This review discusses the recent advancements in optoelectronic applications based on two-dimensional (2D) tungsten disulfide (WS₂) nanomaterials. WS₂ is a promising material with excellent electrical, magnetic, optical, and mechanical properties, making it suitable for various optoelectronic devices. The article covers recent developments in devices such as light-emitting diodes (LEDs), sensors, field-effect transistors (FETs), photodetectors, and memory devices. It highlights the importance of improving WS₂-based devices through methods like defect introduction and doping. The review also emphasizes the significance of WS₂ in the development of transition-metal oxides for optoelectronic applications. WS₂ exhibits strong photoluminescence and high anisotropy, making it ideal for optoelectronic applications. The article discusses various applications, including polarized LEDs, ordinary monochrome LEDs, wavelength-adjustable LEDs, and sensors. WS₂-based sensors have shown high sensitivity and selectivity for gases such as formaldehyde, ethanol, nitric oxide, hydrogen sulfide, and ammonia. These sensors are capable of detecting gases at very low concentrations and have good stability and repeatability. The review also covers the preparation methods of WS₂, including top-down and bottom-up techniques. The synthesis of WS₂ nanosheets is challenging due to their tendency to cluster into nanoparticles. The article discusses various synthesis methods, including hydrothermal, sol-gel, chemical vapor deposition, and pulsed laser deposition. The article also highlights the importance of controlling the morphology and structure of WS₂ to enhance its optoelectronic properties. In terms of transistors, WS₂ is a promising channel material due to its low effective mass and high mobility, allowing for the miniaturization of transistors. The article discusses the development of high-performance transistors using WS₂, including the use of 3R stacked dual-layer WS₂ for improved performance. The review concludes that WS₂ has significant potential in optoelectronic applications and that further research is needed to fully exploit its capabilities.This review discusses the recent advancements in optoelectronic applications based on two-dimensional (2D) tungsten disulfide (WS₂) nanomaterials. WS₂ is a promising material with excellent electrical, magnetic, optical, and mechanical properties, making it suitable for various optoelectronic devices. The article covers recent developments in devices such as light-emitting diodes (LEDs), sensors, field-effect transistors (FETs), photodetectors, and memory devices. It highlights the importance of improving WS₂-based devices through methods like defect introduction and doping. The review also emphasizes the significance of WS₂ in the development of transition-metal oxides for optoelectronic applications. WS₂ exhibits strong photoluminescence and high anisotropy, making it ideal for optoelectronic applications. The article discusses various applications, including polarized LEDs, ordinary monochrome LEDs, wavelength-adjustable LEDs, and sensors. WS₂-based sensors have shown high sensitivity and selectivity for gases such as formaldehyde, ethanol, nitric oxide, hydrogen sulfide, and ammonia. These sensors are capable of detecting gases at very low concentrations and have good stability and repeatability. The review also covers the preparation methods of WS₂, including top-down and bottom-up techniques. The synthesis of WS₂ nanosheets is challenging due to their tendency to cluster into nanoparticles. The article discusses various synthesis methods, including hydrothermal, sol-gel, chemical vapor deposition, and pulsed laser deposition. The article also highlights the importance of controlling the morphology and structure of WS₂ to enhance its optoelectronic properties. In terms of transistors, WS₂ is a promising channel material due to its low effective mass and high mobility, allowing for the miniaturization of transistors. The article discusses the development of high-performance transistors using WS₂, including the use of 3R stacked dual-layer WS₂ for improved performance. The review concludes that WS₂ has significant potential in optoelectronic applications and that further research is needed to fully exploit its capabilities.