dc.contributor.author	Ellis, David S.
dc.contributor.author	Piekner, Yifat
dc.contributor.author	Grave, Daniel A.
dc.contributor.author	Schnell, Patrick
dc.contributor.author	Rothschild, Avner
dc.date.accessioned	2022-01-31T11:52:13Z
dc.date.available	2022-01-31T11:52:13Z
dc.date.issued	2022-01-05
dc.date.updated	2022-01-19T09:18:33Z
dc.description.abstract	In this paper we review some of the considerations and potential sources of error when conducting Incident Photon to Current Efficiency (IPCE) measurements, with focus on photoelectrochemical (PEC) cells for water splitting. The PEC aspect introduces challenges for accurate measurements often not encountered in dry PV cells. These can include slow charge transfer dynamics and, depending on conditions (such as a white light bias, which is important for samples with non-linear response to light intensity), possible composition changes, mostly at the surface, that a sample may gradually undergo as a result of chemical interactions with the aqueous electrolyte. These can introduce often-overlooked dependencies related to the timing of the measurement, such as a slower measurement requirement in the case of slow charge transfer dynamics, to accurately capture the steady-state response of the system. Fluctuations of the probe beam can be particularly acute when a Xe lamp with monochromator is used, and longer scanning times also allow for appreciable changes in the sample environment, especially when the sample is under realistically strong white light bias. The IPCE measurement system and procedure need to be capable of providing accurate measurements under specific conditions, according to sample and operating requirements. To illustrate these issues, complications, and solution options, we present example measurements of hematite photoanodes, leading to the use of a motorized rotating mirror stage to solve the inherent fluctuation and drift-related problems. For an example of potential pitfalls in IPCE measurements of metastable samples, we present measurements of BiVO4 photoanodes, which had changing IPCE spectral shapes under white-light bias.	en
dc.identifier.eissn	2296-598X
dc.identifier.uri	https://depositonce.tu-berlin.de/handle/11303/16226
dc.identifier.uri	http://dx.doi.org/10.14279/depositonce-15001
dc.language.iso	en	en
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	en
dc.subject.ddc	540 Chemie und zugeordnete Wissenschaften	de
dc.subject.other	IPCE	en
dc.subject.other	EQE	en
dc.subject.other	photoelectrochemical	en
dc.subject.other	device characterisation	en
dc.subject.other	measurement technique	en
dc.title	Considerations for the Accurate Measurement of Incident Photon to Current Efficiency in Photoelectrochemical Cells	en
dc.type	Article	en
dc.type.version	publishedVersion	en
dcterms.bibliographicCitation.articlenumber	726069	en
dcterms.bibliographicCitation.doi	10.3389/fenrg.2021.726069	en
dcterms.bibliographicCitation.journaltitle	Frontiers in Energy Research	en
dcterms.bibliographicCitation.originalpublishername	Frontiers	en
dcterms.bibliographicCitation.originalpublisherplace	Lausanne	en
dcterms.bibliographicCitation.volume	9	en
tub.accessrights.dnb	free	en
tub.affiliation	Fak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Technische Chemie	de
tub.affiliation.faculty	Fak. 2 Mathematik und Naturwissenschaften	de
tub.affiliation.group	FG Technische Chemie	de
tub.affiliation.institute	Inst. Chemie	de
tub.publisher.universityorinstitution	Technische Universität Berlin	en

Considerations for the Accurate Measurement of Incident Photon to Current Efficiency in Photoelectrochemical Cells

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