Global ETD Search
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Showing 1 to 8 of 8 for “"MAPbI3"”.
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Vapor Transport Deposition for Perovskite Solar Cells
… growth. Here, we use methylammonium lead iodide (MAPbI3) as an archetype perovskite to identify degradation patterns and determine conditions for high-quality film growth. We show that material degradation during sublimation affects methylammonium iodide precursor powders and their contribution to …
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Transient extreme ultraviolet spectroscopy of semiconductors
… and methylammonium lead iodide perovskite (MAPbI3). Sub-30 fs pulses of XUV light are produced to use as a probe in a tabletop instrument using high-harmonic generation. PbI2 and MAPbI3 both absorb XUV radiation at the iodine N4,5 edge, which arises from transitions from the core I 4d …
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Improving the Environmental Stability of Methylammonium-Based Perovskite Solar Cells
… perovskite material, methylammonium lead iodide (MAPbI3), is environmentally unstable and degrades in the presence of oxygen, light, and moisture. Thus, despite its high initial performance, the degrading performance over time means that the levelized cost of electricity (LCOE) of perovskites is …
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Design and Development of an Accelerated Material Synthesis Platform for Automated Materials Research
… are validated on a methylammonium lead iodide (MAPbI3) and formamidinium lead iodide (FAPbI3) perovskite material system. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and hyperspectral imaging measurements show equivalence between high-throughput synthesis and more …
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Dynamic Crystallization and Stability Engineering in Hybrid Organic-Inorganic Perovskites: Towards Water-Stable and Thermochromic Materials
… and passivation effects on thermochromic MAPbI3 (MA = methyl ammonium) thin films. Systematic variation of MAI:PbI2 ratios revealed that excess MAI is critical for complete reversible transitions between colored and colorless states. Chlorine incorporation from MACl accelerated structure …
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Fabricating and Tailoring Halide Perovskites for Photovoltaic Applications
… films, utilizing methylammonium lead iodide (MAPbI3) as a simplified model system. We then design an improved version of the vapor transport deposition system and transition to the more technologically attractive perovskite composition formamidinium lead iodide (FAPbI3). Learning from previous …
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"“Phonon"" and electron transport in glass-crystal dual materials"
… in CsPbI3, and polar rotor scattering instead in MAPbI3. I also observe “waterfall-like” dispersions, which I show to be an emergent phenomenon due to dynamical averaging of different dispersions that belong to energetically equivalent disordered phases. This work would be of interest to the …
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Dispersive Transport and Drift Mobilities in Methylammonium Lead Iodide Perovskites
<p>Perovskite solar cells (PSCs) have impacted the photovoltaic industry over the past decade with unprecedented boosts in photo-conversion efficiencies. Perovskites’ dramatic rise has been due to borrowed ideas and research from other types of solar cell geometries. The initial surge in perovskite …