Substituted lead halide perovskite intermediate band absorbers

Patent · Tue Oct 01 00:00:00 EDT 2019

OSTI ID:1576245

Sampson, Matthew D.; Chan, Maria K.; Martinson, Alex B.

Lead halide perovskites have proven to be a versatile class of visible light absorbers that allow rapid access to the long minority carrier lifetimes and diffusion lengths desirable for traditional single-junction photovoltaics. Computational screening identified both Fe- and Co-substituted MAPbBr3 as promising intermediate band candidate materials, and the later films were synthesized via conventional solution-based processing techniques. First-principles density functional theory (DFT) calculations support the existence of intermediate bands upon Co incorporation and enhanced sub-gap absorption, which are confirmed by UV-visible-NIR absorption spectroscopy. The simple tenability combined with steady state and time-resolved PL studies that reveal no sign of self-quenching suggest this class of materials to be promising for intermediate band photovoltaics.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357; W-31-109-ENG-38
• Assignee: UChicago Argonne, LLC (Chicago, IL)
• Patent Number(s): 10,428,100
• Application Number: 15/406,419
• OSTI ID: 1576245
• Resource Relation: Patent File Date: 2017 Jan 13
• Country of Publication: United States
• Language: English