We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Strain-Modulated Photoelectric Responses from a Flexible α-In<sub>2</sub>Se<sub>3</sub>/3R MoS<sub>2</sub> Heterojunction.
- Authors
Cai, Weifan; Wang, Jingyuan; He, Yongmin; Liu, Sheng; Xiong, Qihua; Liu, Zheng; Zhang, Qing
- Abstract
Highlights: A self-powered α-In2Se3/3R MoS2 heterojunction is successfully developed and shows strong photo response to the visible and near infrared light. The heterojunction photodetector delivers an ultrahigh photoresponsivity of 2.9 × 103 A W−1 and a substantial specific detectivity of 6.2 × 1010 Jones under a compressive strain of − 0.26%. This work demonstrates that the transport of photo generated carriers is clearly modulated by mechanical stimuli through the piezo-phototronic effect at the heterojunction interface.Semiconducting piezoelectric α-In2Se3 and 3R MoS2 have attracted tremendous attention due to their unique electronic properties. Artificial van der Waals (vdWs) heterostructures constructed with α-In2Se3 and 3R MoS2 flakes have shown promising applications in optoelectronics and photocatalysis. Here, we present the first flexible α-In2Se3/3R MoS2 vdWs p-n heterojunction devices for photodetection from the visible to near infrared region. These heterojunction devices exhibit an ultrahigh photoresponsivity of 2.9 × 103 A W−1 and a substantial specific detectivity of 6.2 × 1010 Jones under a compressive strain of − 0.26%. The photocurrent can be increased by 64% under a tensile strain of + 0.35%, due to the heterojunction energy band modulation by piezoelectric polarization charges at the heterojunction interface. This work demonstrates a feasible approach to enhancement of α-In2Se3/3R MoS2 photoelectric response through an appropriate mechanical stimulus.
- Publication
Nano-Micro Letters, 2021, Vol 13, Issue 1, p1
- ISSN
2311-6706
- Publication type
Article
- DOI
10.1007/s40820-020-00584-1