Dual passivation of the crystal lattice and grain boundaries achieves highly efficient carbon-based CsPbI2Br perovskite solar cells

Key Points

• Efficiency of carbon-based perovskite solar cells significantly improves with dual passivation of the crystal lattice and grain boundaries.
• A notable increase in power conversion efficiency to 21.5% showcases the effectiveness of the dual passivation method.
• Observational analysis shows the enhancements in solar cell performance led to substantial decreases in charge recombination.
• These findings highlight the potential for dual passivation techniques in advancing solar cell technology, with further exploration needed for commercial applications.