A5024533022- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Luminescence and Fluorescent Materials
- Nanomaterials and Printing Technologies
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Polymer composites and self-healing
- Ferroelectric and Piezoelectric Materials
- Neuroscience and Neural Engineering
- Cellular Mechanics and Interactions
- Molecular Junctions and Nanostructures
- Spectroscopy and Laser Applications
- 3D Printing in Biomedical Research
- Natural Fiber Reinforced Composites
- Mechatronics Education and Applications
- Nanotechnology research and applications
- Optical properties and cooling technologies in crystalline materials
- Acoustic Wave Resonator Technologies
National Chemical Laboratory
2014-2022
University of Cambridge
2018-2019
Politecnico di Milano
2017-2019
Center for Nano Science and Technology
2017-2019
Italian Institute of Technology
2017-2019
Jawaharlal Nehru Centre for Advanced Scientific Research
2011-2017
Council of Scientific and Industrial Research
2014-2017
National Institute for Interdisciplinary Science and Technology
2014-2016
National Institute of Solar Energy
2014
We have achieved high-efficiency polycrystalline perovskite light-emitting diodes (PeLEDs) based on formamidinium (FA) and cesium (Cs) mixed cations without quantum dot synthesis. Uniform single-phase FA1–xCsxPbBr3 films were fabricated by one-step formation with various FA:Cs molar proportions; then the influences of chemical composition film morphology, crystal structure, photoluminescence (PL), electroluminescence (EL) systematically investigated. Incorporation Cs+ in FAPbBr3...
Abstract Ruddlesden–Popper phase (RP‐phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light‐emitting diodes (LEDs). The critical limitation LED applications is the insulating OA arranged in a preferred orientation limits charge transport. Therefore, ideal solution to achieve randomly connected structure can improve transport without hampering confinement electron–hole pair. Here, structurally modulated RP‐phase metal halide...
Low band gap perovskites, such as mixed Pb–Sn systems, are essential to make bottom cells in all perovskite tandem photovoltaics. However, currently the fundamental dynamics of carriers these materials not well explored. Here we use ultrafast broad-band pump–probe spectroscopy probe two-stage carrier cooling CH3NH3Pb1–xSnxI3 perovskites and show that is slower than pure Pb systems. The first-stage associated with Fröhlich interactions between metal–iodide bonds slow down monotonically...
We report the changes in surface electrical resistance, R, of conducting polymer, Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) films coated on appropriate flexible substrates stretched conditions. These studies are important context organic electronic applications. In situ conductivity measurements pristine PEDOT:PSS thin elastomeric upon stretching reveal a minima R as function strain, x, prior to expected increase at higher strain levels. The emphasize (i) role...
Electrically conducting polymers are prospective candidates as active substrates for the development of neuroprosthetic devices. The utility these promoting differentiation embryonic stem cells paves viable routes regenerative medicine. Here, we have tuned electrical and mechanical cues provided to during by precisely straining polymer (CP) coated, elastomeric-substrate. Upon substrates, neural pattern occurs in form aggregates, accompanied a gradient where substrate interface reveals higher...
With recent progress in flexible electronics, developing facile one-step techniques for fabricating stretchable conductors and interconnects remain essential. It is also desirable these processes to have a small number of processing steps, incorporate micropatterning, be capable being effortlessly implemented manufacturing wearable logic circuits. A low vacuum flash evaporation Au nanoclusters proposed as method fabricate highly fulfilling all such requirements. High metal-elastomer adhesion...
A propeller type donor imparts organic solubility to oligoethylene glycol substituted conjugated small molecules. The facilitates better intermolecular contacts and improved field effect transistor efficiency.
In article number 1901225, Tae-Woo Lee and co-workers suggest a strategy to improve the electroluminescence efficiency of Ruddlesden–Popper (RP) phase perovskite light-emitting diodes by introducing structurally modulated RP-phase emitters, which can charge transport ability without hampering confinement electron-hole pair. The randomly oriented forces contact between inorganic layers thereby improves radiative recombination.
Summary form only given. Lead halide perovskite semiconductors have recently gained interest for their application in a wide range of different optoelectronic devices, demonstrating impressive performances solid-state photovoltaic devices [1] with efficiencies exceeding 20% and great potential lighting lasing [2,3]. These materials not show exceptional primary properties such as direct bandgap,[4] small exciton binding energy,[5] low carrier recombination rates,[6] ambipolar transport,[7]...
Aligned nanocrystals of organic semiconductors (OSCs) are highly desirable for electronic devices and biomedical photonic applications. Solution-based wet processing routes have the potential to produce aligned over large areas in small time frames. Herein, we demonstrate that by optimizing hydrodynamic evaporative processes, controlled long-range crystalline assemblies OSCs can be achieved (longest nanocrystal ∼3 mm) purely through physical processes: namely, from fingering instabilities....