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

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	High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copper-doped ZnSe/ZnS quantum dots
	Xing G.2; Ji W.2; Zheng Y.1; Ying J.Y.1
	2008-04-14
Source Publication	Optics Express
ISSN	10944087
Volume	16 Issue:8 Pages:5710-5715
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 cm s photon 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. © 2008 Optical Society of America.
URL	View the original
Language	英語English
Fulltext Access	View Full-Text via Scopus
Document Type	Journal article
Collection	University of Macau
Affiliation	1.A-Star, Institute of Bioengineering and Nanotechnology 2.National University of Singapore
Recommended Citation GB/T 7714	Xing G.,Ji W.,Zheng Y.,et al. High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copper-doped ZnSe/ZnS quantum dots[J]. Optics Express, 2008, 16(8), 5710-5715.
APA	Xing G.., Ji W.., Zheng Y.., & Ying J.Y. (2008). High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copper-doped ZnSe/ZnS quantum dots. Optics Express, 16(8), 5710-5715.
MLA	Xing G.,et al."High efficiency and nearly cubic power dependence of below-band-edge photoluminescence in water-soluble, copper-doped ZnSe/ZnS quantum dots".Optics Express 16.8(2008):5710-5715.

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