Dopant‐Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules

作者：Liu Cheng; Igci Cansu; Yang Yi; Syzgantseva Olga A.; Syzgantseva Maria A.; Rakstys Kasparas; Kanda Hiroyuki; Shibayama Naoyuki; Ding Bin; Zhang Xianfu; Jankauskas Vygintas; Ding Yong; Dai Songyuan; Dyson Paul J.; Nazeeruddin Mohammad Khaja

来源：Angewandte Chemie, 2021, 133(37): 20652-20660.

DOI：10.1002/ANGE.202107774

• defect passivation
• dopant-free
• hole transport materials
• inorganic perovskites
• perovskite solar cells

The emerging CsPbI3 perovskites are highly efficient and thermally stable materials for wide‐band gap perovskite solar cells (PSCs), but the doped hole transport materials (HTMs) accelerate the undesirable phase transition of CsPbI3 in ambient. Herein, a dopant‐free D‐π‐A type HTM named CI‐TTIN‐2F has been developed which overcomes this problem. The suitable optoelectronic properties and energy‐level alignment endow CI‐TTIN‐2F with excellent charge collection properties. Moreover, CI‐TTIN‐2F provides multisite defect‐healing effects on the defective sites of CsPbI3 surface. Inorganic CsPbI3 PSCs with CI‐TTIN‐2F HTM feature high efficiencies up to 15.9?%, along with 86?% efficiency retention after 1000?h under ambient conditions. Inorganic perovskite solar modules were also fabricated that exhibiting an efficiency of 11.0?% with a record area of 27?cm2. This work confirms that using efficient dopant‐free HTMs is an attractive strategy to stabilize inorganic PSCs for their future scale‐up.(#br)A dopant‐free D‐π‐A type HTM named CI‐TTIN‐2F has been developed which shows excellent charge collection properties and multisite defect‐healing effects. All‐inorganic CsPbI3 PSCs with CI‐TTIN‐2F HTM feature high efficiencies up to 15.9?%, along with 86?% efficiency retention after 1000?h under ambient conditions. All‐inorganic perovskite solar modules were also fabricated that exhibit an efficiency of 11.0?% with a record area of 27?cm2.

• 单位
  华北电力大学; 新能源电力系统国家重点实验室