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Promising Fast Energy Transfer System Between Graphene Quantum Dots and the Application in Fluorescent Bioimaging

Gang Wang*†# , Peng He‡⊥#, Anli Xu‡⊥#, Qinglei Guo§, Jiurong Li†, Zihao Wang†, Zhiduo Liu∥|, Da Chen*†, Siwei Yang‡⊥ , and Guqiao Ding*†‡⊥

| First Published: 2019-01-22

Tunable photoluminescence performance of graphene quantum dots (GQDs) is one of the most important topics for the development of GQDs. In this paper, we report lattice-doped GQDs (boron-doped GQDs (B-GQDs) and phosphorus-doped GQDs (P-GQDs)). Because of the matched band structure, the fast energy transfer between blue-emitted B-GQDs (emission wavelength: 460 nm) and orange-emitted P-GQDs (emission wavelength: 630 nm) can induce an efficient fluorescence emission in P-GQDs once B-GQDs are excited under the optimal excitation wavelength of 460 nm. Moreover, with the effective energy transfer, the quantum yield of P-GQDs increased to 0.48, which is much higher than that of pure P-GQDs. We also demonstrated the potentials of this system for fluorescent bioimaging in vitro.

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