Acceptor concentration dependent Fo?rster resonance energy transfer in nanocrystal-molecule complexes revealed by spectral analysis*
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Abstract:
A nanocrystal-molecule complex composed of CdSe donor and Rhodamine B (RhB) acceptor is prepared to investigate the effect of accepter-donor ratio on the Fo?rster resonance energy transfer (FRET) process. To highlight the FRET process, the energy level alignment between CdSe and RhB is purposefully designed and CdSe nanocrystal is coated with a wide band-gap ZnS shell. The carrier dynamics is observed via combined spectral analysis. The results reveal clear FRET process between the CdSe donor and RhB acceptor. The FRET is enhanced by increasing RhB/CdSe ratio and a gradual saturation will be present at high RhB concentration.
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Project Supported:
the National Natural Science Foundation of China (22279031), Joint Foundation for Innovation and Development of Hubei Natural Science Foundation (2023AFD032 and 2022CFD079)，Teacher Research Ability Cultivation Foundation of Hubei University of Arts and Science (2020kypytd001 and 2021kpgj01)，Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices (HLOM241003 and HLOM242013)
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