DataVXACS Energy LettersPaper
journal article·2021-02-12Open access

Relaxed Current Matching Requirements in Highly Luminescent Perovskite Tandem Solar Cells and Their Fundamental Efficiency Limits

Alan R. Bowman, Felix Lang, Yu-Hsien Chiang, Alberto Jiménez-Solano, Kyle Frohna, Giles E. Eperon, Edoardo Ruggeri, Mojtaba Abdi-Jalebi, Miguel Anaya, Bettina V. Lotsch, Samuel D. Stranks

ACS Energy Letters· Volume 6· Issue 2
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Source abstract

Abstract

Perovskite-based tandem solar cells are of increasing interest as they approach commercialization. Here we use experimental parameters from optical spectroscopy measurements to calculate the limiting efficiency of perovskite–silicon and all-perovskite two-terminal tandems, employing currently available bandgap materials, as 42.0% and 40.8%, respectively. We show luminescence coupling between subcells (the optical transfer of photons from the high-bandgap to low-bandgap subcell) relaxes current matching when the high-bandgap subcell is a luminescent perovskite. We calculate that luminescence coupling becomes important at charge trapping rates (≤106 s–1) already being achieved in relevant halide perovskites. Luminescence coupling increases flexibility in subcell thicknesses and tolerance to different spectral conditions. For maximal benefit, the high-bandgap subcell should have the higher short-circuit current under average spectral conditions. This can be achieved by reducing the bandgap of the high-bandgap subcell, allowing wider, unstable bandgap compositions to be avoided. Lastly, we visualize luminescence coupling in an all-perovskite tandem through cross-section luminescence imaging.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom

Max Planck Institute for Solid State Research, Nanochemistry Department, Heisenberg Strasse 1, 70569 Stuttgart, Germany

National Renewable Energy Laboratory, 16253 Denver West Parkway, Golden, Colorado 80401, United States

Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany

E-conversion, 85748 Garching, Germany

Department of Chemical Engineering & Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom

Funding

Engineering and Physical Sciences Research Council · Royal Society · Center for NanoScience, Ludwig-Maximilians-Universit?t M?nchen · H2020 Marie Sklodowska-Curie Actions · Max-Planck-Gesellschaft · H2020 European Research Council · Taiwan Cambridge Scholarship · Oppenheimer Studentship · George and Lilian Schiff Studentship · Cambridge Materials Limited · Cluster of Excellence e-conversion · European Union?s Horizon 2020 · Feodor Lynen programme · Robert Gardiner Scholarship · Cambridge Trust Scholarship · LDRD program · Winton Studentship

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