MoS₂ Based Photodetectors: A Review.

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Transition metal dichalcogenides (TMDs), particularly molybdenum disulfide (MoS2), are extensively studied for photodetection.
• MoS2 offers desirable properties like a direct band gap in low dimensions, strong light interaction, and good carrier mobility for optoelectronic applications.

Purpose of the Study:

• This work reviews MoS2-based photodetectors, focusing on key performance metrics: responsivity, detectivity, response time, and dark current.
• The review explores strategies to enhance MoS2 photodetector performance by combining it with other materials.

Main Methods:

• The review analyzes MoS2 photodetectors' performance metrics.
• It examines the integration of nanoparticles (NPs) and quantum dots (QDs) with MoS2 to extend spectral response to near ultraviolet (NUV) and infrared (IR) ranges.
• Heterostructures with materials like graphene and the use of perovskites for stability are also discussed.

Main Results:

• Neat MoS2 photodetectors exhibit notable characteristics in the visible spectrum.
• Combining MoS2 with NPs and QDs boosts device response in NUV and IR regions.
• Heterostructures accelerate response times via built-in electric fields and efficient carrier transport.
• Perovskites improve device stability by acting as passivation layers or electron reservoirs.

Conclusions:

• MoS2 is a highly promising material for advanced photodetector applications.
• Hybrid approaches, including NPs, QDs, heterostructures, and perovskites, significantly enhance MoS2 photodetector performance and stability.
• Further research into these integrated systems will drive progress in optoelectronics and sensing technologies.