Dopant-additive synergism enhances perovskite solar modules

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cells (PSCs) show great potential due to excellent optoelectronic properties.
• Commercialization of large-area PSCs is hindered by lower efficiency, poor stability, and reproducibility issues compared to lab-scale devices.
• Addressing these challenges is crucial for advancing perovskite photovoltaic technology.

Purpose of the Study:

• To develop a synergistic dopant-additive strategy for improving large-area perovskite solar modules (PSMs).
• To overcome the limitations of efficiency, stability, and reproducibility in perovskite solar technology.
• To enable the commercialization of high-performance, large-area perovskite photovoltaics.

Main Methods:

• Employed a synergistic dopant-additive combination strategy using methylammonium chloride (MACl) as the dopant.
• Incorporated a Lewis-basic ionic-liquid additive, 1,3-bis(cyanomethyl)imidazolium chloride ([Bcmim]Cl).
• Investigated the interaction between [Bcmim]Cl and MACl to understand the mechanism of property enhancement.

Main Results:

• Achieved a certified efficiency of 23.30% for perovskite solar modules (PSMs) with a 27.22 cm² aperture area, stabilizing at 22.97%.
• Demonstrated long-term operational stability, retaining 94.66% of initial efficiency after 1,000 hours of continuous one-sun illumination.
• Produced phase-homogeneous, stable perovskite films with high crystallinity and reduced defects by inhibiting precursor solution degradation and MACl aggregation.

Conclusions:

• The synergistic dopant-additive strategy effectively enhances the performance and stability of large-area perovskite solar modules.
• This approach successfully addresses key drawbacks hindering the commercialization of perovskite photovoltaics.
• The findings represent a significant step towards bridging the gap between laboratory research and industrial production of perovskite solar technology.