Details

Autor(en) / Beteiligte

• Yang, Ming
• Yang, Yunkun
• Liu, Qi
• Zhou, Hongxi
• Han, Jiayue
• Xie, Xiaoyi
• Xiu, Faxian
• Gou, Jun
• Wu, Zhiming
• Hu, Zehua
• Yu, Ting
• Wang, Jun
• Jiang, Yadong

Titel

A 3D topological Dirac semimetal/MoO 3 thin film heterojunction infrared photodetector with a current reversal phenomenon

Ist Teil von

• Journal of materials chemistry. C, Materials for optical and electronic devices, 2020-11, Vol.8 (45), p.16024-16031

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Photoelectric detection technology is extremely significant on account of its extensive applications in commercial and military fields, but high-performance array photodetectors based on Dirac semimetal thin film materials are rarely reported. Hence, we demonstrate photodetectors based on a three dimensional (3D) topological Dirac semimetal (DSM) (Cd 1−x Zn x ) 3 As 2 /MoO 3 array heterojunction, showing ultrahigh photoresponsivity, detectivity and external quantum efficiency in the ultra-broadband spectrum (405–4500 nm) of 3.1 A W −1 , 6.4 × 10 10 Jones and 855.8%, respectively, meanwhile possessing array unit performance repeatability and excellent time stability under atmospheric conditions at room temperature. The device exhibits an incredible current reversal phenomenon under the action of both light illumination and temperature variation elements, which can be attributed to a thermoelectromotive force effect. These excellent photoelectric properties illustrate that the fabrication of the 3D DSMs/inorganic thin film heterojunction is a suitable method for preparing distinguished infrared array photodetectors in the field of infrared telecommunications and scanning imaging.