3.88% efficient tin sulfide solar cells using congruent thermal evaporation

Area of Science:

• Materials Science
• Solid State Physics
• Renewable Energy

Background:

• Tin sulfide (SnS) is an emerging absorber material for thin-film photovoltaic applications.
• Controlling the composition of absorber layers is crucial for efficient solar cell performance.

Purpose of the Study:

• To investigate the evaporation properties of tin sulfide (SnS).
• To demonstrate a SnS-based heterojunction solar cell.
• To analyze performance losses and identify areas for improvement.

Main Methods:

• Congruent evaporation studies of SnS.
• Fabrication of SnS heterojunction solar cells.
• Certified power conversion efficiency measurements.
• Empirical loss analysis.

Main Results:

• SnS was confirmed to evaporate congruently, simplifying composition control.
• A SnS heterojunction solar cell was successfully demonstrated.
• The device achieved a certified power conversion efficiency of 3.88%.

Conclusions:

• Congruent evaporation of SnS facilitates facile composition control, similar to cadmium telluride.
• The demonstrated SnS solar cell performance provides a baseline for further development.
• Loss analysis offers a roadmap for enhancing future SnS-based photovoltaic devices.