Enhanced Energy Transfer between Nitrogen‐Vacancy Centers and 2D MoS₂ Films Accurately Fabricated by Atomic Layer Deposition

Abstract Energy transfer between 2D MoS₂ films and fluorescent emitters is widely used in biological detection and imaging. In this paper, by regulating the thickness of the MoS₂ film on the diamond surface through the number of atomic layer deposition (ALD) cycles, the energy transfer efficiency between the nitrogen vacancy (NV) center and the MoS₂ film is improved and precisely controlled. When the number of ALD cycles is 8, the energy transfer efficiency between the 2D MoS₂ film and the NV center is 86.35%. Furthermore, when the number of ALD cycles is more significant than 140, compared with 2D and 3D graphene structures, the energy transfer efficiency of the NV center is increased by 126.55% and 24.60%, respectively. Meantime, the fluorescence lifetime of the NV center is reduced in the presence of the MoS₂ film, indicating that the MoS₂ film provides a new, additional fluorescence decay channel for the NV center in the MoS₂ film and the NV center system. Moreover, ALD can also effectively improve the tightness of the contact interface between the MoS₂ film and the diamond. This paper provides a new method and experimental basis for regulating the photon emission behavior of emitters.