A5026830384- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Catalytic Cross-Coupling Reactions
- Organic and Molecular Conductors Research
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Crystallography and molecular interactions
- ZnO doping and properties
- Synthesis and properties of polymers
- Advanced Sensor and Energy Harvesting Materials
- Phenothiazines and Benzothiazines Synthesis and Activities
- Optical Wireless Communication Technologies
- Synthesis and Properties of Aromatic Compounds
- Quantum and electron transport phenomena
- Sulfur-Based Synthesis Techniques
- solar cell performance optimization
- Transition Metal Oxide Nanomaterials
- Cyclopropane Reaction Mechanisms
University of Glasgow
2018-2023
University of Strathclyde
2009-2020
Glasgow Life
2014-2020
Institute of Organic Chemistry
2016
Coventry University
2016
University of Oxford
2016
University of St Andrews
2016
International Union of Pure and Applied Chemistry
2009-2014
A new interface engineering method is demonstrated for the preparation of an efficient white organic light-emitting diode (WOLED) by embedding ultrathin layer novel ambipolar red emissive compound 4,4-difluoro-2,6-di(4-hexylthiopen-2-yl)-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene (bThBODIPY) in exciplex formation region. The shows a hole and electron mobility 3.3 × 10-4 2 cm2 V-1 s-1, respectively, at electric fields higher than 5.3 105 V cm-1. resulting WOLED exhibited maximum...
A novel BODIPY-containing organic small molecule is synthesized and employed as a down-converting layer on commercial blue light-emitting diode (LED). The resulting hybrid device demonstrates white-light emission under low-current operation, with color coordinates of (0.34, 0.31) an efficacy 13.6 lm/W; four times greater than the parent LED.
The role of heteratoms in defining the conformation conjugated structures is discussed.
A new triaryl molecule based on a benzene–benzothiadiazole–benzene core has been applied in WOLED device.
Neutral organic electron-donor 7, formally a pyridinylidene carbene dimer, effects reductive cleavage of C-O sigma-bonds in acyloin derivatives Ar(CO)CRR'OX (X = OAc, OPiv, OBz, OMs) and this represents the first by neutral electron-donor. The methodology is applicable to large array substrates reduced counterparts were isolated good excellent yields. For certain substrates, donor 7 behaves as base, effecting condensation reactions with some acetate ester acyloins, leading butenolides....
The first crown-tetracarbene complex of Ni(II) has been prepared, and its crystal structure determined. can be reduced by Na/Hg, with an uptake two electrons. reductively cleaves arenesulfonamides, including those derived from secondary aliphatic amines, effects Birch reduction anthracenes as well reductive cleavage stilbene oxides. Computational studies show that the orbital receives electrons upon 2 is predominantly based on crown carbene ligand also HOMO parent ligand.
The synthesis of novel low band-gap polymers has significantly improved light sensing and harvesting in polymer–fullerene devices. Here the two based on 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY), either bis(3,4-ethylenedioxythiophene) (bis-EDOT) or its all-sulfur analogue bis(3,4-ethylenedithiathiophene) (bis-EDTT) are described. demonstrate ambipolar charge transport shown to be suitable for broadband solar energy solution-processable
Two novel linear oligomers that can be solution-processed to form green organic light-emitting diodes (OLEDs) are reported.
A new terthiophene–diketopyrrolopyrrole (DPP) copolymer has been synthesised in which the central thiophene ring within terthiophene repeat unit is attached to a fused tetrathiafulvalene (TTF). The electrochemical and absorption data of polymer, p(DPP-TTF), are presented, multi-redox states investigated by UV-vis spectroelectrochemistry. Bottom gate/bottom contact field effect transistors were fabricated from films p(DPP-TTF) annealed at 200 °C. material, under these conditions forms fibrous...
p- and n-doped states of thiophene-benzothiadiazole based donor–acceptor π-conjugated polymer materials are studied. Results reveal that mesomeric factors mainly influence p-doping, while steric account for n-doping peculiarities.
Using a simple π-conjugated trimer, EDOT–phenylene–EDOT (EDOT = 3,4-ethylenedioxythiophene), we evaluate the effect that fluorine substituents have upon changes in conformation, conjugation, and oxidation potentials structures. These variations are assessed as function of atom's propensity to feature hydrogen and/or halogen bonding with other heteroatoms. The molecular motif was chosen because EDOT unit presents possibility competing O···X or S···X noncovalent contacts (where X H F). Such...
The synthesis and characterisation of two novel organic down-converting molecules is disclosed, together with their performance as functional colour-converters in combination inorganic blue light-emitting diodes (LEDs).
Anchoring a down-converting chromophore to MOF scaffold enhances the efficiency of resulting hybrid LED by negating aggregation-induced quenching.
Reaction of imidazolylidene-derived enetetramine 2 with aliphatic iodides and bromides (and aryl bearing alkene-containing side-chains in the ortho-position) leads to formation aldehydes through an unprecedented extrusion a one-carbon unit from enetetramine. An intermediate 2-alkylimidazoline 24 is proposed, where alkyl group derives substrate; this imidazoline undergoes further reaction situ afford observed on acidic workup. Modified substrates were designed prepared probe chemistry...
A series of BBT-containing copolymers featuring the 4,8-conjugation pathway is presented and evaluated.
A family of linear oligofluorene-BODIPY structures, containing either a ter- or quaterfluorene unit, have been prepared, in which the attachment oligofluorene chain to BODIPY unit is switched between meso- and beta-positions. Each member this was investigated by UV-vis absorption photoluminescence spectroscopy, cyclic voltammetry thermal studies (TGA DSC) determine their suitability as emissive layers hybrid luminescent devices. One candidate then successfully deployed down converter convert...
Two novel triads based on a diketopyrrolopyrrole (DPP) central core and two 4,4-difluoro-4-bora-3a,4a-diaza- s -indacene (BODIPY) units attached by thiophene rings have been synthesised having high molar extinction coefficients. These were characterised used as donor materials in small molecule, solution processable organic solar cells. Both blended with PC 71 BM an acceptor different ratios wt % their photovoltaic properties studied. For both the modest performance was observed, efficiency...
In this paper, we study a family of solid-state, organic semiconductors for visible light communications. The star-shaped molecules have boron-dipyrromethene (BODIPY) core with range side arm lengths which control the photophysical properties. emit red photoluminescence quantum yields ranging from 22% to 56%. Thin films most promising BODIPY were used as colour converter film enabled conversion modulation bandwidth 73 MHz, is 16 times higher than that typical phosphor in LED lighting...
Complex multi-redox-active organic semiconductors have been made incorporating tetrathiafulvalene as a fused bridge between oligothiophene chains.
We report a study of blends semiconducting polymers as saturated red color converters to replace commercial phosphors in hybrid Light emitting diodes (LEDs) for visible light communication (VLC). By blending two star-shaped organic semiconductor molecules, we found near complete energy transfer (>90% efficiency) from the green-emitting truxene-cored compound T4BT-B red-emitting boron dipyrromethene (BODIPY) cored materials. Furthermore, have demonstrated capability these materials...
White hybrid inorganic/organic light-emitting diodes (LEDs) were fabricated by combining a novel organic colour converter with blue inorganic LED. An small molecule was specifically synthesised to act as down-converter. The characteristics of the white controlled changing concentration based on BODIPY unit, which embedded in transparent matrix, and volume encapsulant mixture. has critical effect conversion efficiency, i.e. how much absorbed light is converted into yellow light. With...
A series of red fluorescent materials (compounds<bold>1–4</bold>), which each contain the symmetric fluorene–thiophene–BT–thiophene–fluorene core, is presented along with their performance in solution-processed OLED devices.