Compact layer free mixed-cation lead mixed-halide perovskite solar cells

Area of Science:

• Materials Science
• Renewable Energy
• Solid-State Physics

Background:

• Perovskite solar cells offer a promising alternative to traditional silicon photovoltaics.
• Developing efficient and stable perovskite materials is crucial for commercialization.
• Large-grain perovskite films are essential for high-performance solar devices.

Purpose of the Study:

• To fabricate thickness-tunable, large-grain perovskite thin films.
• To develop a simplified fabrication process for perovskite solar cells.
• To evaluate the performance of perovskite solar cells without electron-transport layers.

Main Methods:

• Fabrication of formamidinium cesium lead mixed-halide perovskite (FA_0.83Cs_0.17Pb(I_0.6Br_0.4)₃) thin films with controlled thickness and large grain size (up to 12 microns).
• Development of a simplified planar solar cell structure.
• Integration of perovskite films into functional solar cells without electron-transport layers (ETLs).

Main Results:

• Achieved thickness-tunable and compact FA_0.83Cs_0.17Pb(I_0.6Br_0.4)₃ perovskite thin films with large grain sizes.
• Successfully fabricated functional solar cells using a simplified planar structure.
• Demonstrated the feasibility of fabricating perovskite solar cells without the need for ETLs.

Conclusions:

• The developed perovskite films and fabrication method are suitable for creating efficient solar cells.
• The simplified structure without ETLs is a significant advancement for large-scale perovskite solar cell production.
• These findings pave the way for the cost-effective, large-scale manufacturing of perovskite solar cells.