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Title: Interplay of light transmission and catalytic exchange current in photoelectrochemical systems

We develop an analytic current-voltage expression for a variable junction photoelectrochemical (PEC) cell and use it to investigate and illustrate the influence of the optical and electrical properties of catalysts on the optoelectronic performance of PEC devices. Specifically, the model enables a simple, yet accurate accounting of nanostructured catalyst optical and electrical properties through incorporation of an optical transmission factor and active catalytic area factor. We demonstrate the utility of this model via the output power characteristics of an exemplary dual tandem solar cell with indium gallium phosphide and indium gallium arsenide absorbers with varying rhodium catalyst nanoparticle loading. The approach highlights the importance of considering interactions between independently optimized components for optimal PEC device design.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [2]
  1. Joint Center for Artificial Photosynthesis, California Institute of Technology, 1200 E. California Blvd., Pasadena, California 91125 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22310690
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CATALYSTS; CURRENTS; ELECTRIC CONTACTS; ELECTRIC POTENTIAL; ELECTRIC UTILITIES; ELECTRICAL PROPERTIES; ELECTROCHEMICAL CELLS; GALLIUM; GALLIUM ARSENIDES; INTERACTIONS; LIGHT TRANSMISSION; NANOSTRUCTURES; RHODIUM; SEMICONDUCTOR JUNCTIONS; SOLAR CELLS