Improved Charge Transport and Reduced Nonradiative Energy Loss Enable Over 16% Efficiency in Ternary Polymer Solar Cells
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- 11 July 2019
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 31 (36), 1902302
- https://doi.org/10.1002/adma.201902302
Abstract
Recent advances in the material design and synthesis of nonfullerene acceptors (NFAs) have revealed a new landscape for polymer solar cells (PSCs) and have boosted the power conversion efficiencies (PCEs) to over 15%. Further improvements of the photovoltaic performance are a significant challenge in NFA-PSCs based on binary donor:acceptor blends. In this study, ternary PSCs are fabricated by incorporating a fullerene derivative, PC61BM, into a combination of a polymer donor (PBDB-TF) and a fused-ring NFA (Y6) and a very high PCE of 16.5% (certified as 16.2%) is recorded. Detailed studies suggest that the loading of PC61BM into the PBDB-TF:Y6 blend can not only enhance the electron mobility but also can increase the electroluminescence quantum efficiency, leading to balanced charge transport and reduced nonradiative energy losses simultaneously. This work suggests that utilizing the complementary advantages of fullerene and NFAs is a promising way to finely tune the detailed photovoltaic parameters and further improve the PCEs of PSCs.Keywords
Funding Information
- National Natural Science Foundation of China (21835006, 91633301, 51673201, 21805287, 21734008)
- Chinese Academy of Sciences (XDB12030200, KJZD‐EW‐J01)
- Youth Innovation Promotion Association of the Chinese Academy of Sciences (2018043)
This publication has 61 references indexed in Scilit:
- Polymer solar cells with enhanced fill factorsNature Photonics, 2013
- Organic Solar Cells beyond One Pair of Donor–Acceptor: Ternary Blends and MoreThe Journal of Physical Chemistry Letters, 2013
- A New Approach for Probing the Mobility and Lifetime of Photogenerated Charge Carriers in Organic Solar Cells Under Real Operating ConditionsAdvanced Materials, 2012
- Techniques for characterization of charge carrier mobility in organic semiconductorsJournal of Polymer Science Part B: Polymer Physics, 2012
- On the morphology of polymer‐based photovoltaicsJournal of Polymer Science Part B: Polymer Physics, 2012
- The Role of Driving Energy and Delocalized States for Charge Separation in Organic SemiconductorsScience, 2012
- The Energy of Charge‐Transfer States in Electron Donor–Acceptor Blends: Insight into the Energy Losses in Organic Solar CellsAdvanced Functional Materials, 2009
- Charge extraction analysis of charge carrier densities in a polythiophene/fullerene solar cell: Analysis of the origin of the device dark currentApplied Physics Letters, 2008
- Reciprocity relation between photovoltaic quantum efficiency and electroluminescent emission of solar cellsPhysical Review B, 2007
- Extraction Current Transients: New Method of Study of Charge Transport in Microcrystalline SiliconPhysical Review Letters, 2000