A5000272206- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Ferroelectric and Piezoelectric Materials
- Chalcogenide Semiconductor Thin Films
- Ga2O3 and related materials
- Metal and Thin Film Mechanics
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Conducting polymers and applications
- Semiconductor Lasers and Optical Devices
Queen Mary University of London
2022-2024
Abstract Reliable fabrication of large‐area perovskite films with antisolvent‐free printing techniques requires high‐volatility solvents, such as 2‐methoxyethanol (2ME), to formulate precursor inks. However, the high‐quality cesium–formamidinium (Cs–FA) perovskites has been hampered using volatile solvents due their poor coordination precursors. Here, this issue is resolved by re‐formulating a 2ME‐based Cs 0.05 FA 0.95 PbI 3 ink pre‐synthesized single crystals instead conventional mixture...
Antisolvent-assisted spin coating has been widely used for fabricating metal halide perovskite films with smooth and compact morphology. However, localized nanoscale inhomogeneities exist in these owing to rapid crystallization, undermining their overall optoelectronic performance. Here, we show that by relaxing the requirement film smoothness, outstanding quality can be obtained simply through a post-annealing grain growth process without passivation agents. The morphological changes,...
BiFeO3 thin films have been widely studied for photoelectrochemical water splitting applications because of its narrow bandgap and good ferroelectricity which can promote the separation photo-generated charges. Bismuth is well known as a volatile element excess bismuth usually added into precursor to compensate loss during heat treatment, but amount required how will affect PEC performance not clearly studied. Herein, self-doped Bi1+x FeO3 are prepared via simple chemical solution deposition...
Piezoresponse force microscopy (PFM) is a robust characterization technique to explore ferroelectric properties at the nanoscale. However, PFM signal can lead misinterpretation of results due dominant electrostatic interaction between tip and sample. In this work, detailed calibration process presented procedure identify parasitic phase offset demonstrated. To obtain artifact-free phase-amplitude loops, methodology developed by combining outcomes from switching spectroscopy-PFM (SS-PFM)...