Title: Analysis of optical losses in a photoelectrochemical cell : a tool for precise absorptance estimation
Authors : Cendula, Peter
Steier, Ludmilla
Losio, Paolo Antonio
Grätzel, Michael
Schumacher, Jürgen O.
Published in : Advanced Functional Materials
Volume(Issue) : 28
Issue : 1
Pages : 1702768
Pages to: 1702768
Publisher / Ed. Institution : Wiley
Issue Date: 2018
License (according to publishing contract) : Licence according to publishing contract
Type of review: Not specified
Language : English
Subjects : Hydrogen generation; Photoelectrochemical cell; Optical absorption
Subject (DDC) : 530: Physics
621.04: Energy engineering
Abstract: Optical losses in a photoelectrochemical (PEC) cell account for a substantial part of solar‐to‐hydrogen conversion losses, but limited attention is paid to the detailed investigation of optical losses in PEC cells. In this work, an optical model of combined coherent and incoherent light propagation in all layers of the PEC cell based on spectroscopic measurements is presented. Specifically, photoelectrodes using transparent conductive substrates such as F:SnO2 coated with thin absorber films are focused. The optical model is verified for hematite photoanodes fabricated by atomic layer deposition and successfully used to determine wavelength‐dependent reflection, transmission, layer absorptances, and charge generation rates. Furthermore, the calculated absorptances enable 20–30% more accurate calculations of the absorbed photon‐to‐current efficiency of PEC cells. Our optical model is a powerful tool for the optimization of the optical performance of PEC cells focusing on single absorber or tandem configurations and represents a cornerstone of a complete (optical and electrical) model for PEC water splitting cells.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific Journal
DOI : 10.1002/adfm.201702768
ISSN: 1616-301X
URI: https://digitalcollection.zhaw.ch/handle/11475/5642
Appears in Collections:Publikationen School of Engineering

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