Synergistic passivation with multi-dentate 2,6-pyridinedicarboxylic acid for high-performance perovskite solar cells

The rare multi-dentate 2,6-pyridinedicarboxylic acid (2,6-PDA) is first applied for passivating the electronic defects in MAPbI 3 film. Consequently, the PCE of the 2,6-PDA-passivated PSC with good stability is increased from 18.14% to 20.57%.