Synthesis and Characterization of High-Photoactivity Electrodeposited Cu<sub>2</sub>O Solar Absorber by Photoelectrochemistry and Ultrafast Spectroscopy

Paracchino, Adriana; Brauer, Jan C.; Moser, Jacques-E.; Thimsen, Elijah; Gräetzel, Michael

doi:10.1021/jp301176y

Cited by 315 publications

(331 citation statements)

References 59 publications

(89 reference statements)

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“…The Cu 2 O photocathode was prepared by an electrodeposition method similar to a previously reported protocol 22,24 . Detailed description of the experimental method is given in the Methods section.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

et al. 2014

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Concerns over climate change resulting from accumulation of anthropogenic carbon dioxide in the atmosphere and the uncertainty in the amount of recoverable fossil fuel reserves are driving forces for the development of renewable, carbon-neutral energy technologies. A promising clean solution is photoelectrochemical water splitting to produce hydrogen using abundant solar energy. Here we present a simple and scalable technique for the deposition of amorphous molybdenum sulphide films as hydrogen evolution catalyst onto protected copper(I) oxide films. The efficient extraction of excited electrons by the conformal catalyst film leads to photocurrents of up to À 5.7 mA cm À 2 at 0 V versus the reversible hydrogen electrode (pH 1.0) under simulated AM 1.5 solar illumination. Furthermore, the photocathode exhibits enhanced stability under acidic environments, whereas photocathodes with platinum nanoparticles as catalyst deactivate more rapidly under identical conditions. The work demonstrates the potential of earth-abundant light-harvesting material and catalysts for solar hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

et al. 2014

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“…Also, the morphology obtained in both cases, differs from the one obtained from alkaline aqueous solutions, where cubic and pyramidal structures are frequently observed 9,[23][24][25][26][27][28] . This kind of morphology has been previously reported for ZnO films electrodeposited from a DMSO solution 29 .…”

Section: Film Characterizationmentioning

confidence: 88%

EFFECT OF CHLORIDE IONS ON THE STRUCTURAL, OPTICAL, MORPHOLOGICAL, AND ELECTROCHEMICAL PROPERTIES OF Cu2O FILMS ELECTRODEPOSITED ON FLUORINE-DOPED TIN OXIDE SUBSTRATE FROM A DMSO SOLUTION

Riveros

León

Ramírez

2016

J. Chil. Chem. Soc.

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This study shows the results attained during the electrodeposition of Cu 2 O films on fluorine-doped tin oxide (FTO) substrate from a dimethyl sulfoxide (DMSO) solution in the presence of chloride ions. Before the film electrodeposition and in order to establish the best conditions for the Cu 2 O electrodeposition, a detailed electrochemical study of the precursors in the presence of chloride ions was performed. The voltammetric profiles obtained show significant differences compared to those previously obtained during the study of the Cu 2 O electrodeposition from a free-chloride DMSO solution. These differences are the result of the coordination complexes formation between chloride ions and the different copper species in solution. The films were potentiostatically electrodeposited between -1.4 V and -1.6 V vs Ag/AgCl (sat) reference electrode. Then, these films were characterized through different techniques: X-ray diffraction, scanning electron microscopy, optical characterization, and capacitance measurements through electrochemical impedance spectroscopy.Keywords: Cu 2 O, Electrodeposition, DMSO solution, Chloride effect. INTRODUCTIONPhotovoltaic devices based on metal oxide semiconductors have being a matter of great interest, because to their chemical stability. This way, due to its properties (p-type semiconductor, direct band gap of 2.0 -2.2 eV) Cu 2 O has been considered an excellent material that can be employed in photovoltaic cells based on p-n junction thin films. Furthermore, Cu 2 O is made up of abundant non-toxic elements, which allows it to become a low-cost material 1 .Cu 2 O thin films have been prepared through the use of different techniques such as magnetron sputtering 2-3 , chemical vapor deposition 4-5 , thermal oxidation 6 , and chemical reduction 7 . Electrochemical techniques are easy and inexpensive methods for Cu 2 O thin films formation. Copper sulfate in the presence of lactic acid / lactate aqueous solution is usually the most used electrolyte for the electrodeposition of Cu 2 O thin film on different substrates [8][9][10] . However, this research group has recently verified that the electrodeposition of Cu 2 O thin films can be carried out from a dimethyl sulfoxide (DMSO) solution, using CuClO 4 and molecular oxygen as precursors 11 . These films were p-type semiconductors with an optical band gap that varied between 2.18 eV -2.25 eV with a doping level between 8.2 x 10 18 cm -3 -2.0 x 10 19 cm -3 , depending on the electrodeposition temperature. On the other hand, it is a well known fact that during the electrodeposition process, the addition of complexing agents produces drastic changes in the morphology and properties of semiconductor materials 12-13 and metals [14][15] . This way, the influence of chloride ions as a complexing agent during the Cu 2 O electrodeposition process from a DMSO solution is analyzed in this article. The results were then compared with those obtained in the absence of chloride ions. The films were smoother than those obtained in the absence ...

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“…The Cu2O cell model were constructed by McShane, the results show that the conductivity of the thin film limits the conversion rate of the cell [28] . The surface density of P-type Cu2O thin films prepared by electrodeposition was 10 13~1 0 17 [29] . The effect of doping on the preparation of Cu2O thin films were studied by Kunhee Han, the results show that bromine doping can get larger Cu2O crystal particles [30] .…”

Section: Preparation Methodsmentioning

confidence: 99%

Research Status and Development of Cu2O Thin Film Solar Cells

Jing¹,

Cui²,

Liu³

2017

dtetr

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Solar thin film battery has been dominated in the market with a safe, reliable, pollution-free and long life. Cu2O photoelectric thin film battery has been given more attention due to the advantages of the low price, abundant reserves and good photoelectric effect, Cu2O is a p-type semiconductor with a band gap of 1.9eV-2.38eV. At present, the Cu2O thin films are prepared by low cost methods such as thermal evaporation, sputtering, chemical vapor deposition and electrochemical deposition. According to the research, the photoelectric conversion efficiency of Cu2O thin film battery can only reach 2%, but the photoelectric conversion efficiency of Cu2O can reach about 20%. In this paper, the structure, properties and preparation technology of Cu2O film battery were summarized, and the development space and prospect of Cu2O film were proposed.

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Synthesis and Characterization of High-Photoactivity Electrodeposited Cu₂O Solar Absorber by Photoelectrochemistry and Ultrafast Spectroscopy

Cited by 315 publications

References 59 publications

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

EFFECT OF CHLORIDE IONS ON THE STRUCTURAL, OPTICAL, MORPHOLOGICAL, AND ELECTROCHEMICAL PROPERTIES OF Cu2O FILMS ELECTRODEPOSITED ON FLUORINE-DOPED TIN OXIDE SUBSTRATE FROM A DMSO SOLUTION

Research Status and Development of Cu2O Thin Film Solar Cells

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Synthesis and Characterization of High-Photoactivity Electrodeposited Cu2O Solar Absorber by Photoelectrochemistry and Ultrafast Spectroscopy

Cited by 315 publications

References 59 publications

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

EFFECT OF CHLORIDE IONS ON THE STRUCTURAL, OPTICAL, MORPHOLOGICAL, AND ELECTROCHEMICAL PROPERTIES OF Cu2O FILMS ELECTRODEPOSITED ON FLUORINE-DOPED TIN OXIDE SUBSTRATE FROM A DMSO SOLUTION

Research Status and Development of Cu2O Thin Film Solar Cells

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Synthesis and Characterization of High-Photoactivity Electrodeposited Cu₂O Solar Absorber by Photoelectrochemistry and Ultrafast Spectroscopy