Halide homogenization for low energy loss in 2-eV-bandgap perovskites and increased efficiency in all-perovskite triple-junction solar cells
Nature Energy Springer Nature 9:1 (2023) 70-80
Abstract:
Monolithic all-perovskite triple-junction solar cells have the potential to deliver power conversion efficiencies beyond those of state-of-art double-junction tandems and well beyond the detailed-balance limit for single junctions. Today, however, their performance is limited by large deficits in open-circuit voltage and unfulfilled potential in both short-circuit current density and fill factor in the wide-bandgap perovskite sub cell. Here we find that halide heterogeneity—present even immediately following materials synthesis—plays a key role in interfacial non-radiative recombination and collection efficiency losses under prolonged illumination for Br-rich perovskites. We find that a diammonium halide salt, propane-1,3-diammonium iodide, introduced during film fabrication, improves halide homogenization in Br-rich perovskites, leading to enhanced operating stability and a record open-circuit voltage of 1.44 V in an inverted (p–i–n) device; ~86% of the detailed-balance limit for a bandgap of 1.97 eV. The efficient wide-bandgap sub cell enables the fabrication of monolithic all-perovskite triple-junction solar cells with an open-circuit voltage of 3.33 V and a champion PCE of 25.1% (23.87% certified quasi-steady-state efficiency).Small molecule dopant-free dual hole transporting material for conventional and inverted perovskite solar cells
Materials Chemistry Frontiers Royal Society of Chemistry (RSC) 7:18 (2023) 4019-4028
Publisher Correction: Regulating surface potential maximizes voltage in all-perovskite tandems
Nature Springer Nature 620:7973 (2023) e15-e15
Suppressed phase segregation for triple-junction perovskite solar cells
Nature Springer Nature 618:7963 (2023) 74-79
Optical Simulation-Aided Design and Engineering of Monolithic Perovskite/Silicon Tandem Solar Cells
ACS Applied Energy Materials American Chemical Society (ACS) 6:10 (2023) 5217-5229