Intensity-dependent PL Measurements Reveal the Contribution of Bulk, Interface and Surface Recombination Losses in Perovskite Solar Cells

Martin Stolterfoht^a, Max Grischek^a^,^b, Pietro Caprioglio^a^,^b, Christian M. Wolff^a, Emilio Gutierrez-Partida^a, Francisco Peña‐Camargo^a, Daniel Rothhardt^a, Shanshan Zhang^a, Meysam Raoufi^a, Jakob Wolansky^a, Mojtaba Abdi-Jalebi^c^,^d, Samuel D. Stranks^c, Steve Albrecht^b^,^e, Thomas Kirchartz^f^,^g, Dieter Neher^a

^aUniversity of Potsdam, Institute of Physics and Astronomy, Karl-Liebknecht-Str 24-25, Potsdam, 14476, Germany

^bHelmholtz-Zentrum Berlin für Materialien und Energie GmbH, Young Investigator Group Perovskite Tandem Solar Cells, Berlin, Germany

^cCavendish Laboratory, Department of Physics, University of Cambridge, UK, JJ Thomson Avenue, Cambridge, United Kingdom

^dInstitute for Materials Discovery, University College London, UK, Torrington Place, United Kingdom

^eFaculty IV – Electrical Engineering and Computer Science, Technical University Berlin, DE, Germany

^fInstitut für Energie- und Klimaforschung, Forschungszentrum Jülich GmbH, Germany, Wilhelm-Johnen-Straße, Jülich, Germany

^gUniversity of Duisburg-Essen and CENIDE, Faculty of Engineering, Duisburg, Germany

Online Meetups
Proceedings of Online Meetup: Origins of Electronic Defects in Halide Perovskites (EDHP)

Online, Spain, 2020 April 2nd - 2nd

Poster, Max Grischek, 026
Publication date: 1st April 2020

ePoster: View ePoster

Perovskite photovoltaic (PV) cells have demonstrated power conversion efficiencies (PCE) that are close to those of monocrystalline silicon cells; however, in contrast to silicon PV, perovskites are not limited by Auger recombination under 1‐sun illumination. Nevertheless, compared to GaAs and monocrystalline silicon PV, perovskite cells have significantly lower fill factors due to a combination of resistive and non‐radiative recombination losses. This necessitates a deeper understanding of the underlying loss mechanisms and in particular the ideality factor of the cell. By measuring the intensity dependence of the external open‐circuit voltage and the internal quasi‐Fermi level splitting (QFLS), the transport resistance‐free efficiency of the complete cell as well as the efficiency potential of any neat perovskite film with or without attached transport layers are quantified. Moreover, intensity‐dependent QFLS measurements on different perovskite compositions allows for disentangling of the impact of the interfaces and the perovskite surface on the non‐radiative fill factor and open‐circuit voltage loss. It is found that potassium‐passivated triple cation perovskite films stand out by their exceptionally high implied PCEs > 28%, which could be achieved with ideal transport layers. Finally, strategies are presented to reduce both the ideality factor and transport losses to push the efficiency to the thermodynamic limit.

Acknowledgements:

This work was in part funded by HyPerCells (a joint graduate school of the Potsdam University and the Helmholtz‐Zentrum Berlin) and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation): project number 423749265. S.D.S. acknowledges funding from the Royal Society and Tata Group (UF150033) and the Engineering and Physical Sciences Research Council (EP/R023980/1). M.A.‐J. acknowledges EPSRC, Cambridge Materials Limited and Wolfson College, University of Cambridge for their funding and technical support. M.G., P.C., S.A., and D.N. acknowledge funding from the Helmholtz Association via HI‐SCORE (Helmholtz International Research School). M.G., P.C., and S.A. acknowledge the Federal Ministry of Education and Research (BMBF) for funding of the Young Investigator Group Perovskite Tandem Solar Cells within the program “Materialforschung fuer die Energiewende” (grant no. 03SF0540). The authors thank Nandi Wu, Daniel Walter, and Klaus Weber from the Australian National University for help and fruitful discussions.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.