Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium

Vladimir Svrcek; Davide Mariotti; Koiji Matsubara; Michio Kondo

doi:10.1109/PVSC.2012.6317577

Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium

Vladimir Svrcek, Davide Mariotti, Koiji Matsubara, Michio Kondo

Design, Manufacturing And Engineering Management

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

1 Citation (Scopus)

Abstract

Carriers multiplication in silicon nanocrystals (Si-ncs) in a one promising eefect to considerably enhance conversion efficiency of solar cells that can overcome theoretical limits. A close proximity of Si-ncs is an essential factor for carrier multiplication due to the separated quantum cutting effect. In this study we present results on investigation of 3-dimensional (3D) surface engineering of Si-ncs directly in water. Thus at the same time allow close proximity Si-ncs without of using any surfactant. The approach is based on ns laser treatment of Si-ncs dispersed in liquid solution. We explore the excitation wavelength dependence of photoluminescence quantum yield (ratio of the number of emitted and absorbed photons) for Si-ncs as prepared and surface engineered by ns laser processing. Our results suggest that close proximity of Si-ncs in spherical particles induced by laser processing might enhance also carriers multiplication.

Original language	English
Title of host publication	2012 38th IEEE Photovoltaic Specialists Conference
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	101-104
Number of pages	4
ISBN (Electronic)	9781467300667
ISBN (Print)	9781467300643
DOIs	https://doi.org/10.1109/PVSC.2012.6317577
Publication status	Published - 4 Oct 2012
Event	2012 38th IEEE Photovoltaic Specialists Conference - Austin, TX, USA Duration: 3 Jun 2012 → 8 Jun 2012

Conference

Conference	2012 38th IEEE Photovoltaic Specialists Conference
Period	3/06/12 → 8/06/12

Keywords

silicon
nanocrystals
surface emitting lasers
laser excitation
surface engineering
surface treatment
photonics

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10.1109/PVSC.2012.6317577

Cite this

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title = "Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium",

abstract = "Carriers multiplication in silicon nanocrystals (Si-ncs) in a one promising eefect to considerably enhance conversion efficiency of solar cells that can overcome theoretical limits. A close proximity of Si-ncs is an essential factor for carrier multiplication due to the separated quantum cutting effect. In this study we present results on investigation of 3-dimensional (3D) surface engineering of Si-ncs directly in water. Thus at the same time allow close proximity Si-ncs without of using any surfactant. The approach is based on ns laser treatment of Si-ncs dispersed in liquid solution. We explore the excitation wavelength dependence of photoluminescence quantum yield (ratio of the number of emitted and absorbed photons) for Si-ncs as prepared and surface engineered by ns laser processing. Our results suggest that close proximity of Si-ncs in spherical particles induced by laser processing might enhance also carriers multiplication.",

keywords = "silicon, nanocrystals, surface emitting lasers, laser excitation, surface engineering, surface treatment, photonics",

author = "Vladimir Svrcek and Davide Mariotti and Koiji Matsubara and Michio Kondo",

year = "2012",

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doi = "10.1109/PVSC.2012.6317577",

language = "English",

isbn = "9781467300643",

pages = "101--104",

booktitle = "2012 38th IEEE Photovoltaic Specialists Conference",

publisher = "IEEE",

note = "2012 38th IEEE Photovoltaic Specialists Conference ; Conference date: 03-06-2012 Through 08-06-2012",

}

Svrcek, V, Mariotti, D, Matsubara, K & Kondo, M 2012, Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium. in 2012 38th IEEE Photovoltaic Specialists Conference., 6317577, IEEE, Piscataway, NJ, pp. 101-104, 2012 38th IEEE Photovoltaic Specialists Conference, 3/06/12. https://doi.org/10.1109/PVSC.2012.6317577

Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium. / Svrcek, Vladimir; Mariotti, Davide; Matsubara, Koiji et al.
2012 38th IEEE Photovoltaic Specialists Conference. Piscataway, NJ: IEEE, 2012. p. 101-104 6317577.

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

TY - GEN

T1 - Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium

AU - Svrcek, Vladimir

AU - Mariotti, Davide

AU - Matsubara, Koiji

AU - Kondo, Michio

PY - 2012/10/4

Y1 - 2012/10/4

N2 - Carriers multiplication in silicon nanocrystals (Si-ncs) in a one promising eefect to considerably enhance conversion efficiency of solar cells that can overcome theoretical limits. A close proximity of Si-ncs is an essential factor for carrier multiplication due to the separated quantum cutting effect. In this study we present results on investigation of 3-dimensional (3D) surface engineering of Si-ncs directly in water. Thus at the same time allow close proximity Si-ncs without of using any surfactant. The approach is based on ns laser treatment of Si-ncs dispersed in liquid solution. We explore the excitation wavelength dependence of photoluminescence quantum yield (ratio of the number of emitted and absorbed photons) for Si-ncs as prepared and surface engineered by ns laser processing. Our results suggest that close proximity of Si-ncs in spherical particles induced by laser processing might enhance also carriers multiplication.

AB - Carriers multiplication in silicon nanocrystals (Si-ncs) in a one promising eefect to considerably enhance conversion efficiency of solar cells that can overcome theoretical limits. A close proximity of Si-ncs is an essential factor for carrier multiplication due to the separated quantum cutting effect. In this study we present results on investigation of 3-dimensional (3D) surface engineering of Si-ncs directly in water. Thus at the same time allow close proximity Si-ncs without of using any surfactant. The approach is based on ns laser treatment of Si-ncs dispersed in liquid solution. We explore the excitation wavelength dependence of photoluminescence quantum yield (ratio of the number of emitted and absorbed photons) for Si-ncs as prepared and surface engineered by ns laser processing. Our results suggest that close proximity of Si-ncs in spherical particles induced by laser processing might enhance also carriers multiplication.

KW - silicon

KW - nanocrystals

KW - surface emitting lasers

KW - laser excitation

KW - surface engineering

KW - surface treatment

KW - photonics

U2 - 10.1109/PVSC.2012.6317577

DO - 10.1109/PVSC.2012.6317577

M3 - Conference contribution book

SN - 9781467300643

SP - 101

EP - 104

BT - 2012 38th IEEE Photovoltaic Specialists Conference

PB - IEEE

CY - Piscataway, NJ

T2 - 2012 38th IEEE Photovoltaic Specialists Conference

Y2 - 3 June 2012 through 8 June 2012

ER -

Carriers multiplication in neighboring surfactant-free silicon nanocrystals produced by 3D-surface engineering in liquid medium

Abstract

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Keywords

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