Improving the photoluminescence properties of self-assembled InAs surface quantum dots by incorporation of antimony

C. H. Chiang; Y. H. Wu; M. C. Hsieh; C. H. Yang; J. F. Wang; Ross C.C. Chen; Li Chang; Jenn-Fang Chen

doi:10.1016/j.apsusc.2011.04.006

Improving the photoluminescence properties of self-assembled InAs surface quantum dots by incorporation of antimony

C. H. Chiang^*, Y. H. Wu, M. C. Hsieh, C. H. Yang, J. F. Wang, Ross C.C. Chen, Li Chang, Jenn-Fang Chen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

This study investigates the effects of surfactant and segregation from InAs surface quantum dots (SQDs) by incorporating antimony (Sb) into the QD layers. The Sb surfactant effect extends planar growth and suppresses dot formation. Incorporating Sb can reduce the density of SQDs by more than two orders of magnitude. Photoluminescence (PL) reveals enhancement in the optical properties of InAs SQDs as the Sb beam equivalent pressure (BEP) increases. This improvement is caused by the segregation of Sb on the surface of SQDs, which reduces non-radiative recombination and suppresses carrier loss. The dark line at the SQDs surface in the transmission electron microscopic image suggests that the incorporated Sb probably segregates close to the surface of the SQDs. These results indicate a marked Sb segregation effect that can be exploited to improve the surface-sensitive properties of SQDs for biological sensing.

Original language	English
Pages (from-to)	8784-8787
Number of pages	4
Journal	Applied Surface Science
Volume	257
Issue number	21
DOIs	https://doi.org/10.1016/j.apsusc.2011.04.006
State	Published - 15 Aug 2011

Keywords

Antimony
InAs
Segregation
Surface quantum dot
Surfactant

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10.1016/j.apsusc.2011.04.006

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@article{4233e740a20d47dfa1e68d6a6fa01a86,

title = "Improving the photoluminescence properties of self-assembled InAs surface quantum dots by incorporation of antimony",

abstract = "This study investigates the effects of surfactant and segregation from InAs surface quantum dots (SQDs) by incorporating antimony (Sb) into the QD layers. The Sb surfactant effect extends planar growth and suppresses dot formation. Incorporating Sb can reduce the density of SQDs by more than two orders of magnitude. Photoluminescence (PL) reveals enhancement in the optical properties of InAs SQDs as the Sb beam equivalent pressure (BEP) increases. This improvement is caused by the segregation of Sb on the surface of SQDs, which reduces non-radiative recombination and suppresses carrier loss. The dark line at the SQDs surface in the transmission electron microscopic image suggests that the incorporated Sb probably segregates close to the surface of the SQDs. These results indicate a marked Sb segregation effect that can be exploited to improve the surface-sensitive properties of SQDs for biological sensing.",

keywords = "Antimony, InAs, Segregation, Surface quantum dot, Surfactant",

author = "Chiang, {C. H.} and Wu, {Y. H.} and Hsieh, {M. C.} and Yang, {C. H.} and Wang, {J. F.} and Chen, {Ross C.C.} and Li Chang and Jenn-Fang Chen",

year = "2011",

month = aug,

day = "15",

doi = "10.1016/j.apsusc.2011.04.006",

language = "English",

volume = "257",

pages = "8784--8787",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

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T1 - Improving the photoluminescence properties of self-assembled InAs surface quantum dots by incorporation of antimony

AU - Chiang, C. H.

AU - Wu, Y. H.

AU - Hsieh, M. C.

AU - Yang, C. H.

AU - Wang, J. F.

AU - Chen, Ross C.C.

AU - Chang, Li

AU - Chen, Jenn-Fang

PY - 2011/8/15

Y1 - 2011/8/15

N2 - This study investigates the effects of surfactant and segregation from InAs surface quantum dots (SQDs) by incorporating antimony (Sb) into the QD layers. The Sb surfactant effect extends planar growth and suppresses dot formation. Incorporating Sb can reduce the density of SQDs by more than two orders of magnitude. Photoluminescence (PL) reveals enhancement in the optical properties of InAs SQDs as the Sb beam equivalent pressure (BEP) increases. This improvement is caused by the segregation of Sb on the surface of SQDs, which reduces non-radiative recombination and suppresses carrier loss. The dark line at the SQDs surface in the transmission electron microscopic image suggests that the incorporated Sb probably segregates close to the surface of the SQDs. These results indicate a marked Sb segregation effect that can be exploited to improve the surface-sensitive properties of SQDs for biological sensing.

AB - This study investigates the effects of surfactant and segregation from InAs surface quantum dots (SQDs) by incorporating antimony (Sb) into the QD layers. The Sb surfactant effect extends planar growth and suppresses dot formation. Incorporating Sb can reduce the density of SQDs by more than two orders of magnitude. Photoluminescence (PL) reveals enhancement in the optical properties of InAs SQDs as the Sb beam equivalent pressure (BEP) increases. This improvement is caused by the segregation of Sb on the surface of SQDs, which reduces non-radiative recombination and suppresses carrier loss. The dark line at the SQDs surface in the transmission electron microscopic image suggests that the incorporated Sb probably segregates close to the surface of the SQDs. These results indicate a marked Sb segregation effect that can be exploited to improve the surface-sensitive properties of SQDs for biological sensing.

KW - Antimony

KW - InAs

KW - Segregation

KW - Surface quantum dot

KW - Surfactant

UR - http://www.scopus.com/inward/record.url?scp=79960157681&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2011.04.006

DO - 10.1016/j.apsusc.2011.04.006

M3 - Article

AN - SCOPUS:79960157681

SN - 0169-4332

VL - 257

SP - 8784

EP - 8787

JO - Applied Surface Science

JF - Applied Surface Science

IS - 21

ER -

Improving the photoluminescence properties of self-assembled InAs surface quantum dots by incorporation of antimony

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Keywords

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