Microhole Structure in Flexible Semitransparent Perovskite Solar Cells Using Nickel Mesh as the Framework and...

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Semitransparent perovskite solar cells (PSCs) offer auxiliary power for applications like power-generating windows.
• Conventional planar PSCs face limitations in power conversion efficiency (PCE) and average visible light transmittance (AVT) due to perovskite layer constraints.
• Developing PSCs with high efficiency and transparency is crucial for broader applications.

Purpose of the Study:

• To introduce a novel three-dimensional (3D) mesh structure for semitransparent perovskite solar cells.
• To overcome the trade-off between PCE and AVT in conventional planar PSCs.
• To enhance the mechanical flexibility and stability of semitransparent PSCs.

Main Methods:

• Fabrication of a 3D mesh structure using nickel mesh as the framework and bottom electrode.
• Deposition of narrow band gap perovskite materials onto the 3D nickel mesh structure.
• Characterization of the device's PCE, AVT, color rendering index, bifacial coefficient, and mechanical stability.

Main Results:

• The 3D mesh PSC achieved a PCE of 4.48% and an AVT of 16.5%.
• The device exhibited a high color rendering index (98.35) and a bifacial coefficient of 79%.
• The flexible nickel mesh enabled excellent mechanical stability, retaining 90% of initial PCE after 1000 bending cycles.

Conclusions:

• The 3D mesh structure offers a new strategy for high-efficiency, high-transmittance semitransparent flexible PSCs.
• This innovative design addresses limitations of planar PSCs, paving the way for advanced solar technologies.
• The technology holds promise for applications in building-integrated photovoltaics and other flexible electronic devices.