Please use this identifier to cite or link to this item:
|Title:||Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells||Authors:||Gasparini, Nicola
Emmott, Christopher J.M.
Hanifi, David A.
Ashraf, Raja Shahid
Röhr, Jason A.
Durrant, James R.
Brabec, Christoph J.
|Major Field of Science:||Engineering and Technology||Field Category:||Mechanical Engineering;Materials Engineering||Keywords:||Polymer Solar Cell;Bulk Heterojunction;Organic Photovoltaic||Issue Date:||1-Mar-2017||Source:||Nature Materials, 2017, vol. 16, no. 3, pp. 363-369||Volume:||16||Issue:||3||Start page:||363||End page:||369||Journal:||Nature materials||Abstract:||©The Author(s) 2017. Technological deployment of organic photovoltaic modules requires improvements in device light-conversion efficiency and stability while keeping material costs low. Here we demonstrate highly efficient and stable solar cells using a ternary approach, wherein two non-fullerene acceptors are combined with both a scalable and affordable donor polymer, poly(3-hexylthiophene) (P3HT), and a high-efficiency, low-bandgap polymer in a single-layer bulk-heterojunction device. The addition of a strongly absorbing small molecule acceptor into a P3HT-based non-fullerene blend increases the device efficiency up to 7.7 ± 0.1% without any solvent additives. The improvement is assigned to changes in microstructure that reduce charge recombination and increase the photovoltage, and to improved light harvesting across the visible region. The stability of P3HT-based devices in ambient conditions is also significantly improved relative to polymer:fullerene devices. Combined with a low-bandgap donor polymer (PBDTTT-EFT, also known as PCE10), the two mixed acceptors also lead to solar cells with 11.0 ± 0.4% efficiency and a high open-circuit voltage of 1.03 ± 0.01 V.||ISSN:||1476-4660||DOI:||10.1038/nmat4797||Rights:||© Macmillan Publishers Limited||Type:||Article||Affiliation :||University of Duisburg – Essen
Imperial College London
King Abdullah University of Science and Technology
IEK5-Photovoltaics, Forschungszentrum Jülich
Friedrich-Alexander University Erlangen-Nuremberg
|Appears in Collections:||Άρθρα/Articles|
checked on Nov 30, 2023
WEB OF SCIENCETM
checked on Nov 1, 2023
Page view(s) 1462
checked on Dec 1, 2023
Items in KTISIS are protected by copyright, with all rights reserved, unless otherwise indicated.