An Integrated Device View on Photo-Electrochemical Solar-Hydrogen Generation

Miguel A. Modestino, Sophia Haussener

Research output: Contribution to journalArticlepeer-review


Devices that directly capture and store solar energy have the potential to significantly increase the share of energy from intermittent renewable sources. Photo-electrochemical solar-hydrogen generators could become an important contributor, as these devices can convert solar energy into fuels that can be used throughout all sectors of energy. Rather than focusing on scientific achievement on the component level, this article reviews aspects of overall component integration in photo-electrochemical water-splitting devices that ultimately can lead to deployable devices. Throughout the article, three generalized categories of devices are considered with different levels of integration and spanning the range of complete integration by one-material photo-electrochemical approaches to complete decoupling by photovoltaics and electrolyzer devices. By using this generalized framework, we describe the physical aspects, device requirements, and practical implications involved with developing practical photo-electrochemical water-splitting devices. Aspects reviewed include macroscopic coupled multiphysics device models, physical device demonstrations, and economic and life cycle assessments, providing the grounds to draw conclusions on the overall technological outlook.

Original languageEnglish (US)
Pages (from-to)13-34
Number of pages22
JournalAnnual Review of Chemical and Biomolecular Engineering
StatePublished - Jul 24 2015


  • photo-electrochemistry
  • solar devices
  • solar fuels
  • solar water splitting

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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