Superoxide radical derived metal-free spiro-OMeTAD for highly stable perovskite solar cells.

ABSTRACT: Lithium salt-doped spiro-OMeTAD is widely used as a hole-transport layer (HTL) for high-efficiency n-i-p perovskite solar cells (PSCs), but unfortunately facing awkward instability for commercialization arising from the intrinsic Li⁺ migration and hygroscopicity. We herein demonstrate a superoxide radicals (•O₂^-) derived HTL of metal-free spiro-OMeTAD with remarkable capability of avoiding the conventional tedious oxidation treatment in air for highly stable PSCs. Present work explores the employing of variant-valence Eu(TFSI)₂ salts that could generate •O₂^- for facile and adequate pre-oxidation of spiro-OMeTAD, resulting in the HTL with dramatically increased conductivity and work function. Comparing to devices adopting HTL

SUBMITTER: Ye L 

PROVIDER: S-EPMC11387419 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature