Thiazole Functionalized Hole Transport Material Featuring Defect Passivation Effects for High-Performance Perovskite Solar Cells

摘要

Perovskite/hole transport material (HTM) interfaces arerestrainedby the deep-level traps from the perovskite surface defects, whichlead to the nonradiative recombination and impede the carrier transport.It is highly desired to heal these defects by HTMs with comprehensivepassivation ability. Herein, we propose a thiazole-based HTM, termedas TC-36, featuring the simple structured skeleton and low-price syntheticpaths. The versatile thiazole fragment combined with the typical D-pi-A backbone endows the TC-36 with salient defect passivationability, superior hole selection, and appropriate energy level alignmentthat can substantially manipulate the nonradiative recombination andimprove the hole transport process. The perovskite solar cells (PSCs)based on TC-36 generate a champion power conversion efficiency of22.86%, among the best list of PSCs free from the perovskite surfacepassivation pretreatment, and render a respectable long-term stability.

关键词