2019/10/16 by Jonas Diekmann, Pietro Caprioglio, Diekmann, Jonas +29
Engineering · Materials Science · #Applied Physics (physics.app-ph) #Chalcogenide Semiconductor Thin Films #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Perovskite Materials and Applications #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.48550/arxiv.1910.07422
openalex publication_date 2019/10/16 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Perovskite semiconductors have demonstrated outstanding external luminescence\nquantum yields, enabling high power conversion efficiencies (PCE). However, the\nprecise conditions to advance to an efficiency regime above monocrystalline\nsilicon cells are not well understood. Here, we establish a simulation model\nthat well describes efficient p-i-n type perovskite solar cells and a range of\ndifferent experiments. We then study important device and material parameters\nand we find that an efficiency regime of 30% can be unlocked by optimizing the\nbuilt-in potential across the perovskite layer by using either highly doped\n(1019 cm-3), thick transport layers (TLs) or ultrathin undoped TLs, e.g.\nself-assembled monolayers. Importantly, we only consider parameters that have\nbeen already demonstrated in recent literature, that is a bulk lifetime of 10\nus, interfacial recombination velocities of 10 cm/s, a perovskite bandgap of\n1.5 eV and an EQE of 95%. A maximum efficiency of 31% is predicted for a\nbandgap of 1.4 eV. Finally, we demonstrate that the relatively high mobile ion\ndensity does not represent a significant barrier to reach this efficiency\nregime. Thus, the results of this paper promise continuous PCE improvements\nuntil perovskites may become the most efficient single-junction solar cell\ntechnology in the near future.\n