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Photoelectrochemical Conversion Processes

  • Stuart Licht
Part of the Springer Handbooks book series (SHB)

Abstract

Society’s electrical needs are largely continuous. However, clouds and darkness dictate that photovoltaic solar cells have an intermittent output. A photoelectrochemical solar cell (PEC ) can generate not only electrical but also electrochemical energy, and provide the basis for a system with an energy storage component. Sufficiently energetic insolation incident on semiconductors can drive electrochemical oxidation/reduction and generate chemical, electrical or electrochemical energy. Aspects include efficient dye sensitized or direct solar to electrical energy conversion, solar electrochemical synthesis (electrolysis), including water splitting to form hydrogen, environmental cleanup and solar energy storage cells. The PEC utilizes light to carry out an electrochemical reaction, converting light to both chemical and electrical energy. This fundamental difference of the photovoltaic (PV ) solar cell’s solid/solid interface, and the PEC’s solid/liquid interface has several ramifications in cell function and application. Energetic constraints imposed by single bandgap semiconductors have limited the demonstrated values of photoelectrochemical solar to electrical energy conversion efficiency to 16 %, and multiple bandgap cells can lead to significantly higher conversion efficiencies.

Photoelectrochemical systems may facilitate not only solar to electrical energy conversion , but have also led to investigations in solar photoelectrochemical production of fuels and photoelectrochemical detoxification of pollutants, and efficient solar thermal electrochemical production (STEP ) of metals, fuels, bleach and carbon capture [24.1].

Keywords

Solar Cell Carbon Capture Photoelectrochemical Cell Photovoltaic Solar Cell Electrical Energy Conversion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
CE

counter electrode

CPV

concentrator photovoltaic cell

IR

infrared

MBPEC

multiple bandgap photoelectrochemical solar cell

PEC

photoelectrochemical

PV

photovoltaic

SPE

semiconductor photoelectrode

STEP

solar thermal electrochemical production

UV

ultraviolet

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Stuart Licht
    • 1
  1. 1.Dept. ChemistryGeorge Washington UniversityWashingtonUSA

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