Phosphorescence quenching study of Cu(II)-ions-induced Mn-doped ZnS quantum dots revealed by intensity- and lifetime-resolved spectroscopy

Wu, Ruixiang; Luo, Junsheng; Guo, Xiaojun; Wang, Xiaoshuai; Ma, Ze-Hui; Li, Bin; Cheng, Liu-Yong; Miao, Xiang-Yang

doi:10.1016/j.cplett.2021.138960

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…Graphene oxide (GO) is an ideal material interacting with QDs because of its large specific surface area and excellent photoelectric properties and has attracted a great deal of research interest. − When QDs are combined with GO, the photogenerated excitons in QDs can be transferred to GO by energy transfer − or charge transfer, , which makes the preparation of photocatalytic devices, metal ion detectors, and biosensor devices ,, possible. He et al reported that the energy transfer rate in the CdSeTe/ZnS QD–GO composite can be improved by photoreduction of GO .…”

Section: Introductionmentioning

confidence: 99%

Energy Transfer from Dual-Emission Manganese-Doped Quantum Dots to Graphene Oxide

Wang

Luo

et al. 2022

J. Phys. Chem. C

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The combination of doped quantum dots (QDs) and graphene oxide (GO) results in QD−GO composites with enhanced light absorption properties. When exposed to light, the dual-emission Mn 2+ -doped ZnS QD−GO composite exhibits nonradiative energy transfer from photoexcited QDs to GO. Using steady-state spectroscopy and time-resolved spectroscopy, we find that the energy transfer efficiency between QDs' surface defects and GO is higher than that between isolated Mn 2+ ions and GO. Moreover, the increase of GO concentration and reduction degree can improve the electron population of defect states of QDs, while the electron population in Mn 2+ ions is relatively less affected by GO. This study leads to a better understanding of the energy transfer dynamics between dual-emitting Mn 2+ -doped ZnS QDs and GO and should greatly contribute to the design of high-performance QD-based optoelectronic devices.

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