Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition

Yeongho Kim; Nikolai Faleev; Dinghao Tang; David Smith; Darius Kuciauskas; Patricia C. Dippo; Christiana Honsberg

doi:10.1109/PVSC.2014.6925095

Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition

Yeongho Kim, Nikolai Faleev, Dinghao Tang, David Smith, Darius Kuciauskas, Patricia C. Dippo, Christiana Honsberg

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

Abstract

The impact of the Sb composition on the structural and optical properties of ten-stack InAs/GaAsSb quantum dots (QDs) were investigated using transmission electron microscopy (TEM), high-resolution x-ray diffraction (XRD), and photoluminescence (PL). The TEM images demonstrate that the Sb composition affects the change in the QD density and morphology. From analysis of XRD reciprocal space maps (RSMs) of the (224) asymmetrical reflection, it is found that as the Sb composition increases the relaxation of the initial elastic stress of the GaAsSb increases up to 23 %. In addition, the Sb composition influences the interband optical transitions such as the PL peak redshift and carrier lifetimes.

Original language	English (US)
Title of host publication	2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1056-1058
Number of pages	3
ISBN (Electronic)	9781479943982
DOIs	https://doi.org/10.1109/PVSC.2014.6925095
State	Published - Oct 15 2014
Event	40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States Duration: Jun 8 2014 → Jun 13 2014

Publication series

Name	2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

Other

Other	40th IEEE Photovoltaic Specialist Conference, PVSC 2014
Country/Territory	United States
City	Denver
Period	6/8/14 → 6/13/14

Keywords

carrier lifetime
crystalline defects
intermediate band solar cells
photoluminescence
quantum dots

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/PVSC.2014.6925095

Cite this

Kim, Y., Faleev, N., Tang, D., Smith, D., Kuciauskas, D., Dippo, P. C., & Honsberg, C. (2014). Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 (pp. 1056-1058). Article 6925095 (2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2014.6925095

Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition. / Kim, Yeongho; Faleev, Nikolai; Tang, Dinghao et al.
2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 1056-1058 6925095 (2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014).

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

Kim, Y, Faleev, N, Tang, D, Smith, D, Kuciauskas, D, Dippo, PC & Honsberg, C 2014, Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition. in 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014., 6925095, 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014, Institute of Electrical and Electronics Engineers Inc., pp. 1056-1058, 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, Denver, United States, 6/8/14. https://doi.org/10.1109/PVSC.2014.6925095

Kim Y, Faleev N, Tang D, Smith D, Kuciauskas D, Dippo PC et al. Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 1056-1058. 6925095. (2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014). doi: 10.1109/PVSC.2014.6925095

@inproceedings{8c1ccd118a9e4875ad39656bf878e51a,

title = "Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition",

abstract = "The impact of the Sb composition on the structural and optical properties of ten-stack InAs/GaAsSb quantum dots (QDs) were investigated using transmission electron microscopy (TEM), high-resolution x-ray diffraction (XRD), and photoluminescence (PL). The TEM images demonstrate that the Sb composition affects the change in the QD density and morphology. From analysis of XRD reciprocal space maps (RSMs) of the (224) asymmetrical reflection, it is found that as the Sb composition increases the relaxation of the initial elastic stress of the GaAsSb increases up to 23 %. In addition, the Sb composition influences the interband optical transitions such as the PL peak redshift and carrier lifetimes.",

keywords = "carrier lifetime, crystalline defects, intermediate band solar cells, photoluminescence, quantum dots",

author = "Yeongho Kim and Nikolai Faleev and Dinghao Tang and David Smith and Darius Kuciauskas and Dippo, {Patricia C.} and Christiana Honsberg",

note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; 40th IEEE Photovoltaic Specialist Conference, PVSC 2014 ; Conference date: 08-06-2014 Through 13-06-2014",

year = "2014",

month = oct,

day = "15",

doi = "10.1109/PVSC.2014.6925095",

language = "English (US)",

series = "2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "1056--1058",

booktitle = "2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014",

}

TY - GEN

T1 - Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition

AU - Kim, Yeongho

AU - Faleev, Nikolai

AU - Tang, Dinghao

AU - Smith, David

AU - Kuciauskas, Darius

AU - Dippo, Patricia C.

AU - Honsberg, Christiana

PY - 2014/10/15

Y1 - 2014/10/15

N2 - The impact of the Sb composition on the structural and optical properties of ten-stack InAs/GaAsSb quantum dots (QDs) were investigated using transmission electron microscopy (TEM), high-resolution x-ray diffraction (XRD), and photoluminescence (PL). The TEM images demonstrate that the Sb composition affects the change in the QD density and morphology. From analysis of XRD reciprocal space maps (RSMs) of the (224) asymmetrical reflection, it is found that as the Sb composition increases the relaxation of the initial elastic stress of the GaAsSb increases up to 23 %. In addition, the Sb composition influences the interband optical transitions such as the PL peak redshift and carrier lifetimes.

AB - The impact of the Sb composition on the structural and optical properties of ten-stack InAs/GaAsSb quantum dots (QDs) were investigated using transmission electron microscopy (TEM), high-resolution x-ray diffraction (XRD), and photoluminescence (PL). The TEM images demonstrate that the Sb composition affects the change in the QD density and morphology. From analysis of XRD reciprocal space maps (RSMs) of the (224) asymmetrical reflection, it is found that as the Sb composition increases the relaxation of the initial elastic stress of the GaAsSb increases up to 23 %. In addition, the Sb composition influences the interband optical transitions such as the PL peak redshift and carrier lifetimes.

KW - carrier lifetime

KW - crystalline defects

KW - intermediate band solar cells

KW - photoluminescence

KW - quantum dots

UR - http://www.scopus.com/inward/record.url?scp=84912070753&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84912070753&partnerID=8YFLogxK

U2 - 10.1109/PVSC.2014.6925095

DO - 10.1109/PVSC.2014.6925095

M3 - Conference contribution

AN - SCOPUS:84912070753

T3 - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

SP - 1056

EP - 1058

BT - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 40th IEEE Photovoltaic Specialist Conference, PVSC 2014

Y2 - 8 June 2014 through 13 June 2014

ER -

Structural and optical properties of multi-stack InAs/GaAsSb quantum dots with different Sb composition

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this