2020
DOI: 10.1002/admi.202000515
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Correlated Electrical and Chemical Nanoscale Properties in Potassium‐Passivated, Triple‐Cation Perovskite Solar Cells

Abstract: Perovskite semiconductors are an exciting class of materials due to their promising performance outputs in photovoltaic devices. To boost their efficiency further, researchers introduce additives during sample synthesis, such as KI. However, it is not well understood how KI changes the material and, often, leaves precipitants. To fully resolve the role of KI, multiple microscopy techniques are applied and the electrical and chemical behavior of a Reference (untreated) and a KI‐treated perovskite are compared. … Show more

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Cited by 4 publications
(2 citation statements)
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“…Besides doping processing, [ 6 ] the passivation of the perovskite/HTL interface has been carried out successfully by varieties of interfacial engineering methods, such as 2D perovskite layers, [ 7 ] ligand‐based modification, [ 4,8 ] or even inorganic materials. [ 9,10 ]…”
Section: Introductionmentioning
confidence: 99%
“…Besides doping processing, [ 6 ] the passivation of the perovskite/HTL interface has been carried out successfully by varieties of interfacial engineering methods, such as 2D perovskite layers, [ 7 ] ligand‐based modification, [ 4,8 ] or even inorganic materials. [ 9,10 ]…”
Section: Introductionmentioning
confidence: 99%
“…For example, surface potential measurements from KPFM have been correlated with measurements from time‐of‐flight secondary‐ion mass‐spectroscopy (TOF‐SIMS) and atomic force microscope infrared‐spectroscopy (AFM‐IR) to reveal the effects of surface passivation on surface potential in an effort to improve perovskite stability. [ 37 ] Such correlational analyses are complicated by the mismatch of spatial resolutions, which makes direct pixel‐to‐pixel correspondence difficult if not impossible in some cases. Furthermore, the need for separate techniques adds additional time and experimental complexity to the measurements—which in turn adds to the risk of unwanted sample degradation and experimental errors.…”
Section: Introductionmentioning
confidence: 99%