Efficient FRET in new co-doped Tb(tmhd)3-CdSe/ZnS quantum dots-poly (methyl methacrylate) polymer nanocomposites for optoelectronic and sensor applications

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-12-25 DOI:10.1016/j.jlumin.2024.121047

Valiantsin Askirka , Vitali Stsiapura , Piotr Miluski

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Abstract

Poly (methyl methacrylate) nanocomposites co-doped with terbium(III) and CdSe/ZnS quantum dots, used as FRET donors and acceptors, respectively, were fabricated by free radical polymerization process in combination with ultrasonic treatment. Time-resolved photoluminescence measurements revealed that the growth of CdSe/ZnS content in co-doped samples leads to a decrease in FRET donor emission lifetime. However, the decay kinetics of terbium(III) remains mono-exponential.

We found that an efficient excitation energy transfer takes place in the co-doped samples since the decrease in the donor emission lifetime was accompanied by a simultaneous increase in the photoluminescence decay lifetime of the FRET acceptor.

The designed samples demonstrate stability of their optical properties in time with significant energy transfer efficiency in the range of ∼11–19 %. The dependence of FRET efficiency versus the acceptor/donor concentrations ratio is substantially linear.The energy transfer process provides sensitization of long-living QD emission since the FRET rate is much slower than the emission decay rate of the QD itself. The properties of obtained composites show the perspectives in engineering sophisticated luminescent materials for photonics and optoelectronics applications.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.