Vapor Deposited Metal Halide Perovskites for Photovoltaics: Methods, Challenges and Prospects

Area of Science:

• Materials Science
• Chemical Engineering
• Solid State Physics

Background:

• Vapor-based deposition is crucial for fabricating metal halide perovskite (MHP) thin films via dry, solvent-free processes.
• Recent advances in techniques like coevaporation and sublimation offer control over film properties for high-performance devices.
• Challenges remain in material utilization, deposition rate, and scalability for MHP thin films.

Purpose of the Study:

• To provide a comprehensive review of vapor-phase strategies for MHP thin-film growth.
• To analyze the influence of deposition parameters on film nucleation, growth, and optoelectronic performance.
• To identify research gaps and barriers for scalable implementation of vapor-deposited MHP.

Main Methods:

• Review of coevaporation, sequential/single-source evaporation, close-space sublimation, chemical vapor deposition, sputtering, and laser-based deposition.
• Analysis of deposition parameters governing film nucleation and growth.
• Highlighting key milestones in perovskite solar cell development using vapor deposition.

Main Results:

• Vapor deposition techniques offer significant control over MHP film composition, crystallinity, and optoelectronic properties.
• Specific deposition parameters critically influence film nucleation, growth dynamics, and ultimately device performance.
• State-of-the-art perovskite solar cells have benefited from advancements in these vapor-phase methods.

Conclusions:

• Vapor-phase processing is vital for developing reliable, reproducible, and scalable MHP thin films.
• Further research is needed to bridge knowledge gaps in synthesis-structure-property relationships for vapor-deposited MHP.
• Addressing scalability barriers is essential for the next generation of optoelectronic devices.