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Efficient solar water splitting by enhanced charge separation in a bismuth vanadate-silicon tandem photoelectrode

The photoactivity of metal oxide electrodes for water splitting is often limited by poor charge separation. Abdi et al.improve the solar-to-hydrogen efficiency in a hybrid device that comprises a gradient-doped bismuth vanadate photoanode and a double-junction amorphous silicon tandem solar cell.

Fatwa F. Abdi
Lihao Han
Roel van de Krol
Research29 Jul 2013
Nature Communications

Volume: 4, P: 1-7
Photoelectrochemical water splitting cells at elevated pressure using BiVO₄ and platinized III-V semiconductor photoelectrodes

Many hydrogen applications require gas delivered under pressure. Here, the authors report that solar water-splitting devices can operate at up to 8 bar and show that the performance gains from elevated pressure depends critically on the choice of materials and device configuration.

Feng Liang
Heejung Kong
Fatwa F. Abdi
ResearchOpen Access13 Dec 2025
Nature Communications

Volume: 16, P: 1-14
Life cycle net energy assessment of sustainable H₂ production and hydrogenation of chemicals in a coupled photoelectrochemical device

Integrating green hydrogen production with the generation of valuable chemicals has the potential to increase the competitiveness of the system. Here, the authors quantitatively evaluate the energetic benefit of coupling hydrogen production with the hydrogenation of feedstocks in a photoelectrochemical device.

Xinyi Zhang
Michael Schwarze
Fatwa F. Abdi
ResearchOpen Access22 Feb 2023
Nature Communications

Volume: 14, P: 1-10
Author Correction: Extraction of mobile charge carrier photogeneration yield spectrum of ultrathin-film metal oxide photoanodes for solar water splitting

Daniel A. Grave
David S. Ellis
Avner Rothschild
Amendments and Corrections09 Sept 2021
Nature Materials

Volume: 20, P: 1579
Estimating the quasi-Fermi level of holes at the surface of semiconductor photoanodes using outer-sphere redox couples

Quasi-Fermi levels are crucial parameters for photoelectrochemical reactions. Here, the authors utilize outer-sphere redox reactions to estimate them at the surface of photoanodes, enabling dynamic monitoring of photoelectrode’s oxidation capability.

Yuu Shioiri
Keisuke Obata
Kazuhiro Takanabe
ResearchOpen Access17 Apr 2025
Nature Communications

Volume: 16, P: 1-10
Assessing elevated pressure impact on photoelectrochemical water splitting via multiphysics modeling

Solar water splitting devices, though often demonstrated at atmospheric pressure, need to deliver H₂ at high pressure for many applications. Here the authors use multiphysics model to evaluate the benefits and penalties of elevated pressure operation, identifying the optimum pressure range to enhance efficiency.

Feng Liang
Roel van de Krol
Fatwa F. Abdi
ResearchOpen Access10 Jun 2024
Nature Communications

Volume: 15, P: 1-13
Low-bias photoelectrochemical water splitting via mediating trap states and small polaron hopping

While photoelectrochemical water splitting produces fuel from solar energy, a large fraction of photoanode photoexcited charge carriers cannot be extracted efficiently at low bias voltages. Here, authors improve the charge transport in P-doped BiVO₄ by mediating polaron hopping and trap states.

Hao Wu
Lei Zhang
Yun Hau Ng
ResearchOpen Access20 Oct 2022
Nature Communications

Volume: 13, P: 1-12
Solar-driven upgrading of biomass by coupled hydrogenation using in situ (photo)electrochemically generated H₂

Green chemical transformations driven by renewable energies are imperative to realize a sustainable energy society. We demonstrate a coupled approach to hydrogenate biomass feedstock into valuable chemicals with high stability using hydrogen generated in situ in a (photo)electrochemical reactor.

Keisuke Obata
Michael Schwarze
Fatwa F. Abdi
ResearchOpen Access27 Sept 2023
Nature Communications

Volume: 14, P: 1-11
Hetero-type dual photoanodes for unbiased solar water splitting with extended light harvesting

Metal oxide semiconductors are promising photoelectrode materials for solar water splitting but their efficiency needs to be improved. Here, the authors report a hetero-type dual photoelectrode strategy in which two photoanodes of different band gaps are connected in parallel for extended light harvesting.

Jin Hyun Kim
Ji-Wook Jang
Jae Sung Lee
ResearchOpen Access14 Dec 2016
Nature Communications

Volume: 7, P: 1-9
Extraction of mobile charge carrier photogeneration yield spectrum of ultrathin-film metal oxide photoanodes for solar water splitting

Although the photogeneration yield spectrum is a key property for photoabsorbers in photovoltaic and photoelectrochemical cells, its characterization remains challenging. An empirical method to extract this parameter through quantum efficiency measurements of ultrathin films is proposed.

Daniel A. Grave
David S. Ellis
Avner Rothschild
Research19 Apr 2021
Nature Materials

Volume: 20, P: 833-840
Solar-driven electrolysis coupled with valuable chemical synthesis

Solar-driven electrolysis can produce value-added chemicals through less energy-intensive processes. This Review examines the fundamentals and economics of different electrochemical approaches powered directly or indirectly by sunlight and alternative reactions that replace O₂ evolution and integrate downstream utilization of H₂.

Kaijian Zhu
Xinyi Zhang
Fatwa F. Abdi
Reviews25 Jul 2025
Nature Reviews Clean Technology

Volume: 1, P: 621-637
Wafer-scale transfer route for top–down III-nitride nanowire LED arrays based on the femtosecond laser lift-off technique

Nursidik Yulianto
Andam Deatama Refino
Andreas Waag
ResearchOpen Access23 Apr 2021
Microsystems & Nanoengineering

Volume: 7, P: 1-15

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