Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells

Makoto Igarashi; Chi Hsien Huang; Xuan Yu Wang; Mohd Fairuz Budiman; Yosuke Tamura; Takayuki Kiba; Akihiro Murayama; Toshiyuki Kaizu; Yoshitaka Okada; Seiji Samukawa

doi:10.1109/PVSC.2011.6186706

Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells

Makoto Igarashi, Chi Hsien Huang, Xuan Yu Wang, Mohd Fairuz Budiman, Yosuke Tamura, Takayuki Kiba, Akihiro Murayama, Toshiyuki Kaizu, Yoshitaka Okada, Seiji Samukawa

Innovative Energy Research Center

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

1 Citation (Scopus)

Abstract

We fabricated a highly ordered and dense 2-dimensional array of Si nanodisks (NDs) with our new processes using a bio-template and damage-free neutral beam. Direct-bandgap-like photon emissions were observed from the Si-NDs due to quantum confinement by using time resolved PL measurements. The PL time-profiles were identified in three components (nanosecond region or less) originated in lateral coupling of wave-function i.e. miniband state and localized state in silicon nanodisks. Furthermore, The I-V characteristics of the 2D array of Si-NDs using conductive atomic force microscopy (AFM) indicated that the electronic states of the neighboring NDs were coupled and formed minibands in the 2D array. We also fabricated Si-NDs with an inter-layer of SiC, and found that the SiC matrix could yield a high absorption coefficient without any shift in the bandgap energy (Eg) of the Si-ND structure.

Original language	English
Title of host publication	Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011
Pages	3511-3515
Number of pages	5
DOIs	https://doi.org/10.1109/PVSC.2011.6186706
Publication status	Published - 2011 Dec 1
Event	37th IEEE Photovoltaic Specialists Conference, PVSC 2011 - Seattle, WA, United States Duration: 2011 Jun 19 → 2011 Jun 24

Publication series

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

Other

Other	37th IEEE Photovoltaic Specialists Conference, PVSC 2011
Country/Territory	United States
City	Seattle, WA
Period	11/6/19 → 11/6/24

ASJC Scopus subject areas

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

Access to Document

10.1109/PVSC.2011.6186706

Cite this

Igarashi, M., Huang, C. H., Wang, X. Y., Budiman, M. F., Tamura, Y., Kiba, T., Murayama, A., Kaizu, T., Okada, Y., & Samukawa, S. (2011). Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells. In Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011 (pp. 3511-3515). [6186706] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2011.6186706

Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells. / Igarashi, Makoto; Huang, Chi Hsien; Wang, Xuan Yu et al.
Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011. 2011. p. 3511-3515 6186706 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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

Igarashi, M, Huang, CH, Wang, XY, Budiman, MF, Tamura, Y, Kiba, T, Murayama, A, Kaizu, T, Okada, Y & Samukawa, S 2011, Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells. in Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011., 6186706, Conference Record of the IEEE Photovoltaic Specialists Conference, pp. 3511-3515, 37th IEEE Photovoltaic Specialists Conference, PVSC 2011, Seattle, WA, United States, 11/6/19. https://doi.org/10.1109/PVSC.2011.6186706

Igarashi M, Huang CH, Wang XY, Budiman MF, Tamura Y, Kiba T et al. Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells. In Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011. 2011. p. 3511-3515. 6186706. (Conference Record of the IEEE Photovoltaic Specialists Conference). doi: 10.1109/PVSC.2011.6186706

Igarashi, Makoto ; Huang, Chi Hsien ; Wang, Xuan Yu et al. / Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells. Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011. 2011. pp. 3511-3515 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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AU - Budiman, Mohd Fairuz

AU - Tamura, Yosuke

AU - Kiba, Takayuki

AU - Murayama, Akihiro

AU - Kaizu, Toshiyuki

AU - Okada, Yoshitaka

AU - Samukawa, Seiji

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Optical absorption, photo-luminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells

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