Increasing crystallinity for improved electrical conductivity of TiO2 blocking layers

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Organic and hybrid solar cells offer promising alternatives to silicon-based devices.
• Improving charge carrier transport and separation is crucial for enhancing solar cell efficiency.
• Titanium dioxide (TiO2) is a key material for blocking layers in solar cells.

Purpose of the Study:

• To optimize the TiO2 blocking layer for improved organic and hybrid solar cell efficiency.
• To increase the electrical conductivity of the TiO2 layer for efficient charge carrier transport.
• To investigate the effect of calcination processes on TiO2 morphology and performance.

Main Methods:

• Optimization of calcination processes for sol-gel produced TiO2 films.
• Analysis of particle/domain size to enhance unpercolated pathways for charge carriers.
• Morphological studies of the TiO2 films to understand structure-property relationships.

Main Results:

• Achieved enhanced electrical conductivity in the TiO2 blocking layer.
• Increased particle/domain size in TiO2 films, leading to improved charge carrier pathways.
• Demonstrated potential for TiO2 blocking layer optimization to improve solar cell efficiency.

Conclusions:

• Optimized TiO2 blocking layers enhance charge carrier transport and separation in organic and hybrid solar cells.
• Calcination process tuning is effective in controlling TiO2 morphology and improving device performance.
• This research contributes to making organic and hybrid solar cells more competitive with silicon devices.