Room-Temperature Solution-Processed 0D/1D Bilayer Electrodes for Translucent CsPbBr₃ Perovskite Photovoltaics

Area of Science:

• Materials Science
• Energy Science
• Nanotechnology

Background:

• Transparent electrodes (TEs) are crucial for high-performance translucent perovskite solar cells.
• Sputtered indium tin oxide (ITO) is a common rear TE but is costly and can damage underlying layers.
• There is a need for cost-effective and damage-free TEs for translucent solar cells.

Purpose of the Study:

• To develop a novel, low-cost transparent electrode for translucent perovskite solar cells.
• To evaluate the performance of a solution-processed ITO nanoparticle and silver nanowire bilayer TE.
• To compare the efficiency and optical properties of the new TE with traditional sputtered ITO.

Main Methods:

• Fabrication of a transparent electrode using solution-processed ITO nanoparticles (ITO-NPs).
• Coating ITO-NPs with silver nanowires (Ag-NWs) to form a 0D/1D bilayer structure.
• Integration of the developed TE into CsPbBr3 perovskite solar cells and performance characterization.

Main Results:

• The ITO-NPs/Ag-NW bilayer TE demonstrated a superior figure of merit compared to sputtered ITO.
• Perovskite solar cells with the 0D/1D TE showed comparable average visible transmission to those with sputtered ITO.
• The power conversion efficiency of cells with the 0D/1D TE reached 5.64%, outperforming the 4.14% efficiency of cells with sputtered ITO.

Conclusions:

• Solution-processed ITO-NPs/Ag-NW bilayer TEs offer a promising alternative to sputtered ITO for translucent perovskite solar cells.
• This approach enables low-cost, ambient air, room-temperature processing.
• The findings pave the way for efficient and affordable translucent solar cell development.