Acta Photonica Sinica, Volume. 46, Issue 9, 916001(2017)
Spectra Cross-sections of CdSxSe1-x/ZnS(core/shell) Quantum Dots and Photoluminescent Transmission of the Doped Fiber
The absorption coefficient, absorption and emission cross-sections of CdSxSe1-x/ZnS (core/shell) Quantum Dots (QDs) were determined by measuring absorption-emission spectra of the QDs with different composition ratio x. The absorption cross-section of QDs shows an increase with the increase of QD size, and shows a decrease with the x increase. In addition, CdS0.4Se0.6/ZnS QDs doped fibers are prepared in a solid fiber core of ultraviolet gel in the doping concentration of 0.1~5 mg/mL. The absorption decay rate of 473 nm laser pumped into the QDs doped fiber are measured for different doping concentrations. There is evidence to show that the absorption-decay rate and the cross-section are weakly associated with the doping concentration, and the photoluminescence-peak intensity of the doped fiber varies with the fiber length and the doping concentration. There is a saturating doping concentration and desired fiber length corresponding to the maximum photoluminescent intensity. The experimental results provide a support for development of CdSxSe1-x/ZnS-QDs doped photoelectronic devices in the future.
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CHENG Cheng, HUANG Yuan, YAO Jian-hua. Spectra Cross-sections of CdSxSe1-x/ZnS(core/shell) Quantum Dots and Photoluminescent Transmission of the Doped Fiber[J]. Acta Photonica Sinica, 2017, 46(9): 916001
Received: May. 3, 2017
Accepted: --
Published Online: Oct. 16, 2017
The Author Email: Cheng CHENG (chengch@zjut.edu.cn)