High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copperdoped ZnSe/ZnS quantum dots

Guichuan Xing; Wei Ji; Yuangang Zheng; Jackie Y. Ying

doi:10.1364/OE.16.005715

High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copperdoped ZnSe/ZnS quantum dots

Guichuan Xing
, Wei Ji^*
, Yuangang Zheng
, Jackie Y. Ying

^*Corresponding author for this work

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

27 Scopus citations

Abstract

Three-photon absorption (3PA) and three-photon-excited photoluminescence (3PE-PL) of ZnSe/ZnS and copper-doped ZnSe/ZnS core-shell quantum dots (QDs) in aqueous solutions have been unambiguously determined by Z-scan and 3PE-PL measurements with 200- fs laser pulses at 1000 nm. The 3PA cross-section is as high as 3.5 × 10-77 cm6 s2 photon-2 for 4.1 nm-sized, copper-doped ZnSe/ZnS QDs, while their below-band-edge PL is found to be nearly cubic dependent on the excitation intensity, with efficiency enhanced by ˜ 20 fold compared to the undoped ZnSe/ZnS QDs.

Original language	English
Pages (from-to)	5715-5720
Number of pages	6
Journal	Optics Express
Volume	16
Issue number	8
DOIs	https://doi.org/10.1364/OE.16.005715
State	Published - 14 Apr 2008
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copperdoped ZnSe/ZnS quantum dots",

abstract = "Three-photon absorption (3PA) and three-photon-excited photoluminescence (3PE-PL) of ZnSe/ZnS and copper-doped ZnSe/ZnS core-shell quantum dots (QDs) in aqueous solutions have been unambiguously determined by Z-scan and 3PE-PL measurements with 200- fs laser pulses at 1000 nm. The 3PA cross-section is as high as 3.5 × 10-77 cm6 s2 photon-2 for 4.1 nm-sized, copper-doped ZnSe/ZnS QDs, while their below-band-edge PL is found to be nearly cubic dependent on the excitation intensity, with efficiency enhanced by ˜ 20 fold compared to the undoped ZnSe/ZnS QDs.",

author = "Guichuan Xing and Wei Ji and Yuangang Zheng and Ying, \{Jackie Y.\}",

year = "2008",

month = apr,

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doi = "10.1364/OE.16.005715",

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journal = "Optics Express",

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TY - JOUR

T1 - High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copperdoped ZnSe/ZnS quantum dots

AU - Xing, Guichuan

AU - Ji, Wei

AU - Zheng, Yuangang

AU - Ying, Jackie Y.

PY - 2008/4/14

Y1 - 2008/4/14

N2 - Three-photon absorption (3PA) and three-photon-excited photoluminescence (3PE-PL) of ZnSe/ZnS and copper-doped ZnSe/ZnS core-shell quantum dots (QDs) in aqueous solutions have been unambiguously determined by Z-scan and 3PE-PL measurements with 200- fs laser pulses at 1000 nm. The 3PA cross-section is as high as 3.5 × 10-77 cm6 s2 photon-2 for 4.1 nm-sized, copper-doped ZnSe/ZnS QDs, while their below-band-edge PL is found to be nearly cubic dependent on the excitation intensity, with efficiency enhanced by ˜ 20 fold compared to the undoped ZnSe/ZnS QDs.

AB - Three-photon absorption (3PA) and three-photon-excited photoluminescence (3PE-PL) of ZnSe/ZnS and copper-doped ZnSe/ZnS core-shell quantum dots (QDs) in aqueous solutions have been unambiguously determined by Z-scan and 3PE-PL measurements with 200- fs laser pulses at 1000 nm. The 3PA cross-section is as high as 3.5 × 10-77 cm6 s2 photon-2 for 4.1 nm-sized, copper-doped ZnSe/ZnS QDs, while their below-band-edge PL is found to be nearly cubic dependent on the excitation intensity, with efficiency enhanced by ˜ 20 fold compared to the undoped ZnSe/ZnS QDs.

UR - https://www.scopus.com/pages/publications/42149109702

U2 - 10.1364/OE.16.005715

DO - 10.1364/OE.16.005715

M3 - Article

C2 - 18542679

AN - SCOPUS:42149109702

SN - 1094-4087

VL - 16

SP - 5715

EP - 5720

JO - Optics Express

JF - Optics Express

IS - 8

ER -

High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copperdoped ZnSe/ZnS quantum dots

Abstract

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