PUB-2017-HVD

Hybrid van der Waals SnO/MoS2 Heterojunctions for Thermal and Optical Sensing Applications

​"Zhenwei Wang, Xin He, Xi-Xiang Zhang, Husam N. Alshareef", Hybrid van der Waals SnO/MoS2 Heterojunctions for Thermal and Optical Sensing Applications
​Adv. Electron. Mater.​, DOI: 10.1002/aelm.201700396​
Zhenwei Wang, Xin He, ​Xi-Xiang Zhang, Husam N. Alshareef
SnO; MoS2; sensor
2017
​Emerging van der Waals heterojunctions (vdWH) containing 2D materials have shown exciting functionalities that surpass those of traditional devices based on bulk materials. In this Communication, a report on the properties of a 2D sulfide/oxide hybrid vdWH based on n-type molybdenum disulfide (MoS2) and p-type tin monoxide (SnO) is presented, with promising rectification, thermal-sensing, and photosensing performance. Specifically, the hybrid SnO/MoS2 vdWH shows static rectification ratio of 2 × 102 with ideality factor of 2.3, and can operate at 100 Hz with good stability. The vdWH shows good temperature stability with reversible and reproducible current levels up to 110 °C, indicating its potential for thermal sensing applications. The sensitivity of current variation is calculated to be 0.0144 dec °C−1. Finally, maximum responsivity of 8.17 mA W−1 and external quantum efficiency of 2.14% have been achieved in photovoltaic measurements. The results suggest that MoS2–SnO hybrid vdWH are promising for various sensing applications.