Enhanced fluorescence resonance energy transfer in CsPbBr3 quantum dot-rhodamine 640 molecule hybrid system: Toward high-efficiency and high-rate capability

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-21 DOI:10.1016/j.jphotochem.2025.116283

Bo Li , Yongfeng Wan , Caifeng Xiu , Yuliang Liu , Qi Li , Lixia Zhu , Hang Yin , Ying Shi

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Abstract

The fluorescence resonance energy transfer (FRET) process plays a crucial role in improving the efficiency of optoelectronic and photosynthetic devices. CsPbBr₃ perovskite quantum dot (QD) serves as efficient photon absorbers and exciton generators, thus offering the potential to enhance FRET performance. However, a high-efficiency FRET process with high-rate capability has not been achieved in the CsPbBr₃ perovskite QD-based system. Herein, we reported that the FRET process is improved in CsPbBr₃ perovskite QD-rhodamine 640 molecule hybrid system in n-hexane solution. This phenomenon stems from an increased number of adsorbed acceptor and a decreased distance between donor and acceptor. When the adsorbed number reached 4.2, a near-unity FRET efficiency of 99.3 % was achieved. Meanwhile, femtosecond transient absorption spectroscopy reveals that the FRET process exhibits a high-rate capability of 0.57 ps⁻¹. Consequently, this research will stimulate the development of high-performance light-emitting device of perovskite-based system.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.