Preparation of MoS2-MoO3 Hybrid Nanomaterials for Light-Emitting Diodes

• Published in: Angewandte Chemie International Edition 2014-11, Vol.53 (46), p.12560-12565
• Main Authors: Yin, Zongyou, Zhang, Xiao, Cai, Yongqing, Chen, Junze, Wong, Jen It, Tay, Yee-Yan, Chai, Jianwei, Wu, Jumiati, Zeng, Zhiyuan, Zheng, Bing, Yang, Hui Ying, Zhang, Hua
• Format: Article
• Language: English
• Subjects: electroluminescence; hybrid nanomaterials; Information storage; Light emitting diodes; molybdenum; Nanomaterials; p-type doping
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.201402935

A facile strategy to prepare MoS2–MoO3 hybrid nanomaterials is developed, based on the heat‐assisted partial oxidation of lithium‐exfoliated MoS2 nanosheets in air followed by thermal‐annealing‐driven crystallization. The obtained MoS2–MoO3 hybrid nanomaterial exhibits p‐type conductivity. As a proof‐of‐concept application, an n‐type SiC/p‐type MoS2–MoO3 heterojunction is used as the active layer for light‐emitting diodes. The origins of the electroluminescence from the device are theoretically investigated. This facile synthesis and application of hybrid nanomaterials opens up avenues to develop new advanced materials for various functional applications, such as in electrics, optoelectronics, clean energy, and information storage. LED's glow: MoS2–MoO3 hybrid nanomaterials are prepared by the heat‐assisted partial oxidation of MoS2 nanosheets in air (1) followed by a thermal‐annealing‐driven crystallization (2). The obtained hybrid nanomaterial exhibits p‐type conductivity and is employed in a heterojunction of n‐type SiC/p‐type MoS2–MoO3 for light‐emitting diodes (3), from which multi‐wavelength electroluminescent emission is detected.