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.