A5027347179- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Liquid Crystal Research Advancements
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Photochemistry and Electron Transfer Studies
- Covalent Organic Framework Applications
- Photoreceptor and optogenetics research
- Photochromic and Fluorescence Chemistry
- Glass properties and applications
- Material Dynamics and Properties
- Synthetic Organic Chemistry Methods
- Supramolecular Chemistry and Complexes
- Flame retardant materials and properties
- Algal biology and biofuel production
- Supercapacitor Materials and Fabrication
- Nonlinear Optical Materials Studies
- Thin-Film Transistor Technologies
- Material Properties and Applications
- Nanofabrication and Lithography Techniques
- Crystallography and molecular interactions
- Photosynthetic Processes and Mechanisms
Université de Montréal
2013-2025
University of Calgary
2018-2024
Calgary Laboratory Services
2018-2020
Département de Chimie Moléculaire
2015-2019
Royal Military College of Canada
2017
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
We demonstrate experimentally for the first time that illumination of azobenzene derivatives leads to changes in molecular environment similar those observed on heating but are highly heterogeneous at submolecular scale. This localized photoplasticization, which can be associated with a free volume gradient, helps understand puzzling phenomenon photoinduced macroscopic material flow and photoexpansion upon far below glass transition temperature (T(g)). The findings stem from correlation...
Herein we study the effects of borane incorporation in a perylene diimide (PDI)-based non-fullerene acceptor (NFA). We have previously demonstrated that PDI-bithiophene-PDI ((PDI)2Th2) compound can be synthesized via direct (hetero)arylation techniques and is easily modified to incorporate phosphole bithiophene core ((PDI)2Th2PO) tune electronic geometric properties. In this work, analogue ((PDI)2Th2B) organoboron moiety heavily influences optical, electronic, To determine functionalization...
Herein, we investigate the role of processing solvent additives on formation polymer–perylene diimide bulk-heterojunction active layers for organic photovoltaics using both spin-coating and slot-die coating methods. We compare effect 1,8-diiodooctane (DIO) diphenyl ether (DPE) as aggregation behavior non-fullerene acceptor, N-annulated perylene dimer (tPDI2N-EH), in neat films blended with benzodithiophene-quinoxaline (BDT-QX, QX-3) donor polymer, processed from toluene air. DIO crystallizes...
Materials design strategies for high open circuit voltage organic photovoltaics.
Organic polymers generally feature 1-dimensional chains or 2-dimensional rings in their backbones since synthetic challenges limit the availability of 3-dimensional monomers. Inorganic cages are less strained and more accessible, offering an alternative route to explore this parameter space. However, only two families─carboranes polyhedral oligomeric silsesquioxanes (POSS)─have been well-studied, revealing materials with valuable mechanical thermal properties. Further exploration frontier...
Herein we report on the first successful coupling of dithienophosphole (S<sub>2</sub>PO) functional building block with three types heteroaryl end caps using direct (hetero)arylation C–H bond functionalization methods.
Herein we report on the synthesis of an N-annulated perylene diimide (PDI) disubstituted thieno[3,4-c]pyrrole-4,6-dione (TPD) molecular acceptor (PDI–TPD–PDI) by direct heteroarylation (DHA) methods. Three sets DHA conditions that explore effects solvent, temperature, and catalyst were employed to find optimal for two PDI–TPD–PDI derivatives. We then selected one use as a non-fullerene in organic solar cell devices with donor polymer PBDB-T. Active layer bulk-heterojunction blends modified...
The alcohol and water-based processing of a perylene diimide (PDI) organic semiconductor into large area solvent resistant films is reported.
Efficient organic photovoltaics (OPVs) based on slot-die-coated (SD) ternary blends were developed for low-intensity indoor light harvesting. For active layers processed in air and from eco-friendly solvents, our device performances (under 1 sun low intensity) are the highest reported values fluoro-dithiophenyl-benzothiadiazole donor polymer-based OPVs. The N-annulated perylene diimide dimer acceptor was incorporated into a blend of polymer (FBT) fullerene (PC61BM) to give bulk...
We debut phosphorus nitrogen cages as a new family of convenient and tunable 3-dimensional connectors for reticular chemistry (crystalline or amorphous).
It has recently been established that physical vapor deposition (PVD) can produce organic glasses with enhanced kinetic stability, high density, and anisotropic packing, the substrate temperature during (Tsubstrate) as key control parameter. The influence of hydrogen bonding on formation PVD not fully explored. Herein, we use a high-throughput preparation method to vapor-deposit three triazine derivatives over wide range Tsubstrate, from 0.69 1.08Tg, where Tg is glass transition temperature....
The byssus that anchors mussels to solid surfaces is a protein-based material combining strength and toughness as well self-healing ability. These exceptional mechanical properties are explained in part by the presence of metal ions forming sacrificial bonds with amino acids. In this study, we show hydrogel films prepared from protein hydrolyzate (BPH) can also be improved following biomimetic formation bonds. Strengthening toughening materials both observed when treating multivalent (Ca2+...
We demonstrate, by screening a library of four derivatives benzodithiophene–quinoxaline (BDT-QX)-based polymer, that BDT-QX are donor polymer candidates for large-scale coating organic photovoltaic (OPV) active layers. Our study shows pairing them with twisted N-annulated perylene diimide (PDI) dimer, which solid-state aggregation can be induced via diphenyl ether (DPE) solvent additive, yields OPV devices power conversion efficiency (PCE) over 5%. The layers, both spin-coated (from...
This study reports the modification of zinc oxide cathodic interlayer with an N-annulated perylene diimide molecule functionalized a carboxylic acid, namely, (HOOC5-triazole) PDIN-hex, referred to as IL-1, for improvement inverted-type organic photovoltaics. The new "IL-1" was synthesized using "click" chemistry and incorporated into photovoltaic device structure solution processing methods. modified layer characterized optical absorption spectroscopy, contact angle measurements, Kelvin...
Installation of chlorine atoms into the ITIC non-fullerene acceptor enables low energy photon harvesting generating high photocurrent in OSCs when paired with PBDB-T. The active layer morphology is greatly influenced by solvent additives.
Abstract The interest in organic solar cells (OSCs) has grown exponentially over the last few years and devices are approaching a symbolic power conversion efficiency (PCE) of 20%. However, many challenges related to scaling‐up several processes must be addressed before this technology can reach production scale. In order facilitate scaled‐up OSCs, synthesis an efficient cost‐effective conjugated polymer, PPDT2FBT, was adapted water‐based method direct (hetero)arylation polymerization...
Mexylaminotriazine derivatives form molecular glasses with outstanding glass-forming ability (GFA), high resistance to crystallization (glass kinetic stability, GS), and a glass transition temperature (Tg) above room that can be conveniently modulated by selection of the headgroup ancillary groups. A common feature all these compounds is their secondary amino linkers, suggesting they play critical role in GFA GS for reasons remain unclear because simultaneously hydrogen (H) bonds lead...
Surface grating decay measurements have been performed on three closely related molecular glasses to study the effect of intermolecular hydrogen bonds surface diffusion. The molecules are derivatives bis(3,5-dimethyl-phenylamino)-1,3,5-triazine and differ only in functional group R at 2-position, with being C2H5, OCH3, NHCH3, referred as "Et", "OMe", "NHMe", respectively. Of molecules, NHMe forms more extensive than Et OMe was found slower For OMe, diffusion is so fast that it replaces...
This contribution explores the direct (hetero)arylation (DHA) cross-coupling of a saddle-like, π-conjugated cyclooctatetrathiophene (Th4) core with N-annulated perylene diimide (PDI) chromophore. Replacing bulky pivalic acid acetic enabled facile cross-coupling, selectively forming PDI tetramer (Th4PDI4) in 70% overall yield. The optoelectronic properties Th4PDI4 were characterized and density functional theory (DFT) was used to calculate optimized molecular geometry orbitals (MOs). Energy...
Mexylaminotriazine derivatives are known to spontaneously form long-lived glassy phases. The role played by various structural elements in their glass formation has been studied, but the effect of substituting both arylamino substituents remains largely unknown. A library 4,6-bis(arylamino)- or 4,6-bis(alkylamino)-1,3,5-triazine with a methylamino ethyl substituent 2-position were synthesized, and glass-forming properties studied. While 3,5-disubstituted aryl motif proved be best among those...
Photosynthetic microorganisms, such as algae, are sources of bioproducts. Because they require only sunlight, water, and carbon dioxide to grow, have potential for future mitigation CO2 emissions. However, inefficient growth these organisms remains an issue realizing emission reductions, primarily in terms photosynthetic efficiency, photoinhibition, photolimitation. Here, we show how use light filtration through semi-transparent films comprised organic π-conjugated molecules photovoltaic...
Irradiation of azomaterials causes various photophysical and photomechanical effects that can be exploited for the preparation functional materials such as surface relief gratings (SRGs). Herein, we develop apply an efficient strategy to optimize SRG inscription process by decoupling, first time, important azo content glass transition temperature (Tg). We prepare blends a photoactive molecular functionalized with Disperse Red 1 (gDR1) series analogous photopassive glasses. Blends 10 40 mol %...