Themed collection Special issue in memoriam of Alasdair James Campbell

21 items
Editorial

In memoriam of Alasdair James Campbell

Natalie Stingelin and Garry Rumbles introduce this joint Journal of Materials Chemistry C and Sustainable Energy & Fuels collection in memory of Professor Alasdair J Campbell.

Graphical abstract: In memoriam of Alasdair James Campbell
Review Article

Charge transport materials for mesoscopic perovskite solar cells

An overview on recent advances in the fundamental understanding of how interfaces of mesoscopic perovskite solar cells (mp-PSCs) with different architectures, upon incorporating various charge transport layers, influence their performance.

Graphical abstract: Charge transport materials for mesoscopic perovskite solar cells
Open Access Review Article

Best practices in the measurement of circularly polarised photodetectors

Here we provide a framework of standardised apparatus and tests which enable rigorous characterisation of the performance of photodetectors sensitive to circular polarisation, enabling meaningful comparisons between devices reported in literature.

Graphical abstract: Best practices in the measurement of circularly polarised photodetectors
Review Article

Design of biodegradable and biocompatible conjugated polymers for bioelectronics

Blueprints for the chemical design of biodegradability and biocompatibility for organic semiconductors. Recent trends and future areas of interest are discussed.

Graphical abstract: Design of biodegradable and biocompatible conjugated polymers for bioelectronics
Open Access Communication

Elucidating the electronic properties of single-wall carbon nanohorns

Thermopower measurements directly illustrate that as-grown SWCNHs are p-type semiconductors, while chemical doping can also be used to tune the majority carrier density and type.

Graphical abstract: Elucidating the electronic properties of single-wall carbon nanohorns
Open Access Communication

Modular chiral Eu(III) complexes for efficient circularly polarized OLEDs

Chiral lanthanide complexes can be prepared by choosing the achiral antenna ligand and the chiral inducer independently. With this modular approach, complexes optimized for use in efficient CP-OLEDs may be obtained.

Graphical abstract: Modular chiral Eu(iii) complexes for efficient circularly polarized OLEDs
Paper

Solution-processable donor–π–acceptor type thieno[3,2-b]thiophene derivatives; synthesis, photophysical properties and applications

Two new D–π–A-type fluorescent materials with nearly quantitative quantum yields, possessing thieno[3,2-b]thiophene, triphenylamine and boron units, were synthesized and their devices were fabricated via a solution process.

Graphical abstract: Solution-processable donor–π–acceptor type thieno[3,2-b]thiophene derivatives; synthesis, photophysical properties and applications
Open Access Paper

Enhancing hole carrier injection via low electrochemical doping on circularly polarized polymer light-emitting diodes

The noble electrochemical doping agent enables stable electrochemical doping of achiral π-CP in π-CP:aza[6]H blends, which allows better charge injection and balance for efficient circularly polarized optoelectronic devices.

Graphical abstract: Enhancing hole carrier injection via low electrochemical doping on circularly polarized polymer light-emitting diodes
From the themed collection: Recent Open Access Articles
Open Access Paper

Inverted organic photovoltaics with a solution-processed Mg-doped ZnO electron transport layer annealed at 150 °C

Mg acetate is added to Zn acetate solutions to form Mg-doped ZnO electron transport layers with an annealing temperature of 150 °C. Application of the Mg-doped ZnO in organic photovoltaic enhances the efficiency compared to devices with undoped ZnO.

Graphical abstract: Inverted organic photovoltaics with a solution-processed Mg-doped ZnO electron transport layer annealed at 150 °C
Open Access Paper

Understanding electrochemical properties of supported lipid bilayers interfaced with organic electronic devices

Native and synthetic membranes can be electrically monitored by creating supported lipid bilayers on top of conducting polymer electrodes. Cell membrane characteristics, e.g. the function of transmembrane proteins, are studied in this paper, along with device sensitivity.

Graphical abstract: Understanding electrochemical properties of supported lipid bilayers interfaced with organic electronic devices
Open Access Paper

Relationship between molecular properties and degradation mechanisms of organic solar cells based on bis-adducts of phenyl-C61 butyric acid methyl ester

Change of the side chain position of bis-PCBM can modulate the molecular parameters and further serve as a strategy to control the stability of organic solar cells.

Graphical abstract: Relationship between molecular properties and degradation mechanisms of organic solar cells based on bis-adducts of phenyl-C61 butyric acid methyl ester
From the themed collection: Journal of Materials Chemistry C HOT Papers
Open Access Paper

Efficient bandgap widening in co-evaporated MAPbI3 perovskite

Co-evaporated perovskite solar cells have shown outstanding scalability, intrinsic stability, high efficiency and adaptability on rough surfaces. Here we present an optimal hybrid method to wide the co-evaporated MAPbI3's bandgap by a MABr treatment.

Graphical abstract: Efficient bandgap widening in co-evaporated MAPbI3 perovskite
Open Access Paper

Engineering the sign of circularly polarized emission in achiral polymer – chiral small molecule blends as a function of blend ratio

We demonstrate CP-OLEDs with an impressive electroluminescence dissymmetry factor (gEL) > 0.3. The handedness of circularly polarized PL/EL can be inverted by varying the active layer thickness and chiral additive loading ratio.

Graphical abstract: Engineering the sign of circularly polarized emission in achiral polymer – chiral small molecule blends as a function of blend ratio
Open Access Paper

Polariton condensation in a microcavity using a highly-stable molecular dye

We have fabricated organic polariton microcavities that exhibit remarkable photostability, even in the condensation regime.

Graphical abstract: Polariton condensation in a microcavity using a highly-stable molecular dye
Paper

Plasmonic PHOLEDs: increasing OLED stability

A novel organic light emitting device intentionally couples emitter energy to the plasmon mode for increased device stability and converts plasmons to photons to improve device efficiency.

Graphical abstract: Plasmonic PHOLEDs: increasing OLED stability
Open Access Paper

Versatile methods for improving the mechanical properties of fullerene and non-fullerene bulk heterojunction layers to enable stretchable organic solar cells

A cross-linker and an elastomer are used to increase the mechanical compliance of the active layer in organic solar cells based on fullerene and non-fullerene acceptors without compromising their performance.

Graphical abstract: Versatile methods for improving the mechanical properties of fullerene and non-fullerene bulk heterojunction layers to enable stretchable organic solar cells
Open Access Paper

Comparing the microstructure and photovoltaic performance of 3 perylene imide acceptors with similar energy levels but different packing tendencies

We have synthetized a series of perylene imide molecules with varying structure from planar to three-dimensional. The best photovoltaic performance is obtained when each acceptor is paired with a donor polymer with complementary packing tendency.

Graphical abstract: Comparing the microstructure and photovoltaic performance of 3 perylene imide acceptors with similar energy levels but different packing tendencies
From the themed collection: Recent Open Access Articles
Open Access Paper

Spiro donor–acceptor TADF emitters: naked TADF free from inhomogeneity caused by donor acceptor bridge bond disorder. Fast rISC and invariant photophysics in solid state hosts

The molecular photophysics of 10-phenyl-10H,10′H-spiro[acridine-9,9′-anthracen]-10′-one (ACRSA) are used as an ideal molecule to probe how external factors affect the TADF and rISC mechanisms.

Graphical abstract: Spiro donor–acceptor TADF emitters: naked TADF free from inhomogeneity caused by donor acceptor bridge bond disorder. Fast rISC and invariant photophysics in solid state hosts
Open Access Paper

Polymer source-gated transistors with low saturation voltage

High ionisation potential polymer transistors with unavoidable Schottky contacts are used to provide very stable and low-current operation with a very low saturation voltage of 2 V even with thick gate dielectric due to source-gated transistor design.

Graphical abstract: Polymer source-gated transistors with low saturation voltage
Open Access Paper

The synthesis and application of novel benzodithiophene based reactive mesogens with negative wavelength dispersion birefringence

The factors influencing negative wavelength dispersion are investigated for a series of benzodithiophene based photopolymerisable liquid crystals.

Graphical abstract: The synthesis and application of novel benzodithiophene based reactive mesogens with negative wavelength dispersion birefringence
Obituary

In memoriam Alasdair James Campbell (11 May 1961–27 February 2021)

Celebrating the life of Alasdair Campbell.

Graphical abstract: In memoriam Alasdair James Campbell (11 May 1961–27 February 2021)
21 items

About this collection

As a physicist, Professor Al Campbell had a tremendous impact on the broad field of organic electronics, contributing fundamental research on state-of-the-art display technologies, printed solar cells, photodetectors and transistors, neuromorphic computing and organic biomedical sensors. His work influenced the fields of materials chemistry, bioelectronics and materials science by providing the mechanistic understanding and methods to exploit underlying solid-state physics phenomena.

Al’s fundamental understanding of structure-property relationships in organic, inorganic and hybrid semiconductors, coupled with his deep appreciation for electronics, allowed him to push new boundaries. Amongst these were the development of large-area printing technologies, resulting in flexible organic light-emitting diodes, organic field-effect transistors and polymer-based sensors for biochemical detection.

Ever on the quest for innovation, Al’s most recent research took him to the world of chiral functional materials, combining his knowledge of polyfluorenes with small chiral molecules to generate circularly polarised luminescence and absorption in OLEDs and photodetectors. Such devices have application in creating efficient displays, quantum optics, bioimaging and encrypted communications. 

This collection of papers is a celebration of Al's achievements and contains papers from friends and colleagues in these areas, where he had such impact.


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