 2012
Event2012 IEEE International Electron Devices Meeting, IEDM 2012 - San Francisco, CA, United States
Duration: 10 Dec 201213 Dec 2012

Publication series

NameTechnical Digest - International Electron Devices Meeting, IEDM
ISSN (Print)0163-1918

Conference

Conference2012 IEEE International Electron Devices Meeting, IEDM 2012
CountryUnited States
CitySan Francisco, CA
Period10/12/1213/12/12

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