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Themed collection Global Energy Challenges: Energy Applications

44 items
Open Access Edge Article

Indolo[3,2-b]indole-based crystalline hole-transporting material for highly efficient perovskite solar cells

A fluorinated indolo[3,2-b]indole (IDID) derivative is prepared as a crystalline hole transporting material for perovskite solar cells. A fluorinated IDID backbone enables a tight molecular stacking by π–π interaction. The device fabricated using IDIDF exhibits a PCE of 19%.

Graphical abstract: Indolo[3,2-b]indole-based crystalline hole-transporting material for highly efficient perovskite solar cells
Open Access Edge Article

Photodriven hydrogen evolution by molecular catalysts using Al2O3-protected perylene-3,4-dicarboximide on NiO electrodes

Photodriven charge transfer dynamics are described for an atomic layer deposition-stabilized, organic dye-sensitized photocathode architecture that produces hydrogen.

Graphical abstract: Photodriven hydrogen evolution by molecular catalysts using Al2O3-protected perylene-3,4-dicarboximide on NiO electrodes
Open Access Edge Article

Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells

Regioisomer separations of [70]fullerene mono-adducts for polymer solar cell (PSC) applications were conducted for the first time.

Graphical abstract: Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Achievement of visible-light-driven Z-scheme overall water splitting using barium-modified Ta3N5 as a H2-evolving photocatalyst

Barium-modified Ta3N5 for the promotion of proton reduction is first employed as a H2-evolving photocatalyst for visible-light-driven Z-scheme overall water splitting.

Graphical abstract: Achievement of visible-light-driven Z-scheme overall water splitting using barium-modified Ta3N5 as a H2-evolving photocatalyst
From the themed collection: Global Energy Challenges: Hydrogen Energy
Open Access Edge Article

Enhancement of charge transport properties of small molecule semiconductors by controlling fluorine substitution and effects on photovoltaic properties of organic solar cells and perovskite solar cells

Effects of fluorine substitution of small molecular semiconductor on charge transport and photovoltaic properties are systematically studied.

Graphical abstract: Enhancement of charge transport properties of small molecule semiconductors by controlling fluorine substitution and effects on photovoltaic properties of organic solar cells and perovskite solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance

The influence of macromolecular composition on Li dendrite supression in solid polymer electrolytes was elucidated.

Graphical abstract: Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance
Open Access Edge Article

Measuring the oxygen content of a single oil droplet

Using toluene droplets as a model for artificial oxygen carriers, the real-time measurement of attomole oxygen contents at the individual droplet level is reported for the first time.

Graphical abstract: Measuring the oxygen content of a single oil droplet
Open Access Edge Article

Ultrahigh performance supercapacitors utilizing core–shell nanoarchitectures from a metal–organic framework-derived nanoporous carbon and a conducting polymer

Nanoarchitectured nanoporous carbon/conducting polymer core–shell nanocomposites (carbon–PANI) are prepared from metal–organic framework-derived carbon and the controlled polymerization of polyaniline nanorods.

Graphical abstract: Ultrahigh performance supercapacitors utilizing core–shell nanoarchitectures from a metal–organic framework-derived nanoporous carbon and a conducting polymer
Open Access Edge Article

Dithieno[3,2-b:2′,3′-d]pyridin-5(4H)-one based D–A type copolymers with wide bandgaps of up to 2.05 eV to achieve solar cell efficiencies of up to 7.33%

A PCE of 7.33% was achieved in a PSC based on a new copolymer, PDTPO-IDT, with bandgaps of up to 2.05 eV.

Graphical abstract: Dithieno[3,2-b:2′,3′-d]pyridin-5(4H)-one based D–A type copolymers with wide bandgaps of up to 2.05 eV to achieve solar cell efficiencies of up to 7.33%
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO2 electrode for photoelectrochemical water splitting

The key to phase junctions for efficient charge separation is to consider both the phase alignment and interface structure.

Graphical abstract: Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO2 electrode for photoelectrochemical water splitting
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Donor–π–donor type hole transporting materials: marked π-bridge effects on optoelectronic properties, solid-state structure, and perovskite solar cell efficiency

Donor–π-bridge–donor type oligomers (D–π–D) have been studied intensively as active materials for organic optoelectronic devices.

Graphical abstract: Donor–π–donor type hole transporting materials: marked π-bridge effects on optoelectronic properties, solid-state structure, and perovskite solar cell efficiency
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

A “roller-wheel” Pt-containing small molecule that outperforms its polymer analogs in organic solar cells

“Roller-wheel” shaped Pt-containing molecules display enhanced crystallinity and are better performing organic solar cell materials than conventional small molecules and polymers featuring “dumbbell” shaped structures.

Graphical abstract: A “roller-wheel” Pt-containing small molecule that outperforms its polymer analogs in organic solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Effect of multi-armed triphenylamine-based hole transporting materials for high performance perovskite solar cells

The performance of planar perovskite solar cells was enhanced by using hole transporting materials containing triphenylamine groups with a multi-armed structure.

Graphical abstract: Effect of multi-armed triphenylamine-based hole transporting materials for high performance perovskite solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Catalytic activities for methanol oxidation on ultrathin CuPt3 wavy nanowires with/without smart polymer

CuPt3 nanowires are synthesized with a thermosensitive amine-terminated poly(N-isopropylacrylamide) polymer, displaying “smart” temperature-controllable electrocatalytic activity towards the methanol oxidation reaction.

Graphical abstract: Catalytic activities for methanol oxidation on ultrathin CuPt3 wavy nanowires with/without smart polymer
From the themed collection: Global Energy Challenges: Energy Applications
Open Access Edge Article

Effects of heteroatom substitution in spiro-bifluorene hole transport materials

By introducing the heteroatom into the benchmark hole transport material Spiro-MeOTAD, the energy level of hole transport materials can be tuned.

Graphical abstract: Effects of heteroatom substitution in spiro-bifluorene hole transport materials
From the themed collection: In celebration of Chinese New Year
Open Access Edge Article

Unveiling iodine-based electrolytes chemistry in aqueous dye-sensitized solar cells

The chemistry behind the I/I3 redox couple is thoroughly investigated in 100% aqueous dye-sensitized solar cells, paving the way to this emerging green PV technology.

Graphical abstract: Unveiling iodine-based electrolytes chemistry in aqueous dye-sensitized solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

On the application of the tolerance factor to inorganic and hybrid halide perovskites: a revised system

Can new hybrid perovskites be predicted using the tolerance factor?

Graphical abstract: On the application of the tolerance factor to inorganic and hybrid halide perovskites: a revised system
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Insight into the charge transfer in particulate Ta3N5 photoanode with high photoelectrochemical performance

Charge transfer has been demonstrated to have a fundamental role in particulate Ta3N5 electrode for achieving high efficient photoelectrochemical water oxidation.

Graphical abstract: Insight into the charge transfer in particulate Ta3N5 photoanode with high photoelectrochemical performance
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Ring-fusion as a perylenediimide dimer design concept for high-performance non-fullerene organic photovoltaic acceptors

A series of perylenediimide (PDI) dimers are evaluated as acceptors for organic photovoltaic (OPV) cells.

Graphical abstract: Ring-fusion as a perylenediimide dimer design concept for high-performance non-fullerene organic photovoltaic acceptors
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Understanding the origin of photoelectrode performance enhancement by probing surface kinetics

Probing the surface kinetics of different hematite electrodes with and without surface passivations.

Graphical abstract: Understanding the origin of photoelectrode performance enhancement by probing surface kinetics
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

A single cation or anion dendrimer-based liquid electrolyte

The proposed dendrimer based liquid electrolyte is a single-ion conductor where ion transport is altered by the nature of the chemical functionalities leading to large variations in anion diffusion and hence ionic transference number.

Graphical abstract: A single cation or anion dendrimer-based liquid electrolyte
From the themed collection: Global Energy Challenges: Energy Applications
Open Access Edge Article

The importance of nickel oxyhydroxide deprotonation on its activity towards electrochemical water oxidation

The OER activity of NiOOH enhances at pH > 11 due to formation of superoxo-like species on its surface.

Graphical abstract: The importance of nickel oxyhydroxide deprotonation on its activity towards electrochemical water oxidation
Open Access Edge Article

High conductivity Ag-based metal organic complexes as dopant-free hole-transport materials for perovskite solar cells with high fill factors

Two Ag-based metal organic complexes (HA1 and HA2) are employed as a new class of dopant-free HTMs for the application in PSCs. The cell based on HA1 achieved high PCE of 11.98% under air conditions, which is comparable to the PCE of the cell employing the doped spiro-MeOTAD (12.27%) under the same conditions.

Graphical abstract: High conductivity Ag-based metal organic complexes as dopant-free hole-transport materials for perovskite solar cells with high fill factors
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Creation of a new type of ion exchange material for rapid, high-capacity, reversible and selective ion exchange without swelling and entrainment

A new model for ion exchange materials has been proposed on the basis of ion exchange sites grafted to a porous organic polymer.

Graphical abstract: Creation of a new type of ion exchange material for rapid, high-capacity, reversible and selective ion exchange without swelling and entrainment
Open Access Edge Article

Understanding and removing surface states limiting charge transport in TiO2 nanowire arrays for enhanced optoelectronic device performance

An effective wet-chemistry approach is demonstrated to minimize the trap states that limit electron transport in rutile TiO2 nanowire arrays, this leads to an over 20-fold enhancement in the electron diffusion coefficient.

Graphical abstract: Understanding and removing surface states limiting charge transport in TiO2 nanowire arrays for enhanced optoelectronic device performance
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Spatial separation of oxidation and reduction co-catalysts for efficient charge separation: Pt@TiO2@MnOx hollow spheres for photocatalytic reactions

The design and synthesis of fine Pt@TiO2@MnOx hollow spheres is described. Pt and MnOx are spatially separated by TiO2 shells. The catalyst exhibits high efficiency of charge-separation and surface-reaction.

Graphical abstract: Spatial separation of oxidation and reduction co-catalysts for efficient charge separation: Pt@TiO2@MnOx hollow spheres for photocatalytic reactions
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Ultra-large optical modulation of electrochromic porous WO3 film and the local monitoring of redox activity

Porous WO3 films with ultra-high transmittance modulation were successfully fabricated on different substrates by a novel electrochemical deposited method.

Graphical abstract: Ultra-large optical modulation of electrochromic porous WO3 film and the local monitoring of redox activity
Open Access Edge Article

Solid state lithiation–delithiation of sulphur in sub-nano confinement: a new concept for designing lithium–sulphur batteries

Sub-nano confinement of sulphur enables a solid-state lithium–sulfur electrochemical reaction mechanism in liquid electrolytes.

Graphical abstract: Solid state lithiation–delithiation of sulphur in sub-nano confinement: a new concept for designing lithium–sulphur batteries
Open Access Edge Article

Ruthenium(II)-polypyridyl zirconium(IV) metal–organic frameworks as a new class of sensitized solar cells

Ruthenium(II) polypyridyl-doped metal–organic framework sensitized films on TiO2 for photovoltaics reveal that the preparative method of dye doping/incorporation into the MOF is integral to the total solar cell efficiency.

Graphical abstract: Ruthenium(ii)-polypyridyl zirconium(iv) metal–organic frameworks as a new class of sensitized solar cells
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Increased upconversion performance for thin film solar cells: a trimolecular composition

A dual-emitter upconvertor is applied to thin-film solar cells for the first time, generating record figures of merit.

Graphical abstract: Increased upconversion performance for thin film solar cells: a trimolecular composition
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Ring-chain synergy in ionic liquid electrolytes for lithium batteries

The ionic liquid-based electrolyte containing ring-like Pyr1,2O1TFSI and chain-like DMS exhibits good overall performance in lithium-ion batteries.

Graphical abstract: Ring-chain synergy in ionic liquid electrolytes for lithium batteries
Open Access Edge Article

Solar-microbial hybrid device based on oxygen-deficient niobium pentoxide anodes for sustainable hydrogen production

A new solar-microbial hybrid device based on oxygen-deficient Nb2O5 anodes for sustainable hydrogen generation without external bias was demonstrated.

Graphical abstract: Solar-microbial hybrid device based on oxygen-deficient niobium pentoxide anodes for sustainable hydrogen production
From the themed collection: Global Energy Challenges: Hydrogen Energy
Open Access Edge Article

Fast electrosynthesis of Fe-containing layered double hydroxide arrays toward highly efficient electrocatalytic oxidation reactions

Fast electrosynthesis of Fe-containing layered double hydroxide arrays and their highly-efficient electrocatalytic performance toward small molecule oxidation reactions.

Graphical abstract: Fast electrosynthesis of Fe-containing layered double hydroxide arrays toward highly efficient electrocatalytic oxidation reactions
Open Access Edge Article

Thermally-responsive, nonflammable phosphonium ionic liquid electrolytes for lithium metal batteries: operating at 100 degrees celsius

Lithium metal battery cycling at 100 °C is enabled by thermally-responsive, nonflammable phosphonium ionic liquid electrolytes.

Graphical abstract: Thermally-responsive, nonflammable phosphonium ionic liquid electrolytes for lithium metal batteries: operating at 100 degrees celsius
Open Access Edge Article

In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell

Using near ambient pressure X-ray photoelectron spectroscopy we probe in situ the double layer at the Pt/liquid electrolyte interface.

Graphical abstract: In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell
Open Access Edge Article

Tetraarylborate polymer networks as single-ion conducting solid electrolytes

A new family of solid polymer electrolytes based upon anionic tetrakis(phenyl)borate tetrahedral nodes and linear bis-alkyne linkers is reported.

Graphical abstract: Tetraarylborate polymer networks as single-ion conducting solid electrolytes
Open Access Edge Article

Vibrational properties and bonding nature of Sb2Se3 and their implications for chalcogenide materials

There is more to chemical bonding in chalcogenides than the shortest, strongest bonds, as revealed by microscopic quantum-chemical descriptors.

Graphical abstract: Vibrational properties and bonding nature of Sb2Se3 and their implications for chalcogenide materials
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Wide bandgap OPV polymers based on pyridinonedithiophene unit with efficiency >5%

We report the properties of a new series of wide band gap photovoltaic polymers based on the N-alkyl 2-pyridone dithiophene (PDT) unit.

Graphical abstract: Wide bandgap OPV polymers based on pyridinonedithiophene unit with efficiency >5%
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Doping-induced memory effect in Li-ion batteries: the case of Al-doped Li4Ti5O12

A memory effect in Li-ion batteries can be induced and tailored by element doping, such as Al-doping in spinel Li4Ti5O12.

Graphical abstract: Doping-induced memory effect in Li-ion batteries: the case of Al-doped Li4Ti5O12
Open Access Edge Article

Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers

Ir nanodendrites (Ir-ND) supported on antimony doped tin oxide (ATO) show enhanced catalytic activity and stability for oxygen evolution reaction (OER) in polymer electrolyte membrane (PEM) water electrolysis.

Graphical abstract: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers
Open Access Edge Article

Single graphene nanoplatelets: capacitance, potential of zero charge and diffusion coefficient

A nano-impact chronoamperometric experiment is presented here as a powerful technique for simultaneously probing important physical properties of graphene nanomaterials.

Graphical abstract: Single graphene nanoplatelets: capacitance, potential of zero charge and diffusion coefficient
Open Access Edge Article

Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe2 photocathodes modified with CdS and CuGa3Se5

The multilayer structure enhances the hydrogen evolution from water under simulated sunlight.

Graphical abstract: Durable hydrogen evolution from water driven by sunlight using (Ag,Cu)GaSe2 photocathodes modified with CdS and CuGa3Se5
From the themed collection: Global Energy Challenges: Hydrogen Energy
Open Access Edge Article

Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics

A reversible photo-induced instability has been found in mixed-halide photovoltaic perovskites that limits the open circuit voltage in solar cells.

Graphical abstract: Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics
From the themed collection: Global Energy Challenges: Solar Energy
Open Access Edge Article

Oxygen evolution on well-characterized mass-selected Ru and RuO2 nanoparticles

Well-defined mass-selected Ru and RuO2 nanoparticles exhibit an order of magnitude improvement in the oxygen evolution activity, relative to the state-of-the-art, with a maximum at around 3–5 nm.

Graphical abstract: Oxygen evolution on well-characterized mass-selected Ru and RuO2 nanoparticles
From the themed collection: Global Energy Challenges: Hydrogen Energy
44 items

About this collection

We are delighted to present an online collection showcasing recently published articles in the field of energy. To address major issues facing our planet, researchers all over the world have increasingly focused their efforts on finding solutions to these energy challenges. These articles highlight some of the excellent work that tackles important global challenges related to energy. We hope you enjoy reading this collection!

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