1. Investigation of the Optical Properties of CdSe/ZnS Core/Shell Quantum Dot Embedded in an MEH-PPV Polymer Matrix
- Author
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M. Mahdouani, Ramzi Bourguiga, and Issam Hemdana
- Subjects
chemistry.chemical_classification ,Conductive polymer ,Work (thermodynamics) ,Materials science ,business.industry ,Applied Mathematics ,Exciton ,Composite number ,General Physics and Astronomy ,Transportation ,Statistical and Nonlinear Physics ,Polymer ,Atmospheric temperature range ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter::Materials Science ,chemistry ,Quantum dot ,Radiative transfer ,Optoelectronics ,business ,Mathematical Physics - Abstract
In this work, the role of poly[2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylene-vinylene] (MEH-PPV) as conducting polymer on the optical properties of the composite CdSe/ZnS core-shell quantum dots has been investigated. The optical properties of MEH-PPV polymer coated CdSe/ZnS composites are found to be dependent on the size of the quantum dot. A smaller CdSe quantum dot ensures a high exciton energy and smaller radiative lifetime. We found that the radiative lifetime in CdSe/ZnS embedded in MEH-PPV polymeric matrix is higher than that in CdSe/ZnS core-shell quantum dot. We also investigate the temperature dependence of the radiative lifetime over a temperature range from 100K to 300K; the temperature dependence of the radiative lifetime follows a quasi-exponential law. Consequently, the increasing temperature reduces the optical gap of MEH-PPV(CdSe/ZnS) polymer-CSQD. We found that the greater radiative lifetime corresponded to the larger values of temperatures.
- Published
- 2013
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