Single‐Junction Binary‐Blend Nonfullerene Polymer Solar Cells with 12.1% Efficiency
Top Cited Papers
- 10 March 2017
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 29 (18)
- https://doi.org/10.1002/adma.201700144
Abstract
A new fluorinated nonfullerene acceptor, ITIC-Th1, has been designed and synthesized by introducing fluorine (F) atoms onto the end-capping group 1,1-dicyanomethylene-3-indanone (IC). On the one hand, incorporation of F would improve intramolecular interaction, enhance the push–pull effect between the donor unit indacenodithieno[3,2-b]thiophene and the acceptor unit IC due to electron-withdrawing effect of F, and finally adjust energy levels and reduce bandgap, which is beneficial to light harvesting and enhancing short-circuit current density (JSC). On the other hand, incorporation of F would improve intermolecular interactions through CF···S, CF···H, and CF···π noncovalent interactions and enhance electron mobility, which is beneficial to enhancing JSC and fill factor. Indeed, the results show that fluorinated ITIC-Th1 exhibits redshifted absorption, smaller optical bandgap, and higher electron mobility than the nonfluorinated ITIC-Th. Furthermore, nonfullerene organic solar cells (OSCs) based on fluorinated ITIC-Th1 electron acceptor and a wide-bandgap polymer donor FTAZ based on benzodithiophene and benzotriazole exhibit power conversion efficiency (PCE) as high as 12.1%, significantly higher than that of nonfluorinated ITIC-Th (8.88%). The PCE of 12.1% is the highest in fullerene and nonfullerene-based single-junction binary-blend OSCs. Moreover, the OSCs based on FTAZ:ITIC-Th1 show much better efficiency and better stability than the control devices based on FTAZ:PC71BM (PCE = 5.22%).Keywords
Funding Information
- National Natural Science Foundation of China (91433114)
- Office of Naval Research (N000141410221)
- National Science Foundation (DMR‐1507249)
- National Natural Science Foundation of China (21504066, 21534003)
- U.S. Department of Energy (DE‐AC02‐05CH11231)
This publication has 60 references indexed in Scilit:
- Triarylamine: Versatile Platform for Organic, Dye-Sensitized, and Perovskite Solar CellsChemical Reviews, 2016
- Development of isomer-free fullerene bisadducts for efficient polymer solar cellsEnergy & Environmental Science, 2016
- Recent Advances in Bulk Heterojunction Polymer Solar CellsChemical Reviews, 2015
- Methanofullerenes, C60(CH2)n (n = 1, 2, 3), as Building Blocks for High-Performance Acceptors Used in Organic Solar CellsOrganic Letters, 2014
- Small molecule semiconductors for high-efficiency organic photovoltaicsChemical Society Reviews, 2012
- Polymer solar cellsNature Photonics, 2012
- Synthesis of Mono- and Bisadducts of Thieno-o-quinodimethane with C60 for Efficient Polymer Solar CellsOrganic Letters, 2012
- Fullerene derivative acceptors for high performance polymer solar cellsPhysical Chemistry Chemical Physics, 2010
- n‐Type Organic Semiconductors in Organic ElectronicsAdvanced Materials, 2010
- Synthesis of Conjugated Polymers for Organic Solar Cell ApplicationsChemical Reviews, 2009