Luminescence dynamics of Te doped CdS quantum dots at different doping levels
Abstract
We have examined steady-state and time-resolved luminescence properties of CdS:Te quantum dots (QDs). The transient emission spectra have a red shift along the emission process. Using singular value decomposition and multiexponential decay analysis, the luminescence is found to originate from two distinct and parallel channels: band-edge excitonic emission and trapping state emission. With increasing amount of Te, the emission peaks of the QDs show an obvious red shift. Our experimental results suggest that CdS: Te quantum dots have tunable emission spectra and luminescence lifetimes which may have applications in chemical sensing, high throughput screening and other biotechnological applications.
Keywords
PHOTOLUMINESCENCE DECAY; CDTE NANOCRYSTALS; EMISSION; STATES; TIME
DOI
10.1088/0957-4484/21/26/265704
Citation
Wenzhi Wu, Hongan Ye, Xiulin Ruan. Luminescence dynamics of Te doped CdS quantum dots at different doping levels. Nanotechnology, Volume 21, Number 26
Date of this Version
7-2010
Recommended Citation
Wu, Wenzhi; Ye, Hongan; and Ruan, X, "Luminescence dynamics of Te doped CdS quantum dots at different doping levels" (2010). Birck and NCN Publications. Paper 653.
http://dx.doi.org/10.1088/0957-4484/21/26/265704