Scientists use multi-additive technique to enhance performance and stability in upside down perovskite solar cells

• Scientists at University of Rome "Tor Vergata"'s CHOSE (Centre for Hybrid and also Organic Solar Energy), Greatcell Italy, ISM-CNR and also ENEA have actually researched a standard three-way cation perovskite (∼ 1.58 eV) as well as broader bandgap perovskite (∼ 1.63 eV) with intent of discovering a common approach to construct a durable gadget stable gradually independently of the perovskite used.

The researchers utilized a combination of additives inside the perovskite ink: ionic liquid 1-Butyl-3 methylimidazolium tetrafluoroborate (BMIM-BF4), alkylamine ligands oleylamine (OAm) as well as benzylhydrazine hydrochloride (BHC). The recent job discloses that the mix of these ingredients assists to boost the performance and also stability of the entire device, reaching a power conversion performance as much as 21.3% and over 20% for both sorts of perovskite and also stability past 1000 h under continual light soaking.

The universal applicability of this approach was further put on a robust methylammonium cost-free perovskite, leading to a remarkable stability both under light soaking and under 85 ° C, revealing T90 > 1500 h and T80 > 8658 h, specifically: the solar cells changed with the additive combination preserved 95 % of their efficiency after 1000 h under light soaking at 45 ° C as well as 100 % of their efficiency after 1500 h of stress at 85 ° C.

The choice of BMIMBF4, OAm, and BHC as perovskite ingredients is driven by the different means these ingredients enhance the quality of the perovskite absorber when they are contributed to the perovskite ink. By acting upon various elements of the tool passivation, the team revealed it possible to integrate them to attain a step-by-step renovation of the gadget efficiency.