Numerical approach to the investigation of performance of silicon nanowire solar cells embedded in a SiO2 matrix

Yasuyoshi Kurokawa, Shinya Kato, Yuya Watanabe, Akira Yamada, Makoto Konagai, Yoshimi Ohta, Yusuke Niwa, Masaki Hirota

Research output: Contribution to journalArticle

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Abstract

The electrical characteristics of silicon nanowire (SiNW) solar cells with p-type hydrogenated amorphous silicon oxide (Eg = 1:9 eV)/n-type SiNWs embedded in a SiO2/n-type hydrogenated amorphous silicon oxide (Eg = 1:9 eV) structure have been investigated using two- and threedimensional device simulators, taking into account the quantum size effect. The average bandgap of a SiNW embedded in SiO2 increased from 1.15 to 2.68 eV with decreasing diameter from 10 to 2 nm, owing to the quantum size effect. Note that under sunlight of AM1.5G, the open-circuit voltage (V oc) of SiNW solar cells also increased to 1.46 V with decreasing diameter of the SiNWs to 2 nm. This result suggests that it is possible to enhance Voc by applying the quantum size effect, and a SiNW is a promising material for all-silicon tandem solar cells.

Original languageEnglish
Article number11PE12
JournalJapanese journal of applied physics
Volume51
Issue number11 PART2
DOIs
Publication statusPublished - Nov 1 2012

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Nanowires
Solar cells
nanowires
solar cells
Silicon
silicon
matrices
Silicon oxides
Amorphous silicon
silicon oxides
amorphous silicon
Open circuit voltage
sunlight
open circuit voltage
simulators
Energy gap
Simulators

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Numerical approach to the investigation of performance of silicon nanowire solar cells embedded in a SiO2 matrix. / Kurokawa, Yasuyoshi; Kato, Shinya; Watanabe, Yuya; Yamada, Akira; Konagai, Makoto; Ohta, Yoshimi; Niwa, Yusuke; Hirota, Masaki.

In: Japanese journal of applied physics, Vol. 51, No. 11 PART2, 11PE12, 01.11.2012.

Research output: Contribution to journalArticle

Kurokawa, Yasuyoshi ; Kato, Shinya ; Watanabe, Yuya ; Yamada, Akira ; Konagai, Makoto ; Ohta, Yoshimi ; Niwa, Yusuke ; Hirota, Masaki. / Numerical approach to the investigation of performance of silicon nanowire solar cells embedded in a SiO2 matrix. In: Japanese journal of applied physics. 2012 ; Vol. 51, No. 11 PART2.
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