A5041655917- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- ZnO doping and properties
University of Sheffield
2017-2020
We use ultrasonic spray-coating to fabricate cesium-containing triple-cation perovskite solar cells with a power-conversion efficiency of up 17.8%. Our fabrication route involves brief exposure the partially wet spray-cast films low vacuum, process that is used control film crystallization. show are not vacuum-exposed relatively rough and inhomogeneous, while smooth consist small densely packed crystals. The techniques developed here represent step toward scalable industrially compatible...
Metal-halide perovskites show remarkably clean semiconductor behaviour, as evidenced by their excellent solar cell performance, in spite of the presence many structural and chemical defects. Here, we how this performance sets during earliest phase conversion from metal salts organic-based precursors solvent, using simultaneous situ synchrotron X-ray operando current–voltage measurements on films prepared interdigitated back-contact substrates. These structures function working cells soon...
The development of scalable deposition methods for perovskite solar cell materials is critical to enable the commercialization this nascent technology. Herein, we investigate use and processing nanoparticle SnO2 films as electron transport layers in cells develop ultrasonic spray coating slot-die coating, leading photovoltaic device efficiencies over 19%. effects postprocessing treatments (thermal annealing, UV ozone, O2 plasma) are then probed using structural spectroscopic techniques...
The addition of alkali metal halides to hybrid perovskite materials can significantly impact their crystallisation and hence performance when used in solar cell devices. Previous work on the use potassium iodide (KI) active layers passivate defects triple-cation mixed-halide perovskites has been shown enhance luminescence efficiency reduce current-voltage hysteresis. However, operational stability KI passivated cells under ambient conditions remains largely unexplored. By investigating with...
Abstract Mixed cation perovskites currently achieve very promising efficiency and operational stability when used as the active semiconductor in thin‐film photovoltaic devices. However, an in‐depth understanding of structural photophysical properties that drive this enhanced performance is still lacking. Here prototypical mixed‐cation mixed‐halide perovskite (FAPbI 3 ) 0.85 (MAPbBr 0.15 explored, temperature‐dependent X‐ray diffraction measurements are correlated with steady state...