Efficient Rigid and Flexible Perovskite Solar Cells with Uniform Crystallization and Weak Lattice Vibration via...

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cells (PVSCs) offer promising photovoltaic performance.
• Defects in perovskite materials often limit device efficiency and stability.
• Interface engineering is crucial for optimizing PVSC performance.

Purpose of the Study:

• To develop an efficient and stable passivation strategy for perovskite solar cells.
• To investigate the impact of 1,3-dibromo-1,3,5-triazine-2,4,6-trione hydrochloride on perovskite film quality and device performance.
• To evaluate the operational stability of both rigid and flexible PVSCs.

Main Methods:

• Utilized 1,3-dibromo-1,3,5-triazine-2,4,6-trione hydrochloride for interface molecular passivation.
• Fabricated rigid and flexible perovskite solar cells.
• Characterized perovskite film properties, including crystallinity and lattice structure.
• Assessed device power conversion efficiency (PCE) and operational stability through T90 lifetime measurements.

Main Results:

• Achieved high PCEs of 25.50% for rigid PVSCs and 24.56% for flexible PVSCs.
• Demonstrated improved perovskite film quality with uniform crystallization and reduced lattice shrinkage.
• Flexible PVSCs exhibited a T90 lifetime of 1100 hours, a record for flexible inverted PVSCs.
• Both rigid and flexible devices showed enhanced operational stability.

Conclusions:

• 1,3-dibromo-1,3,5-triazine-2,4,6-trione hydrochloride serves as an effective multifunctional passivation agent.
• The passivation strategy significantly enhances the performance and stability of PVSCs.
• This approach offers valuable insights for the development of high-performance and durable perovskite solar cells.