A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting

Khaselev, O.; Turner, John A.

doi:10.1126/science.280.5362.425

Cited by 2,127 publications

(1,575 citation statements)

References 18 publications

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“…These systems can increase the photopotential generated with a solar absorption across a broader spectrum, achieving higher solar‐to‐hydrogen efficiencies. In an early example, Khaselev and Turner pioneered monolithic tandem photovoltaic‐PEC cells using GaAs and GaInP 2 to achieve a benchmark 12.4% solar‐to‐hydrogen efficiency 189. Later, Bradley et al modified the surface of GaInP 2 with phosphonic acids to shift the band edge alignment, closer to the desired overlap with the water redox potentials.…”

Section: Photovoltaic‐integrated Photoelectrochemical Water Splittingmentioning

confidence: 99%

Recent Progress in Energy‐Driven Water Splitting

et al. 2017

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Hydrogen is readily obtained from renewable and non‐renewable resources via water splitting by using thermal, electrical, photonic and biochemical energy. The major hydrogen production is generated from thermal energy through steam reforming/gasification of fossil fuel. As the commonly used non‐renewable resources will be depleted in the long run, there is great demand to utilize renewable energy resources for hydrogen production. Most of the renewable resources may be used to produce electricity for driving water splitting while challenges remain to improve cost‐effectiveness. As the most abundant energy resource, the direct conversion of solar energy to hydrogen is considered the most sustainable energy production method without causing pollutions to the environment. In overall, this review briefly summarizes thermolytic, electrolytic, photolytic and biolytic water splitting. It highlights photonic and electrical driven water splitting together with photovoltaic‐integrated solar‐driven water electrolysis.

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Section: Photovoltaic‐integrated Photoelectrochemical Water Splittingmentioning

confidence: 99%

Recent Progress in Energy‐Driven Water Splitting

et al. 2017

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“…12, 13 Another approach towards overcoming these challenges is to couple appropriate combinations of materials. 6,8,14,15, 25 For example, the unsuitable band edge position of WO 3 and Fe 2 O 3 can be overcome by coupling them in tandem to a photovoltaic device (Fig. 1).…”

Section: Solid State Catalystsmentioning

confidence: 99%

Molecular water-oxidation catalysts for photoelectrochemical cells

et al. 2009

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Photoelectrochemical cells that efficiently split water into oxygen and hydrogen, "the fuel of the future", need to combine robust water oxidation catalysts at the anode (2H(2)O -> O-2 + 4H(+) + 4e(-)) with hydrogen reduction catalysts at the cathode (2H(+) + 2e(-) -> H-2). Both sets of catalysts will, ideally, operate at low overpotentials and employ light-driven or light-assisted processes. In this Perspective article, we focus on significant efforts to develop solid state materials and molecular coordination complexes as catalyst for water oxidation. We briefly review the field with emphasis on the various molecular catalysts that have been developed and then examine the activity of molecular catalysts in water oxidation following their attachment to conducting electrodes. For such molecular species to be useful in a solar water-splitting device it is preferable that they are securely and durably affixed to an electrode surface. We also consider recent developments aimed at combining the action of molecular catalysts with light absorption so that light driven water oxidation may be achieved. Photoelectrochemical cells that efficiently split water into oxygen and hydrogen, "the fuel of the future", need to combine robust water oxidation catalysts at the anode (2H 2 O → O 2 + 4H + + 4e -) with hydrogen reduction catalysts at the cathode (2H + + 2e -→ H 2 ). Both sets of catalysts will, ideally, operate at low overpotentials and employ light-driven or light-assisted processes. In this Perspective article, we focus on significant efforts to develop solid state materials and molecular coordination complexes as catalyst for water oxidation. We briefly review the field with emphasis on the various molecular catalysts that have been developed and then examine the activity of molecular catalysts in water oxidation following their attachment to conducting electrodes. For such molecular species to be useful in a solar water-splitting device it is preferable that they are securely and durably affixed to an electrode surface. We also consider recent developments aimed at combining the action of molecular catalysts with light absorption so that light driven water oxidation may be achieved.

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“…This is important for water splitting cells, which require open circuit voltages in excess of 1.23 V. 6−10 Most of the tandem junctions studied to date consist of well-defined interfaces fabricated by vapor deposition techniques. 11−13 For example, Shaner et al reported a n-p(+)-Si/n-WO 3 microwire junction obtained by successive vacuum deposition of BCl 3 to achieve Si p-doping, DC sputter coating of an ITO ohmic contact, and electrodeposition of n-WO 3 , followed by annealing at 400°C for 2 h. The device supported overall water splitting with 0.0019% solar to hydrogen (STH) efficiency. 12 Recently, there is also increasing interest in tandem junctions formed between suspended semiconductor particles.…”

Section: ■ Introductionmentioning

confidence: 99%

Photochemical Charge Separation at Particle Interfaces: The n-BiVO₄–p-Silicon System

Yang

Wang

Zhao

et al. 2015

ACS Appl. Mater. Interfaces

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ABSTRACT:The charge transfer properties of interfaces are central to the function of photovoltaic and photoelectrochemical cells and photocatalysts. Here we employ surface photovoltage spectroscopy (SPS) to study photochemical charge transfer at a p-silicon/n-BiVO 4 particle interface. Particle films of BiVO 4 on an aluminum-doped p-silicon wafer were obtained by drop-coating particle suspensions followed by thermal annealing at 353 K. Photochemical charge separation of the films was probed as a function of layer thickness and illumination intensity, and in the presence of methanol as a sacrificial electron donor. Electron injection from the BiVO 4 into the psilicon is clearly observed to occur and to result in a maximum photovoltage of 150 mV for a 1650 nm thick film under 0.3 mW cm −2 illumination at 3.5 eV. This establishes the BiVO 4 −p-Si interface as a tandem-like junction. Charge separation in the BiVO 4 film is limited by light absorption and by slow electron transport to the Si interface, based on time-dependent SPS measurements. These problems need to be overcome in functional tandem devices for photoelectrochemical water oxidation.

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A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting

Cited by 2,127 publications

References 18 publications

Recent Progress in Energy‐Driven Water Splitting

Recent Progress in Energy‐Driven Water Splitting

Molecular water-oxidation catalysts for photoelectrochemical cells

Photochemical Charge Separation at Particle Interfaces: The n-BiVO₄–p-Silicon System

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A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting

Cited by 2,127 publications

References 18 publications

Recent Progress in Energy‐Driven Water Splitting

Recent Progress in Energy‐Driven Water Splitting

Molecular water-oxidation catalysts for photoelectrochemical cells

Photochemical Charge Separation at Particle Interfaces: The n-BiVO4–p-Silicon System

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Photochemical Charge Separation at Particle Interfaces: The n-BiVO₄–p-Silicon System