Near-infrared bandgap Cd-rich PbxCd1-xS quantum dot with record long exciton lifetime

Zhi Li Teh; Robert J. Patterson; Stefan W. Tabernig; Abhinav Sharma; Shujuan Huang

doi:10.1109/PVSC43889.2021.9519035

Near-infrared bandgap Cd-rich Pb_xCd_1-xS quantum dot with record long exciton lifetime

Zhi Li Teh, Robert J. Patterson, Stefan W. Tabernig, Abhinav Sharma, Shujuan Huang

School of Engineering

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

Abstract

PbS/CdS core-shell quantum dots (QD) with diameters of <4 nm have previously only been demonstrated with the formation of a monolayer of pure phase CdS shell through cation exchange. The lattice mismatch between the zincblende CdS shell and the rocksalt PbS core limits the optimal thickness of the shell to 1 monolayer to prevent defect formation at the coreshell interface in order to maximize photoluminescence quantum yield (PLQY) and lifetime. This work demonstrates for the first time the formation of a Cd-rich Pb_0.35Cd_0.65S alloyed core-shell QD through cation exchange with a record long exciton lifetime of 3.8 μs and much-improved PLQY.

Original language	English
Title of host publication	2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	2475-2477
Number of pages	3
ISBN (Electronic)	9781665419222
ISBN (Print)	9781665430180
DOIs	https://doi.org/10.1109/PVSC43889.2021.9519035
Publication status	Published - 2021
Event	48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States Duration: 20 Jun 2021 → 25 Jun 2021

Publication series

Name
ISSN (Print)	0160-8371

Conference

Conference	48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/Territory	United States
City	Fort Lauderdale
Period	20/06/21 → 25/06/21

Keywords

alloyed quantum dot
lead sulfide
cadmium sulfide
cation exchange
core-shell

Access to Document

10.1109/PVSC43889.2021.9519035

Cite this

@inproceedings{87b494b3b14f47a7ae549697bf34991f,

title = "Near-infrared bandgap Cd-rich PbxCd1-xS quantum dot with record long exciton lifetime",

abstract = "PbS/CdS core-shell quantum dots (QD) with diameters of <4 nm have previously only been demonstrated with the formation of a monolayer of pure phase CdS shell through cation exchange. The lattice mismatch between the zincblende CdS shell and the rocksalt PbS core limits the optimal thickness of the shell to 1 monolayer to prevent defect formation at the coreshell interface in order to maximize photoluminescence quantum yield (PLQY) and lifetime. This work demonstrates for the first time the formation of a Cd-rich Pb0.35Cd0.65S alloyed core-shell QD through cation exchange with a record long exciton lifetime of 3.8 μs and much-improved PLQY. ",

keywords = "alloyed quantum dot, lead sulfide, cadmium sulfide, cation exchange, core-shell",

author = "Teh, {Zhi Li} and Patterson, {Robert J.} and Tabernig, {Stefan W.} and Abhinav Sharma and Shujuan Huang",

year = "2021",

doi = "10.1109/PVSC43889.2021.9519035",

language = "English",

isbn = "9781665430180",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

pages = "2475--2477",

booktitle = "2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)",

address = "United States",

note = "48th IEEE Photovoltaic Specialists Conference, PVSC 2021 ; Conference date: 20-06-2021 Through 25-06-2021",

}

Teh, ZL, Patterson, RJ, Tabernig, SW, Sharma, A & Huang, S 2021, Near-infrared bandgap Cd-rich Pb_xCd_1-xS quantum dot with record long exciton lifetime. in 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 2475-2477, 48th IEEE Photovoltaic Specialists Conference, PVSC 2021, Fort Lauderdale, United States, 20/06/21. https://doi.org/10.1109/PVSC43889.2021.9519035

Near-infrared bandgap Cd-rich Pb_xCd_1-xS quantum dot with record long exciton lifetime. / Teh, Zhi Li; Patterson, Robert J.; Tabernig, Stefan W. et al.
2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2021. p. 2475-2477.

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

TY - GEN

T1 - Near-infrared bandgap Cd-rich PbxCd1-xS quantum dot with record long exciton lifetime

AU - Teh, Zhi Li

AU - Patterson, Robert J.

AU - Tabernig, Stefan W.

AU - Sharma, Abhinav

AU - Huang, Shujuan

PY - 2021

Y1 - 2021

N2 - PbS/CdS core-shell quantum dots (QD) with diameters of <4 nm have previously only been demonstrated with the formation of a monolayer of pure phase CdS shell through cation exchange. The lattice mismatch between the zincblende CdS shell and the rocksalt PbS core limits the optimal thickness of the shell to 1 monolayer to prevent defect formation at the coreshell interface in order to maximize photoluminescence quantum yield (PLQY) and lifetime. This work demonstrates for the first time the formation of a Cd-rich Pb0.35Cd0.65S alloyed core-shell QD through cation exchange with a record long exciton lifetime of 3.8 μs and much-improved PLQY.

AB - PbS/CdS core-shell quantum dots (QD) with diameters of <4 nm have previously only been demonstrated with the formation of a monolayer of pure phase CdS shell through cation exchange. The lattice mismatch between the zincblende CdS shell and the rocksalt PbS core limits the optimal thickness of the shell to 1 monolayer to prevent defect formation at the coreshell interface in order to maximize photoluminescence quantum yield (PLQY) and lifetime. This work demonstrates for the first time the formation of a Cd-rich Pb0.35Cd0.65S alloyed core-shell QD through cation exchange with a record long exciton lifetime of 3.8 μs and much-improved PLQY.

KW - alloyed quantum dot

KW - lead sulfide

KW - cadmium sulfide

KW - cation exchange

KW - core-shell

UR - http://www.scopus.com/inward/record.url?scp=85115949931&partnerID=8YFLogxK

U2 - 10.1109/PVSC43889.2021.9519035

DO - 10.1109/PVSC43889.2021.9519035

M3 - Conference proceeding contribution

AN - SCOPUS:85115949931

SN - 9781665430180

SP - 2475

EP - 2477

BT - 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)

PB - Institute of Electrical and Electronics Engineers (IEEE)

CY - Piscataway, NJ

T2 - 48th IEEE Photovoltaic Specialists Conference, PVSC 2021

Y2 - 20 June 2021 through 25 June 2021

ER -