A polarization-sensitive photothermoelectric photodetector based on mixed-dimensional SWCNT-MoS2 heterostructures

Pei-Yu Huang; Hong-Ji Chen; Jing-Kai Qin; Liang Zhen; Cheng-Yan Xu

doi:10.1039/d2na00609j

A polarization-sensitive photothermoelectric photodetector based on mixed-dimensional SWCNT-MoS₂ heterostructures

Nanoscale Adv. 2022 Sep 25;4(24):5290-5296. doi: 10.1039/d2na00609j. eCollection 2022 Dec 6.

Authors

Pei-Yu Huang¹, Hong-Ji Chen¹, Jing-Kai Qin¹, Liang Zhen^{1

2}, Cheng-Yan Xu^{1

2}

Affiliations

¹ Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China jk.qin@hit.edu.cn cy_xu@hit.edu.cn.
² MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology Harbin 150080 China.

Abstract

Mixed-dimensional van der Waals (vdW) integration has been demonstrated to be effective for the modulation of the physical properties of homogeneous materials. Herein, we reported the enhancement of photothermal conversion and decrease of thermal conductivity in metallic single-walled carbon nanotube (SWCNT) films with the integration of chemical vapor deposition-grown monolayer MoS₂ films. The induced temperature gradient in SWCNT-MoS₂ hybrid films drives carrier diffusion to generate photocurrent via the photothermoelectric (PTE) effect, and a self-powered photodetector working in the visible band range from 405 to 785 nm was demonstrated. The maximum responsivity of the device increases by 6 times compared to that of the SWCNT counterpart. More importantly, the mixed-dimensional device exhibits polarization-dependent photogeneration, showing a large anisotropy ratio of 1.55. This work paves a way for developing high-performance, polarization-sensitive photodetectors by mixed-dimensional integration.