Investigation on photoluminescence quenching of CdSe/ZnS quantum dots by organic charge transporting materials

• Autorzy: Qu Y. , Zhang L. , An L. , Wei H.

Identyfikatory

DOI

10.1515/msp-2015-0120

• Języki publikacji: EN

Abstrakty

EN

The effect of different organic charge transporting materials on the photoluminescence of CdSe/ZnS core/shell quantum dots has been studied by means of steady-state and time-resolved photoluminescence spectroscopy. With an increase in concentration of the organic charge transporting material in the quantum dots solutions, the photoluminescence intensity of CdSe/ZnS quantum dots was quenched greatly and the fluorescence lifetime was shortened gradually. The quenching efficiency of CdSe/ZnS core/shell quantum dots decreased with increasing the oxidation potential of organic charge transporting materials. Based on the analysis, two pathways in the photoluminescence quenching process have been defined: static quenching and dynamic quenching. The dynamic quenching is correlated with hole transporting from quantum dots to the charge transporting materials.

Słowa kluczowe

EN

quantum dots; charge transporting; photoluminescence quenching

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2015
• Tom: Vol. 33, No. 4
• Strony: 709--713
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Qu Y.

• College of Physics Science and Technology, Heilongjiang University, Harbin, China

autor

Zhang L.

• Department of Optoelectric Information Science and Engineering, Harbin University of Science and Technology, West campus, P.O.Box 130, Harbin 150080, China

autor

An L.

• College of Physics Science and Technology, Heilongjiang University, Harbin, China

autor

Wei H.

• College of Physics Science and Technology, Heilongjiang University, Harbin, China

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