David J. Fermı́n
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View article: Highly Corrugated Ni Films Electrodeposited onto Boron Doped Diamond Electrodes for Alkaline Water Electrolysis
Highly Corrugated Ni Films Electrodeposited onto Boron Doped Diamond Electrodes for Alkaline Water Electrolysis Open
Ni-based electrocatalysts are among the most active materials for the hydrogen evolution reaction (HER) in alkaline media. In this work, we demonstrate the ability to use films of boron-doped diamond (BDD), a stable and corrosion-resistant…
View article: From Solutions to Photovoltaic Devices: Assessing the Impact of Zn Complexation for Bifacial Cu <sub>2</sub> ZnSn(S,Se) <sub>4</sub> Thin Films
From Solutions to Photovoltaic Devices: Assessing the Impact of Zn Complexation for Bifacial Cu <sub>2</sub> ZnSn(S,Se) <sub>4</sub> Thin Films Open
Solution-based deposition of high-quality inorganic compound semiconductors onto a variety of substrates is a key challenge toward integrating photovoltaic technologies into a wide range of infrastructures. Cu2ZnSn-(S,Se)4 (CZTSSe) is one …
View article: Bilayer of Atomic Layer Deposition and Solution‐Processed Tin Dioxide as a Pathway to High‐Performance Electron Transport Layers for Perovskite Solar Cells
Bilayer of Atomic Layer Deposition and Solution‐Processed Tin Dioxide as a Pathway to High‐Performance Electron Transport Layers for Perovskite Solar Cells Open
This perspective explores the transformative potential of atomic layer deposition (ALD) in fabricating high‐performance tin dioxide (SnO 2 ) electron transport layers (ETLs) for perovskite solar cells (PSCs). ALD ensures conformal coatings…
View article: Tuning the Surface Electronic Landscape of Ultrathin (Al,Sn)O <i> <sub>x</sub> </i> Electron Extraction Layers in Perovskite Solar Cells
Tuning the Surface Electronic Landscape of Ultrathin (Al,Sn)O <i> <sub>x</sub> </i> Electron Extraction Layers in Perovskite Solar Cells Open
Power conversion losses at the electron transport layer (ETL) are key limiting factors in high‐performance perovskite solar cells (PSC) and silicon‐PSC tandem systems. Solution‐processed nanoparticle tin dioxide ( np ‐SnO 2 ) films typical…
View article: Perspective: Atomic Layer Deposition Strategies for Surface Passivation of Metal-Halide Perovskite Absorbers
Perspective: Atomic Layer Deposition Strategies for Surface Passivation of Metal-Halide Perovskite Absorbers Open
Recent advancements have been made in perovskite solar cells (PSCs) using atomic layer deposition (ALD) of aluminum oxide (Al 2 O 3 ) and other suitable metal oxides such as zirconium oxide (ZrO 2 ) as a perovskite surface passivation tech…
View article: Mapping the surface electronic landscape of solution-processed CuIn(S,Se) <sub>2</sub> thin-films as a function of the Cu/In ratio
Mapping the surface electronic landscape of solution-processed CuIn(S,Se) <sub>2</sub> thin-films as a function of the Cu/In ratio Open
Tuning the Cu/In ratio in solution-processed CISSe thin films reveals a complex interplay between bulk and surface disorder, significantly affecting the optoelectronic properties, phase formation and photovoltaic performance.
View article: Utilizing Solvent Repulsion between Dimethylformamide and Isopropanol to Manipulate Sn Distribution for Bifacial Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Solar Cells
Utilizing Solvent Repulsion between Dimethylformamide and Isopropanol to Manipulate Sn Distribution for Bifacial Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Solar Cells Open
Rationalizing the role of chemical interactions in the precursor solutions on the structure, morphology, and performance of thin-film Cu2ZnSn(S,Se)4 (CZTSSe) is key for the development of bifacial and other photovoltaic (PV) device archite…
View article: Porous carbons: a class of nanomaterials for efficient adsorption-based hydrogen storage
Porous carbons: a class of nanomaterials for efficient adsorption-based hydrogen storage Open
This review provides an overview of porous carbon materials and their hydrogen storage properties with insight on strategic improvement by structural and chemical modifications and current trends of using machine learning and lifecycle ass…
View article: Correlating Molecular Precursor Interactions with Device Performance in Solution-Processed Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Thin-Film Solar Cells
Correlating Molecular Precursor Interactions with Device Performance in Solution-Processed Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Thin-Film Solar Cells Open
Research efforts aimed at improving the crystal quality of solution-processed Cu2ZnSn(S,Se)4 (CZTSSe) absorbers have largely employed delicate pre- and postprocessing strategies, such as multistep selenization, heat treatment in mixed chal…
View article: Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM‐EA‐TB)
Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM‐EA‐TB) Open
Ionic diodes are components in ionic circuits for AC‐electricity driven desalination and ion extraction processes. Independent of the ionic diode type/mechanism, achieving ionic current rectification at high ionic strengths is challenging …
View article: Recent Developments in Atomic Layer Deposition of Functional Overlayers in Perovskite Solar Cells
Recent Developments in Atomic Layer Deposition of Functional Overlayers in Perovskite Solar Cells Open
Over the last decade, research in organic–inorganic lead halide perovskite solar cells (PSCs) has gathered unprecedented momentum, putting the technology on the brink of full-scale commercialization. A wide range of strategies have been im…
View article: Activating Mn Sites by Ni Replacement in α-MnO<sub>2</sub>
Activating Mn Sites by Ni Replacement in α-MnO<sub>2</sub> Open
Transition metal oxides are characterized by an acute structure and composition dependent electrocatalytic activity toward the oxygen evolution (OER) and oxygen reduction (ORR) reactions. For instance, Mn containing oxides are among the mo…
View article: Can We Decarbonise Methanol Production by Direct Electrochemical CO<sub>2</sub> Reduction?
Can We Decarbonise Methanol Production by Direct Electrochemical CO<sub>2</sub> Reduction? Open
Methanol is one of the most important chemical feedstocks, with an increase in global demand of more than 20 million tonnes since 2017. The current production of methanol is primarily from fossil fuel derived synthetic gas (syngas), produc…
View article: Mapping the Energetics of Defect States in Cu<sub>2</sub>ZnSnS<sub>4</sub> films and the Impact of Sb Doping
Mapping the Energetics of Defect States in Cu<sub>2</sub>ZnSnS<sub>4</sub> films and the Impact of Sb Doping Open
The sub-bandgap levels associated with defect states in Cu2ZnSnS4 (CZTS) thin films are investigated by correlating the temperature dependence of the absorber photoluminescence (PL) with the device admittance spectroscopy. CZTS thin films …
View article: Correlating Orbital Composition and Activity of LaMn<sub><i>x</i></sub>Ni<sub>1–<i>x</i></sub>O<sub>3</sub> Nanostructures toward Oxygen Electrocatalysis
Correlating Orbital Composition and Activity of LaMn<sub><i>x</i></sub>Ni<sub>1–<i>x</i></sub>O<sub>3</sub> Nanostructures toward Oxygen Electrocatalysis Open
The atomistic rationalization of the activity of transition metal oxides toward oxygen electrocatalysis is one of the most complex challenges in the field of electrochemical energy conversion. Transition metal oxides exhibit a wide range o…
View article: The sustainable materials roadmap
The sustainable materials roadmap Open
Over the past 150 years, our ability to produce and transform engineered materials has been responsible for our current high standards of living, especially in developed economies. However, we must carefully think of the effects our addict…
View article: <i>Ex situ</i> Ge-doping of CZTS nanocrystals and CZTSSe solar absorber films
<i>Ex situ</i> Ge-doping of CZTS nanocrystals and CZTSSe solar absorber films Open
Ge doping is employed to aid the recrystallisation of Cu 2 ZnSnS 4 nanocrystals. Opto-electrical properties are presented to describe Ge incorporation with a focus on the electronic interface between the Ge:Cu 2 ZnSn(S, Se), absorber and C…
View article: Indium-free CIGS analogues: general discussion
Indium-free CIGS analogues: general discussion Open
Rafael Jaramillo opened discussion of the introductory lecture by David Mitzi: What is your most trusted approach to accurately measure the absorption coefficient on a new thin film material? David Mitzi replied: The point about significan…
View article: Bulk and surface characterisation techniques of solar absorbers: general discussion
Bulk and surface characterisation techniques of solar absorbers: general discussion Open
peer reviewed
View article: Novel chalcogenides, pnictides and defect-tolerant semiconductors: general discussion
Novel chalcogenides, pnictides and defect-tolerant semiconductors: general discussion Open
David O. Scanlon opened a discussion of the paper by Mirjana Dimitrievska: Thank you for the very nice talk Mirjana! Zn and P on their own are toxic and earth abundant, but when together as Zn3P2, they make a very potent rat poison. Are yo…
View article: Decoupling the impact of bulk and surface point defects on the photoelectrochemical properties of LaFeO<sub>3</sub> thin films
Decoupling the impact of bulk and surface point defects on the photoelectrochemical properties of LaFeO<sub>3</sub> thin films Open
This article shows, for the first time, the delicate balance between controlling bulk recombination sites and dynamics of interfacial carrier transfer via independently tuning the bulk and surface compositions of perovskite oxide thin film…
View article: Synthetic Mechanism Studies of Iron Selenides: An Emerging Class of Materials for Electrocatalysis
Synthetic Mechanism Studies of Iron Selenides: An Emerging Class of Materials for Electrocatalysis Open
Solution-processed iron selenide nanocrystals (NCs) have recently attracted considerable attention in electrocatalysis water splitting. Nevertheless, a primary challenge in current iron-based NCs chemical synthesis is controlling phase pur…
View article: Relationship between Mn Oxidation State Changes and Oxygen Reduction Activity in (La,Ca)MnO<sub>3</sub> as Probed by <i>In Situ</i> XAS and XES
Relationship between Mn Oxidation State Changes and Oxygen Reduction Activity in (La,Ca)MnO<sub>3</sub> as Probed by <i>In Situ</i> XAS and XES Open
In situ X-ray absorption and emission spectroscopies (XAS and XES) are used to provide details regarding the role of the accessibility and extent of redox activity of the Mn ions in determining the oxygen reduction activity of LaMnO3 and C…
View article: Electrocatalytic Site Activity Enhancement via Orbital Overlap in A<sub>2</sub>MnRuO<sub>7</sub> (A = Dy<sup>3+</sup>, Ho<sup>3+</sup>, and Er<sup>3+</sup>) Pyrochlore Nanostructures
Electrocatalytic Site Activity Enhancement via Orbital Overlap in A<sub>2</sub>MnRuO<sub>7</sub> (A = Dy<sup>3+</sup>, Ho<sup>3+</sup>, and Er<sup>3+</sup>) Pyrochlore Nanostructures Open
Oxygen electrocatalysis at transition metal oxides is one of the key challenges underpinning electrochemical energy conversion systems, involving a delicate interplay of the bulk electronic structure and surface coordination of the active …
View article: High Interfacial Hole‐Transfer Efficiency at GaFeO<sub>3</sub> Thin Film Photoanodes
High Interfacial Hole‐Transfer Efficiency at GaFeO<sub>3</sub> Thin Film Photoanodes Open
The photoelectrochemical properties of polycrystalline GaFeO 3 (GFO) thin films are investigated for the first time. Thin films prepared by sol–gel methods exhibit phase‐pure orthorhombic GFO with the Pc 21 n space group, as confirmed by X…
View article: Promoting Active Electronic States in LaFeO<sub>3</sub> Thin-Films Photocathodes via Alkaline-Earth Metal Substitution
Promoting Active Electronic States in LaFeO<sub>3</sub> Thin-Films Photocathodes via Alkaline-Earth Metal Substitution Open
The effects of alkaline-earth metal cation (AMC; Mg2+, Ca2+, Sr2+, and Ba2+) substitution on the photoelectrochemical properties of phase-pure LaFeO3 (LFO) thin-films are elucidated by X-ray photoemission spectroscopy (XPS), X-ray diffract…
View article: Pulsed laser deposition of single phase n- and p-type Cu2O thin films with low resistivity
Pulsed laser deposition of single phase n- and p-type Cu2O thin films with low resistivity Open
Low resistivity (~3-24 mOhm.cm) with tunable n- and p-type phase pure Cu2O thin films have been grown by pulsed laser deposition at 25-200 0C by varying the background oxygen partial pressure (O2pp). Capacitance data obtained by electroche…
View article: CSD 1961688: Experimental Crystal Structure Determination
CSD 1961688: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Dataset for 'PrFeO3 photocathodes prepared through spray pyrolysis'
Dataset for 'PrFeO3 photocathodes prepared through spray pyrolysis' Open
PrFeO3 (PFO) has been shown to be an active photochemical water reduction in slurry reactors, but has yet to be shown as a photocathode for photoelectrochemical water reduction, to the best of our knowledge. The work herein describes the f…