A5064757158- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Photonic and Optical Devices
- Advanced Fluorescence Microscopy Techniques
- Mechanical and Optical Resonators
- Organic Light-Emitting Diodes Research
University of Sheffield
2022-2025
Abstract Self‐assembled monolayers (SAMs) are becoming widely utilized as hole‐selective layers in high‐performance p‐i‐n architecture perovskite solar cells. Ultrasonic spray coating and airbrush demonstrated here effective methods to deposit MeO‐2PACz; a carbazole‐based SAM. Potential dewetting of hybrid precursor solutions from this layer is overcome using optimized solvent rinsing protocols. The use air‐knife gas‐quenching then explored rapidly remove the volatile an MAPbI 3 film...
Abstract High temperature post‐deposition annealing of hybrid lead halide perovskite thin films—typically lasting at least 10 min—dramatically limits the maximum roll‐to‐roll coating speed, which determines solar module manufacturing costs. While several approaches for “annealing‐free” cells (PSCs) have been demonstrated, many are limited feasibility scalable fabrication. Here, this work has solvent‐engineered a high vapor pressure solvent mixture 2‐methoxy ethanol and tetrahydrofuran to...
We fabricate a type of back-contact perovskite solar cell based on 1.5 μm-width grooves that are embossed into plastic film whose opposing "walls" selectively coated with either n- or p-type contacts. A precursor solution is then deposited the grooves, creating individual photovoltaic devices. Each groove device series-connected to its neighbors, minimodules consisting hundreds connected grooves. Here, we report fabrication groove-based devices using slot-die coating deposit and explore...
Spray coating is an industrially mature technique used to deposit thin films that combines high throughput with the ability coat nonplanar surfaces. Here, we explore use of ultrasonic spray fabricate perovskite solar cells (PSCs) over rigid, surfaces without problems caused by solution dewetting and subsequent "run-off". Encouragingly, find PSCs can be spray-coated using our processes onto glass substrates held at angles inclination up 45° away from horizontal, such devices having comparable...
Defect management in perovskite solar cells (PSCs) via surface passivation has become a cornerstone maximizing both stability and solar‐to‐electrical power conversion efficiency (PCE) of devices by reducing defect densities and/or improving energetic alignment between the charge‐transporting layers. Despite this, few reports explore use roll‐to‐roll compatible technologies to deposit such interfacial treatments, limiting applicability real‐world contexts. In this work, iso‐butylammonium...
An alumina interlayer is developed to facilitate state-of-the-art spray coated perovskite photovoltaics. This enables deposition onto the Me4PACz self-assembled monolayer (SAMs) resulting in power conversion efficiencies >20%.
Integrating photovoltaic devices onto the surface of carbon-fiber-reinforced polymer substrates should create materials with high mechanical strength that are also able to generate electrical power. Such anticipated find ready applications as structural, energy-harvesting systems in both automotive and aeronautical sectors. Here, fabrication triple-cation perovskite n-i-p solar cells planarized is demonstrated, utilizing a transparent top ITO contact. These contain "wrinkled" SiO
This study uses a laser patterning setup to write defect structures into conjugated polymer microcavity. We show that the enhances optical confinement and reduces lasing threshold.
Perovskite Solar Cells In article number 2300814, Ramadan, Lidzey, and co-workers used ultra-sonic spray coating to passivate spray-cast CsFAbI3 perovskite solar cells using iso-butylammonium bromide. This process created a quasi-2D surface-layer increased device open circuit voltage by 80 mV. Devices fabricated in this manner demonstrate power conversion efficiencies of up 21.0%, with work representing the first demonstration spray-coated surface passivation treatment that is compatible...
Self-Assembled Monolayers Carbazole-based self-assembled monolayers are becoming a dominant hole-transporting layer in p-i-n perovskite solar cells, combining stability, efficiency, and low-cost. In article number 2104848 by David G. Lidzey co-workers, spray coating airbrush pen of MeO-2PACz is used to fabricate high-quality transport layers. This combined with gas-quenched spray-coated layers, realize cells power conversion efficiencies excess 20%.