Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots

Jianying Ouyang; John A. Ripmeester; Xiaohua Wu; David Kingston; Kui Yu; Alan G. Joly; Wei Chen

doi:10.1021/jp074416b

Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots

Jianying Ouyang, John A. Ripmeester, Xiaohua Wu, David Kingston, Kui Yu^*, Alan G. Joly, Wei Chen

^*Corresponding author for this work

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

57 Citations (Scopus)

Abstract

Upconversion luminescence is observed from colloidal CdS and CdZnS quantum dots dispersed in hexanes. These binary and ternary nanocrystals were synthesized via noninjection approaches and at relatively low temperature and exhibit cubic crystal structures and narrow size distributions. The upconversion luminescence of these nanocrystal ensembles is similar to their corresponding photoluminescence emission, regarding peak shape, position, and dynamics. The upconversion luminescence yield exhibits a near-quadratic laser power dependence. Accordingly, our study indicates that the upconversion luminescence is due to two-photon excitation.

Original language	English
Pages (from-to)	16261-16266
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	44
DOIs	https://doi.org/10.1021/jp074416b
Publication status	Published - 8 Nov 2007
Externally published	Yes

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title = "Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots",

abstract = "Upconversion luminescence is observed from colloidal CdS and CdZnS quantum dots dispersed in hexanes. These binary and ternary nanocrystals were synthesized via noninjection approaches and at relatively low temperature and exhibit cubic crystal structures and narrow size distributions. The upconversion luminescence of these nanocrystal ensembles is similar to their corresponding photoluminescence emission, regarding peak shape, position, and dynamics. The upconversion luminescence yield exhibits a near-quadratic laser power dependence. Accordingly, our study indicates that the upconversion luminescence is due to two-photon excitation.",

author = "Jianying Ouyang and Ripmeester, {John A.} and Xiaohua Wu and David Kingston and Kui Yu and Joly, {Alan G.} and Wei Chen",

year = "2007",

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T1 - Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots

AU - Ouyang, Jianying

AU - Ripmeester, John A.

AU - Wu, Xiaohua

AU - Kingston, David

AU - Yu, Kui

AU - Joly, Alan G.

AU - Chen, Wei

PY - 2007/11/8

Y1 - 2007/11/8

N2 - Upconversion luminescence is observed from colloidal CdS and CdZnS quantum dots dispersed in hexanes. These binary and ternary nanocrystals were synthesized via noninjection approaches and at relatively low temperature and exhibit cubic crystal structures and narrow size distributions. The upconversion luminescence of these nanocrystal ensembles is similar to their corresponding photoluminescence emission, regarding peak shape, position, and dynamics. The upconversion luminescence yield exhibits a near-quadratic laser power dependence. Accordingly, our study indicates that the upconversion luminescence is due to two-photon excitation.

AB - Upconversion luminescence is observed from colloidal CdS and CdZnS quantum dots dispersed in hexanes. These binary and ternary nanocrystals were synthesized via noninjection approaches and at relatively low temperature and exhibit cubic crystal structures and narrow size distributions. The upconversion luminescence of these nanocrystal ensembles is similar to their corresponding photoluminescence emission, regarding peak shape, position, and dynamics. The upconversion luminescence yield exhibits a near-quadratic laser power dependence. Accordingly, our study indicates that the upconversion luminescence is due to two-photon excitation.

UR - http://www.scopus.com/inward/record.url?scp=36348970484&partnerID=8YFLogxK

U2 - 10.1021/jp074416b

DO - 10.1021/jp074416b

M3 - Article

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VL - 111

SP - 16261

EP - 16266

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 44

ER -

Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots

Abstract

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