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

doi:10.1109/PVSC.2013.6744972

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

Innovative Energy Research Center

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2456-2458
Number of pages	3
ISBN (Print)	9781479932993
DOIs	https://doi.org/10.1109/PVSC.2013.6744972
Publication status	Published - 2013
Event	39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States Duration: 2013 Jun 16 → 2013 Jun 21

Publication series

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

Other

Other	39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Country	United States
City	Tampa, FL
Period	13/6/16 → 13/6/21

Keywords

Mini band
Quantum dot
Silicon
Super lattice

ASJC Scopus subject areas

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

Access to Document

10.1109/PVSC.2013.6744972

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Rahman, M. M., Igarashi, M., Hu, W., Syazwan, M. E., Hoshi, Y., Usami, N., & Samukawa, S. (2013). 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. In 39th IEEE Photovoltaic Specialists Conference, PVSC 2013 (pp. 2456-2458). [6744972] (Conference Record of the IEEE Photovoltaic Specialists Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2013.6744972

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

39th IEEE Photovoltaic Specialists Conference, PVSC 2013. Institute of Electrical and Electronics Engineers Inc., 2013. p. 2456-2458 6744972 (Conference Record of the IEEE Photovoltaic Specialists Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Rahman, MM, Igarashi, M, Hu, W, Syazwan, ME, Hoshi, Y, Usami, N & Samukawa, S 2013, 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. in 39th IEEE Photovoltaic Specialists Conference, PVSC 2013., 6744972, Conference Record of the IEEE Photovoltaic Specialists Conference, Institute of Electrical and Electronics Engineers Inc., pp. 2456-2458, 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, Tampa, FL, United States, 13/6/16. https://doi.org/10.1109/PVSC.2013.6744972

Rahman MM, Igarashi M, Hu W, Syazwan ME, Hoshi Y, Usami N et al. 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. In 39th IEEE Photovoltaic Specialists Conference, PVSC 2013. Institute of Electrical and Electronics Engineers Inc. 2013. p. 2456-2458. 6744972. (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2013.6744972

Rahman, Mohammad Maksudur ; Igarashi, Makoto ; Hu, Weiguo ; Syazwan, Mohd Erman ; Hoshi, Yusuke ; Usami, Noritaka ; Samukawa, Seiji. / 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. 39th IEEE Photovoltaic Specialists Conference, PVSC 2013. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 2456-2458 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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AU - Rahman, Mohammad Maksudur

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AU - Syazwan, Mohd Erman

AU - Hoshi, Yusuke

AU - Usami, Noritaka

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AB - 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%).

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