Shell thickness influence on the carrier dynamics of InP/ZnS QDs

Yanmin Xu; Lihe Yan; Shaomin Fu; Yuanyuan Lv

doi:10.1016/j.chphi.2024.100579

Shell thickness influence on the carrier dynamics of InP/ZnS QDs

Yanmin Xu
, Lihe Yan
, Shaomin Fu
, Yuanyuan Lv

Faculty of Electronic and Information Engineering

Xi'an University of Science and Technology
Ltd.

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

10 Scopus citations

Abstract

InP/ZnS core/shell quantum dots (QDs) have been widely applied in many fields due to their excellent luminescence performance. In this study, the correlation between the ZnS shell thickness and the ultrafast carrier dynamics in InP/ZnS QDs was investigated by using femtosecond time-resolved transient absorption spectroscopy and time-resolved photoluminescence techniques. We found that a thicker ZnS shell could confine more carriers to the InP core, thus effectively weakening the interactions between the carriers in the core and the interfacial defect states; this further enhanced the quantum yields and photoluminescence properties in InP/ZnS QDs.

Original language	English
Article number	100579
Journal	Chemical Physics Impact
Volume	8
DOIs	https://doi.org/10.1016/j.chphi.2024.100579
State	Published - Jun 2024

Keywords

Carrier dynamics
InP/ZnS core/shell quantum dots
Nonlinear optics
Shell thickness
Transient absorption spectrum

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10.1016/j.chphi.2024.100579

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title = "Shell thickness influence on the carrier dynamics of InP/ZnS QDs",

abstract = "InP/ZnS core/shell quantum dots (QDs) have been widely applied in many fields due to their excellent luminescence performance. In this study, the correlation between the ZnS shell thickness and the ultrafast carrier dynamics in InP/ZnS QDs was investigated by using femtosecond time-resolved transient absorption spectroscopy and time-resolved photoluminescence techniques. We found that a thicker ZnS shell could confine more carriers to the InP core, thus effectively weakening the interactions between the carriers in the core and the interfacial defect states; this further enhanced the quantum yields and photoluminescence properties in InP/ZnS QDs.",

keywords = "Carrier dynamics, InP/ZnS core/shell quantum dots, Nonlinear optics, Shell thickness, Transient absorption spectrum",

author = "Yanmin Xu and Lihe Yan and Shaomin Fu and Yuanyuan Lv",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)",

year = "2024",

month = jun,

doi = "10.1016/j.chphi.2024.100579",

language = "英语",

volume = "8",

journal = "Chemical Physics Impact",

issn = "2667-0224",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Shell thickness influence on the carrier dynamics of InP/ZnS QDs

AU - Xu, Yanmin

AU - Yan, Lihe

AU - Fu, Shaomin

AU - Lv, Yuanyuan

PY - 2024/6

Y1 - 2024/6

N2 - InP/ZnS core/shell quantum dots (QDs) have been widely applied in many fields due to their excellent luminescence performance. In this study, the correlation between the ZnS shell thickness and the ultrafast carrier dynamics in InP/ZnS QDs was investigated by using femtosecond time-resolved transient absorption spectroscopy and time-resolved photoluminescence techniques. We found that a thicker ZnS shell could confine more carriers to the InP core, thus effectively weakening the interactions between the carriers in the core and the interfacial defect states; this further enhanced the quantum yields and photoluminescence properties in InP/ZnS QDs.

AB - InP/ZnS core/shell quantum dots (QDs) have been widely applied in many fields due to their excellent luminescence performance. In this study, the correlation between the ZnS shell thickness and the ultrafast carrier dynamics in InP/ZnS QDs was investigated by using femtosecond time-resolved transient absorption spectroscopy and time-resolved photoluminescence techniques. We found that a thicker ZnS shell could confine more carriers to the InP core, thus effectively weakening the interactions between the carriers in the core and the interfacial defect states; this further enhanced the quantum yields and photoluminescence properties in InP/ZnS QDs.

KW - Carrier dynamics

KW - InP/ZnS core/shell quantum dots

KW - Nonlinear optics

KW - Shell thickness

KW - Transient absorption spectrum

UR - https://www.scopus.com/pages/publications/85189178648

U2 - 10.1016/j.chphi.2024.100579

DO - 10.1016/j.chphi.2024.100579

M3 - 文章

AN - SCOPUS:85189178648

SN - 2667-0224

VL - 8

JO - Chemical Physics Impact

JF - Chemical Physics Impact

M1 - 100579

ER -

Shell thickness influence on the carrier dynamics of InP/ZnS QDs

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Keywords

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