A non-ionic fluorinated p-dopant enables the construction of efficient and stable perovskite solar cells.

ABSTRACT: The Li-TFSI/t-BP system is essential for doping the hole-transporting layer (HTL) to construct efficient perovskite solar cells (PSCs). However, the hygroscopicity and Li⁺ migration of Li-TFSI, as well as the corrosiveness and volatility of t-BP, can have negative impacts on the efficiency and stability of PSCs. Herein, a novel non-ionic fluorinated p-dopant 1-[bis(trifluoromethanesulfonyl)methyl]-2,3,4,5,6-pentafluorobenzene (PFB-TFSI) is developed to replace the Li-TFSI/t-BP system. The non-ionic structure of PFB-TFSI allows it to dissolve in chlorobenzene without t-BP. Moreover, due to the lower HOMO level of PFB-TFSI, it can directly oxidize PTAA to generate [PTAA]⁺ radical cations without post-treatment, achieving effective doping of P

SUBMITTER: Wan Z 

PROVIDER: S-EPMC12356144 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature