Fluorescence of CdSe/ZnS quantum dots in solid solutions in the presence of organic molecules DODCI

• Published in: Journal of luminescence Vol. 110; no. 1; pp. 23 - 29
• Main Authors: Gorbatsevich, S.K., Kaputskaya, I.A., Mikhnevich, S.Yu, Artemyev, M.V., Nabiev, I.R., Strekal, N.D., Maskevich, S.A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2004; Elsevier
• Subjects: CdSe/ZnS quantum dot; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic excitation energy transfer; Engineering Sciences; Exact sciences and technology; Luminescence; Micro and nanotechnologies; Microelectronics; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Optics; Photoluminescence; Photonic; Physics; Quantum dots; Solid organic materials; CdSe/ZnS quantum dot; 33.50.−j; 78.67.Hc; Electronic excitation energy transfer; Luminescence; Polarization; Zinc sulfides; Inorganic compounds; Semiconductor materials; Organic dye; Quantum dots; Transition element compounds; Fluorescence; Nonradiative transitions; Cadmium selenides; PMMA; Solid solutions; 33.50.-j; 78.67.Hc Luminescence; Energy transfer; Photochemical degradation
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2004.03.003

Fluorescence characteristics of solid solutions of CdSe/ZnS quantum dots (donor) and organic dye 3,3′-Diethyloxadicarbocyanine iodide (acceptor) in polymethylmetacrylate films have been investigated. The fluorescence intensity increase caused by the exciting radiation at the frequency of the QD absorption has been found for the films containing both QDs and DODCI. The abrupt rise of the fluorescence polarization degree has been observed at the high-frequency edge of the radiation spectrum of these films. Possible processes (nonradiative electronic excitation energy transfer, acceptor photodegradation) accounting for the experimental dependences are also discussed.