Optimized SnO₂ Thin Films: Correlating Solution Chemistry and Deposition Conditions with Optoelectronic Properties

Area of Science:

• Materials Science
• Thin Film Deposition
• Optoelectronics

Background:

• Tin oxide (SnO2) thin films are crucial for optoelectronics.
• Scalable deposition techniques like aerosol-assisted chemical vapor deposition (AACVD) are vital.
• Optimization of SnO2 films using SnCl4 precursor via AACVD is under-explored.

Purpose of the Study:

• Investigate the effects of solvent composition, deposition temperature, and misting time on SnO2 film properties.
• Address the gap in literature regarding SnCl4 precursor optimization via AACVD.
• Enhance understanding of SnO2 film growth parameters.

Main Methods:

• Aerosol-assisted chemical vapor deposition (AACVD) using SnCl4 precursor.
• Systematic variation of solvent composition, deposition temperature, and misting time.
• Characterization of film microstructure, optical transparency, and electrical performance, including residual chlorine quantification.

Main Results:

• Optimized deposition conditions led to SnO2 films with high optical transparency.
• Achieved low electrical resistivity in SnO2 films, comparable to doped systems.
• Quantified residual chlorine content in the deposited films.

Conclusions:

• Controlled solution chemistry and deposition parameters are key for fabricating high-performance SnO2 films.
• The findings provide a pathway for optimizing SnO2 films for optoelectronic devices.
• Insights are applicable to improving commercial fluorine-doped tin oxide (FTO) film production.