Side-chain tunability of furan-containing low-band-gap polymers provides control of structural order in efficient solar cells
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
KAUST Solar Center (KSC)
Chemical Science Program
MetadataShow full item record
AbstractThe solution-processability of conjugated polymers in organic solvents has classically been achieved by modulating the size and branching of alkyl substituents appended to the backbone. However, these substituents impact structural order and charge transport properties in thin-film devices. As a result, a trade-off must be found between material solubility and insulating alkyl content. It was recently shown that the substitution of furan for thiophene in the backbone of the polymer PDPP2FT significantly improves polymer solubility, allowing for the use of shorter branched side chains while maintaining high device efficiency. In this report, we use PDPP2FT to demonstrate that linear alkyl side chains can be used to promote thin-film nanostructural order. In particular, linear side chains are shown to shorten π-π stacking distances between backbones and increase the correlation lengths of both π-π stacking and lamellar spacing, leading to a substantial increase in the efficiency of bulk heterojunction solar cells. © 2011 American Chemical Society.
SponsorsThis work was supported in part by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, the Center for Advanced Molecular Photovoltaics (CAMP) under Award No. KUS-C1-015-21, supported by King Abdullah University of Science and Technology (KAUST), and the Frechet "various gifts" fund for the support of research in new materials. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource user facility, operated on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.
PublisherAmerican Chemical Society (ACS)
- Incorporation of furan into low band-gap polymers for efficient solar cells.
- Authors: Woo CH, Beaujuge PM, Holcombe TW, Lee OP, Fréchet JM
- Issue date: 2010 Nov 10
- Superiority of branched side chains in spontaneous nanowire formation: exemplified by poly(3-2-methylbutylthiophene) for high-performance solar cells.
- Authors: Chen HC, Wu IC, Hung JH, Chen FJ, Chen IW, Peng YK, Lin CS, Chen CH, Sheng YJ, Tsao HK, Chou PT
- Issue date: 2011 Apr 18
- Self-assembly of thiophene- and furan-appended methanofullerenes with poly(3-hexylthiophene) in organic solar cells.
- Authors: Troshin PA, Khakina EA, Egginger M, Goryachev AE, Troyanov SI, Fuchsbauer A, Peregudov AS, Lyubovskaya RN, Razumov VF, Sariciftci NS
- Issue date: 2010 Mar 22
- Linear side chains in benzo[1,2-b:4,5-b']dithiophene-thieno[3,4-c]pyrrole-4,6-dione polymers direct self-assembly and solar cell performance.
- Authors: Cabanetos C, El Labban A, Bartelt JA, Douglas JD, Mateker WR, Fréchet JM, McGehee MD, Beaujuge PM
- Issue date: 2013 Mar 27
- Dependence of crystallite formation and preferential backbone orientations on the side chain pattern in PBDTTPD polymers.
- Authors: El Labban A, Warnan J, Cabanetos C, Ratel O, Tassone C, Toney MF, Beaujuge PM
- Issue date: 2014 Nov 26