Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

• DOI: 10.1126/science.ade9463
• Publication Date: 2023-05-25T17:58:33Z
• Authors: Chengbin Fei; Nengxu Li; Mengru Wang; Xiaoming Wang; Hangyu Gu; Bo Chen; Zhao Zhang; Zhenyi Ni; Haoyang Jiao; Wenzhan Xu; Zhifang Shi; Yanfa Yan; Jinsong Huang
• Keywords: Aperture (computer memory)

The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance p-i-n structure perovskite solar cells. We report that addition lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb 2+ ), resulting in a reduced amorphous region near passivated surface. minimodule an aperture area 26.9 square centimeters has power conversion efficiency (PCE) 21.8% (stabilized at 21.1%) is certified by National Renewable Energy Laboratory (NREL), which corresponds to minimal small-cell 24.6% 24.1%) throughout module area. Small-area cells large-area minimodules had light soaking stability 3010 2130 hours, respectively, loss 10% from initial value under 1-sun illumination open-circuit voltage conditions.