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Updated: Apr 23, 2026

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
Excellent nonlinear optical effects in the MoS2/CrOCl heterojunction
Xiaomin Wang1,2, Xiguang Wang1, Shi Qiu1
1Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, School of Physics, Dalian 116024, China. liuhongsheng@dlut.edu.cn.
This study explores the nonlinear optical (NLO) properties of MoS2/CrOCl heterojunctions. The material exhibits a strong bulk photovoltaic effect (BPVE), showing significant potential for advanced optoelectronic and photovoltaic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Optoelectronics
Background:
- Two-dimensional (2D) materials exhibit strong nonlinear optical (NLO) effects, driving interest in photonics and optoelectronics.
- Van der Waals (vdW) heterojunctions offer a method to tune the physical properties of 2D materials.
- A MoS2/CrOCl heterojunction has been experimentally realized, demonstrating high carrier mobility, on/off ratio, and air stability.
Purpose of the Study:
- To investigate the NLO properties of the experimentally obtained MoS2/CrOCl heterojunction.
- To explore phenomena such as second harmonic generation (SHG) and bulk photovoltaic effect (BPVE).
Main Methods:
- First-principles calculations were employed to study the NLO effects.
- The study focused on the MoS2/CrOCl vdW heterojunction.
Main Results:
- The MoS2/CrOCl heterojunction shows a robust bulk photovoltaic effect (BPVE) across the visible light spectrum.
- A remarkable shift photoconductivity of -1225.8 µA V-2 was observed at 469.7 nm wavelength.
- This BPVE is significantly stronger than that of conventional materials like BaTiO3 and PbTiO3.
Conclusions:
- The MoS2/CrOCl heterojunction possesses significant nonlinear optical properties, particularly a strong BPVE.
- These findings highlight the potential of MoS2/CrOCl heterojunctions for applications in optoelectronic devices, especially in photovoltaics.
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