A5009037941- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Ferroelectric and Piezoelectric Materials
- Organic Light-Emitting Diodes Research
Applied Physical Sciences (United States)
2019-2022
University of North Carolina at Chapel Hill
2022
University of Nebraska–Lincoln
2018-2020
The power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are already higher than that other thin film technologies, but laboratory cell-fabrication methods not scalable. Here, we report an additive strategy to enhance the efficiency and stability PSCs made by scalable blading. Blade-coated incorporating bilateral alkylamine (BAA) additives achieve PCEs 21.5 (aperture, 0.08 cm2) 20.0% 1.1 cm2), with a record-small open-circuit voltage deficit 0.35 V under AM1.5G illumination....
Ravishankar et al. claimed the drive-level capacitance profiling (DLCP) method cannot resolve trap density along depth direction in perovskites with given thickness, and explained measured charges to be a consequence of geometrical diffusion capacitance. We point out that densities DLCP are derived from differential at different frequencies, thus background caused by geometry has been subtracted. Even for non-differential doping analysis DLCP, contribution is shown negligible excluded....
Abstract Solar‐grade single or multiple crystalline wafers are needed in large quantities the solar cell industry, and generally formed by a top‐down process from crystal ingots, which causes significant waste of materials energy during slicing, polishing, other processing. Here, bottom‐up technique that allows growth wafer‐size hybrid perovskite crystals directly aqueous solution is reported. Single‐crystalline with centimeter size grown at top surface precursor solution. As well as saving...
Stabilizing perovskite solar cells requires consideration of all defective sites in the devices. Substantial efforts have been devoted to interfaces, while stabilization grain boundaries received less attention. Here, we report on a molecule tributyl(methyl)phosphonium iodide (TPI), which can convert into wide bandgap one-dimensional (1D) that is mechanically robust and water insoluble. Mixing TPI with precursor results wrapping grains both surfaces converted several nanometer-thick 1D...
Grain boundaries have been established to impact charge transport, recombination and thus the power conversion efficiency of metal halide perovskite thin film solar cells. As a special category grain boundaries, ferroelastic twin recently discovered exist in both CH3NH3PbI3 films single crystals. However, their on carrier transport perovskites remains unexplored. Here, using scanning photocurrent microscopy, we find that negligible influence across them. Photoluminescence (PL) imaging...