A5008684160- Perovskite Materials and Applications
- Conducting polymers and applications
- Luminescence Properties of Advanced Materials
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Glass properties and applications
- Gas Sensing Nanomaterials and Sensors
- MXene and MAX Phase Materials
- Dielectric materials and actuators
- Electronic and Structural Properties of Oxides
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
- Advanced Photocatalysis Techniques
- Graphene research and applications
- 2D Materials and Applications
- ZnO doping and properties
- Carbon and Quantum Dots Applications
- Advanced Sensor and Energy Harvesting Materials
- Lanthanide and Transition Metal Complexes
- Microwave Dielectric Ceramics Synthesis
- Radiation Detection and Scintillator Technologies
- Luminescence and Fluorescent Materials
- Ferroelectric and Piezoelectric Materials
- Organic Light-Emitting Diodes Research
University of Waterloo
2019-2024
Indian Institute of Science Bangalore
2018-2019
Regional Municipality of Waterloo
2019
National Institute for Nanotechnology
2019
Solid State Physics Laboratory
2018
Centre for Materials for Electronics Technology
1999
Fluoride capping prevents the oxidation product from inhibiting CeO<sub>2</sub> nanozyme, and increases oxygen vacancy concentration for more efficient catalysis.
Applications of self-driven optoelectronic devices based on a wide array organolead halide perovskites.
A commodity-scale polymer is used for controlling the nucleation and growth of single crystals organolead halide perovskite. The [polystyrene (PS)] cross-links strongly interacts with PbI2 MAI (MAPbI3 perovskite precursors) resulting in control crystallization process. PS concentration modulates time, crystal size, number crystals. In addition, PS-based MAPbI3 show an enhanced performance as well improved thermal environmental stability. Specifically, PS-MAPbI3 3 times higher photocurrent...
The integration of polymer chains with organolead halide perovskite (MAPbI3) films, leading to enhanced stability and electro-optical performance, is critically affected by the molecular weight chains. determines mobility volume chains, which affects crystallization kinetics and, hence, grain size. insulating nature another critical factor that both ion migration conduction electronic charge. combined effect these factors leads optimal performance use medium-length A simple model integrating...
Abstract The field of halide perovskites has advanced significantly within a decade, as engineering strategies are addressing many the challenges and result improved environmental stability electro‐optical properties have been achieved. use copolymer additive strategy received significant attention in recent years variety polymers with differences such water affinity, polarity, elastic modulus, ion conductivity basis for interaction perovskite can be selected combined perovskite. As result,...
In this study, the internal and external stabilities of a p–i–n methylammonium lead iodide perovskite solar cell (PSC) are improved. Polystyrene (PS) is introduced into layer to form cross‐linked polymer–perovskite network, which enhances nucleation growth grains. Moreover, for first time, 60 nm thick ZnO/AlO x nanolaminate (NL) thin‐film encapsulation (TFE) deposited directly on PSC using an atmospheric‐pressure (AP) spatial atomic deposition system operated in AP chemical vapor (AP–SCVD)...
The rigid and brittle nature of methylammonium lead iodide (MAPbI3) polycrystalline films limits their application in stretchable devices due to rapid deterioration performance on cycling. By incorporation polymer chains the MAPbI3 films, a strategy alter mechanical modulus viscoelastic has been developed. Combining this with flexible nanochain electrodes, highly stable perovskite have fabricated. resultant polymer-MAPbI3 photodetector exhibits ultralow dark currents (∼10-11 A) high light...
The polymer additive strategy provides a facile and cost-effective way for passivating defects trap sites at the grain boundaries interfaces acting as barrier against external degradation factors in perovskite-based devices. However, limited literature exists discussing integration of hydrophobic hydrophilic additives form copolymer within perovskite films. inherent difference chemical structure these polymers their interaction with components environment leads to critical differences...
Organometal halide perovskite (OHP) composites are flexible and easy to synthesize, making them ideal for ambient mechanical energy harvesting. Yet, the output current density from piezoelectric nanogenerators (PENGs) remains orders of magnitude lower than their ceramic counterparts. In prior composites, high permittivity nanoparticles enhance dielectric constant (ϵr) but reduce strength (Eb). This guides our design: increase by ϵr nanoparticle while enhancing Eb optimizing structure....
Carbon monoxide interacts strongly with the MAPbI 3 film surface and can displace adsorbed O 2 leading to loss of organic moiety, accompanied by lowering work function softening perovskite due formation PbI .
Van der Waals heterostructures formed by stacking different atomically thin layered materials have emerged as the sought-after device platform for electronic and optoelectronic applications. Determining spatial extent of all encapsulated components in such vertical stacks is key to optimal fabrication methods improved performance. Here we employ electrostatic force microscopy a fast non-invasive microscopic probe that provides compelling images two dimensional layers buried over 30 nm below...
Dicyanobenzene (DCB), a weak Lewis base, effectively passivates perovskite films by eliminating residual PbI 2 , enhancing crystallinity, and reducing trap state density, thus solar cell performance stability.