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Themed collection Functional Organic Materials for Optoelectronic Applications

23 items
Editorial

Functional Organic Materials for Optoelectronic Applications

Guest Editors Graeme Cooke, Ivana Evans and Peter Skabara introduce this themed collection on functional organic materials for optoelectronic applications, in celebration of Professor Martin Bryce’s contributions to this field.

Graphical abstract: Functional Organic Materials for Optoelectronic Applications
Open Access Accepted Manuscript - Paper

Ortho substituted 1,3,5-Triphenylbenzene hole transport materials for perovskite solar cells

Paper

Tailoring exciton diffusion and domain size in photovoltaic small molecules by annealing

Annealing is shown to increase both exciton diffusion and domain size in two organic photovoltaic materials. This enables both efficient light harvesting and efficient charge extraction.

Graphical abstract: Tailoring exciton diffusion and domain size in photovoltaic small molecules by annealing
Open Access Paper

The influence of molecular geometry on the efficiency of thermally activated delayed fluorescence

We report a strategy for positively influencing the conformation of thermally activated delayed fluorescence (TADF) molecules containing phenothiazine and dibenzothiophene-S,S-dioxide units.

Graphical abstract: The influence of molecular geometry on the efficiency of thermally activated delayed fluorescence
Paper

Enhanced thermally activated delayed fluorescence through bridge modification in sulfone-based emitters employed in deep blue organic light-emitting diodes

Two thermally activated delayed fluorescence (TADF) emitters bearing a new dipyridylsulfone core as the electron-accepting unit and di-tert-butyl carbazoles as electron-donating units are reported.

Graphical abstract: Enhanced thermally activated delayed fluorescence through bridge modification in sulfone-based emitters employed in deep blue organic light-emitting diodes
Paper

Saddle-like, π-conjugated, cyclooctatetrathiophene-based, hole-transporting material for perovskite solar cells

A new HTM incorporating a saddle-like, thiophene-rich core endowed with four triphenylamine units is proposed. The new HTM leads to PSCs reaching efficiencies up to 16.3%.

Graphical abstract: Saddle-like, π-conjugated, cyclooctatetrathiophene-based, hole-transporting material for perovskite solar cells
Paper

Assembly effect on the charge carrier mobility in quaterthiophene-based n/p-materials

Effect of the peptide-based quaterthiophene self-assembly process on the charge mobility properties of the n/p-materials formed is studied.

Graphical abstract: Assembly effect on the charge carrier mobility in quaterthiophene-based n/p-materials
Paper

Minimizing geminate recombination losses in small-molecule-based organic solar cells

Geminate recombination rates are successfully predicted for series of small-molecule bulk heterojunction solar cells applying the Marcus–Levich–Jortner equation.

Graphical abstract: Minimizing geminate recombination losses in small-molecule-based organic solar cells
Paper

A versatile star-shaped organic semiconductor based on benzodithiophene and diketopyrrolopyrrole

A novel star-shaped π-conjugated oligomer containing a benzodithiophene core and four diketopyrrolopyrrole arms is reported.

Graphical abstract: A versatile star-shaped organic semiconductor based on benzodithiophene and diketopyrrolopyrrole
Paper

New routes to organometallic molecular junctions via a simple thermal processing protocol

Gold nanoparticle capped organometallic molecular junctions are prepared from a single source precursor by simple self-assembly and mild thermolysis.

Graphical abstract: New routes to organometallic molecular junctions via a simple thermal processing protocol
Paper

Thermally activated delayed fluorescence vs. room temperature phosphorescence by conformation control of organic single molecules

The time-resolved photophysical analysis of a multi-color-changing mechanochromic luminescent compound has been disclosed, which reveals distinct different emission paths to boost TADF and RTP of the emitter depending on its molecular conformations.

Graphical abstract: Thermally activated delayed fluorescence vs. room temperature phosphorescence by conformation control of organic single molecules
Paper

Naphthyridine-based emitters simultaneously exhibiting thermally activated delayed fluorescence and aggregation-induced emission for highly efficient non-doped fluorescent OLEDs

Two naphthyridine-based emitters are demonstrated to be TADF and AIE emitters to afford superior EL efficiencies in non-doped OLEDs.

Graphical abstract: Naphthyridine-based emitters simultaneously exhibiting thermally activated delayed fluorescence and aggregation-induced emission for highly efficient non-doped fluorescent OLEDs
Paper

Homoleptic platinum(II) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs

Two new homoleptic platinum(II) complexes are reported that feature aryl-appended 5-(2-pyridyl)-1,2,4-triazole chelates acting as N^N ligating ions, PtL12 and PtL22. They have been used to prepare high-efficiency OLEDs, in which unimolecular and bimolecular excited states contribute green and red emission respectively.

Graphical abstract: Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs
Open Access Paper

Tetrathiafulvalene–oligofluorene star-shaped systems: new semiconductor materials for fluorescent moisture indicators

Increased emission through the oxidation of tetrathiafulvalene redox-active centres in star-shaped oligofluorene structures.

Graphical abstract: Tetrathiafulvalene–oligofluorene star-shaped systems: new semiconductor materials for fluorescent moisture indicators
Open Access Paper

Single-molecule conductance oscillations in alkane rings

We investigate the single-molecule electrical conductance of alkane rings connected to gold electrodes and demonstrate that their logarithmic conductances are ocillatory functions of length.

Graphical abstract: Single-molecule conductance oscillations in alkane rings
Paper

Almost complete radiationless energy transfer from excited triplet state of a dim phosphor to a covalently linked adjacent fluorescent dye in purely organic tandem luminophores doped into PVA matrix

Efficient harvesting of energy of the triplet exited state of dim organic phosphors by conjugated fluorophores is a general phenomenon that would be applicable for construction of novel photoluminescence-based sensors and organic light emitting devices.

Graphical abstract: Almost complete radiationless energy transfer from excited triplet state of a dim phosphor to a covalently linked adjacent fluorescent dye in purely organic tandem luminophores doped into PVA matrix
Paper

Capturing the interplay between spin–orbit coupling and non-Condon effects on the photoabsorption spectra of Ru and Os dyes

A theoretical protocol developed to study the low-energy tail of the absorption spectrum of homoleptic biscyclometalated ruthenium and osmium complexes.

Graphical abstract: Capturing the interplay between spin–orbit coupling and non-Condon effects on the photoabsorption spectra of Ru and Os dyes
Paper

Air stable high-spin blatter diradicals: non-Kekulé versus Kekulé structures

1,2,4-Benzotriazinyl based stable diradicals possess singlet ground states and small singlet–triplet energy gaps with a thermal accessible triplet excited state.

Graphical abstract: Air stable high-spin blatter diradicals: non-Kekulé versus Kekulé structures
Paper

Exploiting synergy between ligand design and counterion interactions to boost room temperature phosphorescence from Cu(I) compounds

Turn it up! Inter-ion interactions and ligand design can synergistically boost emission from Cu(I) complexes, tuning from orange to yellow.

Graphical abstract: Exploiting synergy between ligand design and counterion interactions to boost room temperature phosphorescence from Cu(i) compounds
Paper

Tuning the electronic properties and the planarity degree in the π-extended TTF series: the prominent role of heteroatoms

A combined experimental and theoretical study demonstrates the critical role of intramolecular S⋯S interactions in dictating the planar conformation of an extended tetrathiafulvalene.

Graphical abstract: Tuning the electronic properties and the planarity degree in the π-extended TTF series: the prominent role of heteroatoms
Paper

Impact of solution temperature-dependent aggregation on the solid-state packing and electronic properties of polymers for organic photovoltaics

The impact of solution temperature-dependent aggregation of PffBT4T-2OD and PBT4T-2OD polymers on their electronic and solid-state packing properties is investigated using MD simulations and DFT calculations.

Graphical abstract: Impact of solution temperature-dependent aggregation on the solid-state packing and electronic properties of polymers for organic photovoltaics
Paper

Polymorphism of derivatives of tert-butyl substituted acridan and perfluorobiphenyl as sky-blue OLED emitters exhibiting aggregation induced thermally activated delayed fluorescence

Blue multi-functional emitters with a perfluorobiphenyl moiety exhibiting polymorphism and changing emission colour.

Graphical abstract: Polymorphism of derivatives of tert-butyl substituted acridan and perfluorobiphenyl as sky-blue OLED emitters exhibiting aggregation induced thermally activated delayed fluorescence
Paper

Effects of conjugated bridges on the photovoltaic properties of ortho-functionalized perylene diimides for non-fullerene polymer solar cells

The structure of the π-bridge in an ortho-functionalized PDI plays a crucial role in controlling the active layer morphology.

Graphical abstract: Effects of conjugated bridges on the photovoltaic properties of ortho-functionalized perylene diimides for non-fullerene polymer solar cells
23 items

About this collection

Guest Edited by Graeme Cooke, University of Glasgow, Ivana Evans, Durham University, and Peter Skabara, University of Glasgow.

This themed issue on ‘Functional Organic Materials for Optoelectronic Applications’ will showcase recent advances in experimental and/or theoretical studies of organic materials spanning the range of small molecules to polymers. The work is driven by potential applications of the materials as active components in areas such as OLEDs, organic solar cells, transistors, sensors, and charge and energy transport devices.

The themed collection will accompany the Functional Organic Materials Symposium which will be held at Durham University 12-13th September 2019, in recognition of the achievements and contributions made in this field by Professor Martin Bryce. Further details, as they become available, will be posted in the event website:

http://www.dur.ac.uk/chemistry/FOM2019/

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