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Efficient hybrid inorganic/organic tandem solar cells with tailored recombination contacts

  • In this work, the authors present a 7.5% efficient hybrid tandem solar cell with the bottom cell made of amorphous silicon and a Si-PCPDTBT:PC70BM bulk heterojunction top cell. Loss-free recombination contacts were realized by combing Al-doped ZnO with either the conducting polymer composite PEDOT:PSS or with a bilayer of ultrathin Al and MoO3. Optimization of these contacts results in tandem cells with high fill factors of 70% and an open circuit voltage close to the sum of those of the sub-cells. This is the best efficiency reported for this type of hybrid tandem cell so far. Optical and electrical device modeling suggests that the efficiency can be increased to similar to 12% on combining a donor polymer with suitable absorption onset with PCBM. We also describe proof-of-principle studies employing light trapping in hybrid tandem solar cells, suggesting that this device architecture has the potential to achieve efficiencies well above 12%. (C) 2014 Elsevier B.V. All rights reserved.

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Metadaten
Author:Steve AlbrechtGND, Bjorn Grootoonk, Sebastian Neubert, Steffen RolandORCiDGND, Jan Wordenweber, Matthias Meier, Rutger Schlatmann, Aad Gordijn, Dieter NeherORCiDGND
DOI:https://doi.org/10.1016/j.solmat.2014.04.020
ISSN:0927-0248 (print)
ISSN:1879-3398 (online)
Parent Title (English):Solar energy materials & solar cells : an international journal devoted to photovoltaic, photothermal, and photochemical solar energy conversion
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Year of first Publication:2014
Year of Completion:2014
Release Date:2017/03/27
Tag:Bulk heterojunction; Efficiency optimization; Hybrid solar cells; Organic solar cells; Tandem solar cells
Volume:127
Pagenumber:6
First Page:157
Last Page:162
Funder:BMBF project PVCOMB [FKZ 03IS2151D]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert