Abstract
As the demand for new energy sources continues to grow, the market value of solar power, a key component of new energy, is also expanding. Van der Waals (vdW) heterojunctions made from two-dimensional (2D) semiconductors especially transition metal dichalcogenide (TMD), demonstrates immense potential in terms of the portability and efficiency of photovoltaic devices. Additionally, it shows great promise in the field of novel miniature high-speed photoelectric detectors. It offers multiple benefits, including high carrier mobility, tunable optical and electrical properties, enhanced optical properties and ultra-thinness, making it suitable for variant applications. This report reviewed the emerging 2D semiconductor Vdw heterojunction technologies on photodetection and photovoltaics. Summarized the advantages of MoS2/WSe2, WSe2/ReS2 and WSe2/WS2-based Vdw heterojunctions and their challenges. The continued research and development in this field are expected to lead to more efficient energy conversion, scalable fabrication methods, and broader commercial applications of these technologies.
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