Laser-Induced Synthesis of Tin Sulfides.

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Van der Waals (vdW) materials, including tin sulfides, possess unique electronic properties suitable for multifunctional devices.
• Controlling the polytypes and heterostructures of tin sulfides is crucial for optimizing device performance.

Purpose of the Study:

• To demonstrate the direct and selective growth of tin sulfides using laser irradiation.
• To investigate the tunability of tin sulfide phases and heterostructures through laser parameters.
• To evaluate the performance of laser-synthesized tin sulfides in photodetector applications.

Main Methods:

• Synthesis of centimeter-scale tin sulfide tracks using a 532 nm continuous wave laser and a single-source precursor (tin(II) o-ethylxanthate) under ambient conditions.
• Modulation of laser irradiation parameters to control phase dominance and form SnS2/SnS heterostructures.
• Characterization of morphological, structural, and compositional properties of the synthesized materials.

Main Results:

• Successful centimeter-scale synthesis of tin sulfide tracks via selective laser irradiation.
• Tunable formation of different tin sulfide polytypes and SnS2/SnS heterostructures by adjusting laser conditions.
• Laser-synthesized tin sulfide photodetectors exhibited broad spectral response, high photoresponsivity (up to 4 AW⁻¹), and fast switching times (rise: 1.8 ms, fall: 16 ms).

Conclusions:

• Laser irradiation provides a versatile and direct method for selective growth of tin sulfides with tunable properties.
• The synthesized tin sulfides demonstrate promising performance for optoelectronic applications, particularly in photodetectors.
• This laser-based approach holds potential for applications in energy conversion, catalysis, and chemical sensing.