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https://hdl.handle.net/20.500.14279/14099
Τίτλος: | Robust nonfullerene solar cells approaching unity external quantum efficiency enabled by suppression of geminate recombination | Συγγραφείς: | Tan, Ching Hong Gasparini, Nicola McCulloch, Iain Durrant, James R. Brabec, Christoph J. Hamid, Zeinab Song, Xin Wadsworth, Andrew Baran, Derya Wehbe, Nimer Kirchartz, Thomas Neophytou, Marios Zhang, Weimin |
Major Field of Science: | Engineering and Technology | Field Category: | Mechanical Engineering;Materials Engineering | Λέξεις-κλειδιά: | Organic photovoltaics;Solar cells;Fullerenes | Ημερομηνία Έκδοσης: | 1-Δεκ-2018 | Πηγή: | Nature Communications, 2018, Vol. 9, No. 1 | Volume: | 9 | Issue: | 1 | Περιοδικό: | Nature Communications | Περίληψη: | Nonfullerene solar cells have increased their efficiencies up to 13%, yet quantum efficiencies are still limited to 80%. Here we report efficient nonfullerene solar cells with quantum efficiencies approaching unity. This is achieved with overlapping absorption bands of donor and acceptor that increases the photon absorption strength in the range from about 570 to 700 nm, thus, almost all incident photons are absorbed in the active layer. The charges generated are found to dissociate with negligible geminate recombination losses resulting in a short-circuit current density of 20 mA cm -2 along with open-circuit voltages >1 V, which is remarkable for a 1.6 eV bandgap system. Most importantly, the unique nano-morphology of the donor:acceptor blend results in a substantially improved stability under illumination. Understanding the efficient charge separation in nonfullerene acceptors can pave the way to robust and recombination-free organic solar cells. | ISSN: | 20411723 | DOI: | 10.1038/s41467-018-04502-3 | Rights: | © The Author(s). | Type: | Article | Affiliation: | Cyprus University of Technology Friedrich-Alexander University Erlangen-Nuremberg Imperial College London King Abdullah University of Science and Technology University of Duisburg – Essen Swansea University |
Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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ROBUST NONFULLERENE.pdf | OPEN ACCESS | 1.36 MB | Adobe PDF | Δείτε/ Ανοίξτε |
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