High‐Performance Broadband Photodetectors of Heterogeneous 2D Inorganic Molecular Sb<sub>2</sub>O<sub>3</sub>/Monolayer MoS<sub>2</sub> Crystals Grown via Chemical Vapor Deposition
Kun Ye, Lixuan Liu, Junquan Huang, Anmin Nie, Kun Zhai, Bochong Wang, Fusheng Wen, Congpu Mu, Zhisheng Zhao, Yongji Gong, Jianyong Xiang, Yongjun Tian, Zhongyuan Liu
Abstract
Abstract The newly emerged 2D materials heterostructures, including layered and nonlayered structures, are regarded as the building blocks for future high performance optoelectronic devices. However, it still remains a great challenge to directly synthesize 2D heterostructures for realizing broadband detection in photodetectors. In this work, the growth of vertically stacked inorganic molecular Sb 2 O 3 /monolayer MoS 2 heterostructures through a two‐step chemical vapor deposition method is demonstrated, and high performance ultraviolet/near‐infrared photodetectors based on the achieved heterostructures are further developed. Excellent responsivity of 5.3 × 10 4 A W −1 and detectivity of 2.0 × 10 15 Jones are obtained under 457 nm illumination. Additionally, the photodetection range can be extended to near‐infrared region. Maximum responsivity of 7.8 A W −1 , detectivity of 3.4 × 10 11 Jones, and fast response speed (<60 ms) are obtained under 1064 nm laser illumination at room temperature, which is far superior to those of the previously reported ultra‐thin 2D van de Waals heterostructures. The inorganic molecular Sb 2 O 3 /monolayer MoS 2 heterostructures enrich the family of 2D materials heterostructures, showing potential applications in high performance functional electronics and optoelectronics.