Bifacial Perovskite Solar Cells by Lamination Approach With a PEDOT:PSS/d-Sorbitol Blended Adhesion Layer

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Bifacial perovskite solar cells (PSCs) offer enhanced power generation by utilizing light from both sides.
• Traditional lamination methods often employ insulating layers that can negatively impact device performance due to degradation and increased resistance.
• Developing efficient and low-impact lamination techniques is crucial for advancing PSC technology.

Purpose of the Study:

• To introduce an efficient low-temperature and low-pressure lamination method for bifacial PSCs.
• To enhance the conductivity and uniformity of the interconnection layer in laminated bifacial PSCs (LBPs).
• To improve the overall power conversion efficiency of bifacial PSCs.

Main Methods:

• Utilizing a conductive adhesive layer composed of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) blended with d-sorbitol.
• Incorporating d-sorbitol to provide adhesive properties and facilitate substrate lamination.
• Investigating the role of hydrogen bonding between d-sorbitol and PSS in improving PEDOT chain packing and conductivity.

Main Results:

• The d-sorbitol/PEDOT:PSS blend enhances conductivity and surface uniformity of the adhesive layer.
• The conductive adhesion layer enables intimate interconnection between laminated components in bifacial PSCs.
• The optimized LBP achieved a power conversion efficiency of 19.17% under 1-sun and 27.54% with 0.5 albedo.

Conclusions:

• The developed lamination strategy effectively fabricates efficient bifacial PSCs under mild conditions.
• This approach mitigates performance losses associated with conventional lamination techniques.
• The study presents a viable pathway for scalable and high-performance bifacial PSC manufacturing.