High photo-current generation in a three-dimensional silicon quantum dot superlattice fabricated by combination of bio-template and neutral beam etching for quantum dot solar cell

Mohammad Maksudur Rahman, Makoto Igarashi, Weiguo Hu, Mohd Erman Syazwan, Yusuke Hoshi, Noritaka Usami, Seiji Samukawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

A Quantum Dot Superlattice (QDSL) offers high prospect for new generation photovoltaics. We fabricated and characterized a 3-dimensional array of Si-NDs as a QDSL with a high-aspect ratio, clear interface, and uniform size by using our advanced top-down technology consisting of bio-template and neutral beam etching processes for high-efficiency solar cells. Conductive atomic force microscopy measurements revealed that the conductivity became higher as the arrangement was changed from single Si-ND to 2D and 3D arrays with the same matrix of SiC, i.e. the coupling of wave functions was changed. Moreover, we measured the contribution of 3D Si-NDs array in producing photocurrent inside a quantum dot solar cell and also observed a higher photo absorption of sunlight by 3D Si-NDs (30%) than by a 2D array of Si-NDs (10%).

Original languageEnglish
Title of host publication39th IEEE Photovoltaic Specialists Conference, PVSC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2456-2458
Number of pages3
ISBN (Print)9781479932993
DOIs
Publication statusPublished - 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: 2013 Jun 162013 Jun 21

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period13/6/1613/6/21

Keywords

  • Mini band
  • Quantum dot
  • Silicon
  • Super lattice

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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