Improving performance of CdSe/ZnS QDs via enhancing förster resonance energy transfer and suppressing auger recombination

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-11-28 DOI:10.1016/j.jlumin.2024.121004

Bo Li , Jilong Tang , Yangdi Wang , Qi Li , Cong Zhang , Chenlu Zhang , Ying Shi , Zhipeng Wei

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Abstract

In quantum dots (QDs) systems, Förster resonance energy transfer (FRET) and Auger recombination (AR) processes are crucial mechanisms that significantly impact their photoluminescence (PL) performance. Developing a strategy to simultaneously enhance FRET process and suppress the AR process is crucial. In this study, we reported that FRET process was enhanced, and the AR process was suppressed in the carbon-CdSe/ZnS QDs system via increasing carbon QDs donor ratios. The enhanced FRET rate is assigned to the increased adsorbed numbers and shortened donor-acceptor distance. The reduced AR rate is assigned to the decoration of the surface for CdSe/ZnS QDs acceptor in increased adsorbed numbers. As a result, the PL intensity of CdSe/ZnS QDs acceptor increased by over 3-fold. Our findings will stimulate the development of highly defined cascaded energy-transfer structures, aiming to achieve high-performance light-emitting devices.

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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.