High efficiency quantum dot solar cells using 2-dimensional 6.4-nm-diameter Si nanodisk with SiC interlayer

Makoto Igarashi, Mohd Fairuz Budiman, Wugen Pan, Yusuke Hoshi, Weiguo Hu, Mohd Erman Syazwan, Kentarou Sawano, Noritaka Usami, Seiji Samukawa

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

Abstract

Silicon (Si) quantum dot (QD) materials have been proposed for all-Silicon tandem solar cells. In this study, for the first time, high efficiency solar cells consisting of a sub-10-nm highly ordered and dense 2-dimensional (2D) array (one layer) of Si nanodisks (Si-ND) with a silicon carbide (SiC) interlayer have been fabricated. These Si-NDs were fabricated with an original top-down process involving a 2D-array bio-template etching mask made of Listeria-Dps (Li-Dps) with a 4.5-nm-diameter iron oxide core and damage-free neutral beam etching (Si-ND diameter: 6.4 nm). The Si-ND 2D array with a SiC interlayer had an extremely high optical absorption coefficient and high carrier transport due to the formation of a wide mini-band between the Si-NDs through the SiC interlayer. As a result, an open-circuit voltage of 0.556 V, short-circuit current of 31.3 mA/cm2, fill factor of 72%, and conversion efficiency of 12.6% were accomplished just by inserting one-layer Si-NDs in solar cells.

Original languageEnglish
Title of host publicationProgram - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Pages3195-3199
Number of pages5
DOIs
Publication statusPublished - 2012 Nov 26
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: 2012 Jun 32012 Jun 8

Publication series

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

Other

Other38th IEEE Photovoltaic Specialists Conference, PVSC 2012
CountryUnited States
CityAustin, TX
Period12/6/312/6/8

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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  • Cite this

    Igarashi, M., Budiman, M. F., Pan, W., Hoshi, Y., Hu, W., Syazwan, M. E., Sawano, K., Usami, N., & Samukawa, S. (2012). High efficiency quantum dot solar cells using 2-dimensional 6.4-nm-diameter Si nanodisk with SiC interlayer. In Program - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012 (pp. 3195-3199). [6318257] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2012.6318257