Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation

Handle URI:
http://hdl.handle.net/10754/623888
Title:
Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation
Authors:
Holovský, Jakub; De Wolf, Stefaan ( 0000-0003-1619-9061 ) ; Werner, Jérémie; Remeš, Zdeněk; Müller, Martin; Neykova, Neda; Ledinský, Martin; Černá, Ladislava; Hrzina, Pavel; Löper, Philipp; Niesen, Bjoern; Ballif, Christophe
Abstract:
Optical absorptance spectroscopy of polycrystalline CHNHPbI films usually indicates the presence of a PbI phase, either as a preparation residue or due to film degradation, but gives no insight on how this may affect electrical properties. Here, we apply photocurrent spectroscopy to both perovskite solar cells and coplanar-contacted layers at various stages of degradation. In both cases, we find that the presence of a PbI phase restricts charge-carrier transport, suggesting that PbI encapsulates CHNHPbI grains. We also find that PbI injects holes into the CHNHPbI grains, increasing the apparent photosensitivity of PbI. This phenomenon, known as modulation doping, is absent in the photocurrent spectra of solar cells, where holes and electrons have to be collected in pairs. This interpretation provides insights into the photogeneration and carrier transport in dual-phase perovskites.
KAUST Department:
KAUST Solar Center (KSC)
Citation:
Holovský J, De Wolf S, Werner J, Remeš Z, Müller M, et al. (2017) Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation. The Journal of Physical Chemistry Letters 8: 838–843. Available: http://dx.doi.org/10.1021/acs.jpclett.6b02854.
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry Letters
Issue Date:
25-Jan-2017
DOI:
10.1021/acs.jpclett.6b02854
Type:
Article
ISSN:
1948-7185
Sponsors:
The authors acknowledge financial support from Czech Science Foundation Project No. 17-26041Y, the Project KONNECT- 007 of the Czech Academy of Sciences, the Czech Ministry of Education, Youth and Sports Projects LM2015087 and CZ.02.1.01/0.0/0.0/15_003/0000464 Centre of Advanced Photovoltaics, and the Swiss National Science Foundation through Nanotera and PNR 70 program. We thank Prof. Roman Grill and Dr. Thomas Dittrich for fruitful discussions.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b02854
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorHolovský, Jakuben
dc.contributor.authorDe Wolf, Stefaanen
dc.contributor.authorWerner, Jérémieen
dc.contributor.authorRemeš, Zdeněken
dc.contributor.authorMüller, Martinen
dc.contributor.authorNeykova, Nedaen
dc.contributor.authorLedinský, Martinen
dc.contributor.authorČerná, Ladislavaen
dc.contributor.authorHrzina, Pavelen
dc.contributor.authorLöper, Philippen
dc.contributor.authorNiesen, Bjoernen
dc.contributor.authorBallif, Christopheen
dc.date.accessioned2017-05-31T11:23:11Z-
dc.date.available2017-05-31T11:23:11Z-
dc.date.issued2017-01-25en
dc.identifier.citationHolovský J, De Wolf S, Werner J, Remeš Z, Müller M, et al. (2017) Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation. The Journal of Physical Chemistry Letters 8: 838–843. Available: http://dx.doi.org/10.1021/acs.jpclett.6b02854.en
dc.identifier.issn1948-7185en
dc.identifier.doi10.1021/acs.jpclett.6b02854en
dc.identifier.urihttp://hdl.handle.net/10754/623888-
dc.description.abstractOptical absorptance spectroscopy of polycrystalline CHNHPbI films usually indicates the presence of a PbI phase, either as a preparation residue or due to film degradation, but gives no insight on how this may affect electrical properties. Here, we apply photocurrent spectroscopy to both perovskite solar cells and coplanar-contacted layers at various stages of degradation. In both cases, we find that the presence of a PbI phase restricts charge-carrier transport, suggesting that PbI encapsulates CHNHPbI grains. We also find that PbI injects holes into the CHNHPbI grains, increasing the apparent photosensitivity of PbI. This phenomenon, known as modulation doping, is absent in the photocurrent spectra of solar cells, where holes and electrons have to be collected in pairs. This interpretation provides insights into the photogeneration and carrier transport in dual-phase perovskites.en
dc.description.sponsorshipThe authors acknowledge financial support from Czech Science Foundation Project No. 17-26041Y, the Project KONNECT- 007 of the Czech Academy of Sciences, the Czech Ministry of Education, Youth and Sports Projects LM2015087 and CZ.02.1.01/0.0/0.0/15_003/0000464 Centre of Advanced Photovoltaics, and the Swiss National Science Foundation through Nanotera and PNR 70 program. We thank Prof. Roman Grill and Dr. Thomas Dittrich for fruitful discussions.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b02854en
dc.titlePhotocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradationen
dc.typeArticleen
dc.contributor.departmentKAUST Solar Center (KSC)en
dc.identifier.journalThe Journal of Physical Chemistry Lettersen
dc.contributor.institutionInstitute of Physics, Czech Academy of Sciences, V. V. I., Cukrovarnická 10, Prague, 162 00, Czech Republicen
dc.contributor.institutionFaculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, Prague, 166 27, Czech Republicen
dc.contributor.institutionPhotovoltaics and Thin-Film Electronics Laboratory, Institute of Microengineering (IMT), École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, Neuchâtel, 2000, Switzerlanden
kaust.authorDe Wolf, Stefaanen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.