Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 5, 2019
Previous Article Next Article

Unassisted solar water splitting with 9.8% efficiency and over 100 h stability based on Si solar cells and photoelectrodes catalyzed by bifunctional Ni–Mo/Ni

Author affiliations

Abstract

Designing a highly efficient and stable photoelectrochemical (PEC) tandem cell for unassisted solar water splitting is considered a promising approach for large-scale solar energy storage. To date, various tandem device configurations have been reported. However, the achievement of a solar-to-hydrogen conversion efficiency (ηSTH) of 10% is still full of challenges, due to the incompatibility between the two photoelectrode materials. Here, we report a highly efficient and stable photovoltaic (PV)–PEC tandem device composed of a dual Si photoelectrode and two series-connected ordinary Si PV cells. The dual-photoelectrode device consists of an n+np+-Si photocathode and p+pn+-Si photoanode, which allow back illumination from the Si substrate, spatially and functionally decoupling the optical absorption and the catalytic activity. By further employing a Ni protective layer together with a bifunctional Ni–Mo catalyst for both the Si photocathode and photoanode, the PV–PEC tandem cell can perform spontaneous water splitting without any applied bias. A high ηSTH of 9.8% with a stability of over 100 h was achieved in alkaline solution under parallel AM 1.5G 1 sun illumination. This work essentially allows a modular independent optimization of each component which can enhance the efficiency and stability of the PV–PEC cells.

Graphical abstract: Unassisted solar water splitting with 9.8% efficiency and over 100 h stability based on Si solar cells and photoelectrodes catalyzed by bifunctional Ni–Mo/Ni

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Oct 2018, accepted on 22 Dec 2018 and first published on 24 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10165E
Citation: J. Mater. Chem. A, 2019,7, 2200-2209

  •   Request permissions

    Unassisted solar water splitting with 9.8% efficiency and over 100 h stability based on Si solar cells and photoelectrodes catalyzed by bifunctional Ni–Mo/Ni

    R. Fan, S. Cheng, G. Huang, Y. Wang, Y. Zhang, S. Vanka, G. A. Botton, Z. Mi and M. Shen, J. Mater. Chem. A, 2019, 7, 2200
    DOI: 10.1039/C8TA10165E

Search articles by author

Spotlight

Advertisements