Rapid precipitation: An alternative to solvent casting for organic solar cells

Rajeev Dattani; Mark T.F. Telling; Carlos G. Lopez; Siva H. Krishnadasan; James H. Bannock; Anne E. Terry; John C. De Mello; João T. Cabral; Alisyn J. Nedoma

doi:10.1002/cphc.201402758

Rapid precipitation: An alternative to solvent casting for organic solar cells

Rajeev Dattani, Mark T.F. Telling, Carlos G. Lopez, Siva H. Krishnadasan, James H. Bannock, Anne E. Terry, John C. De Mello, João T. Cabral, Alisyn J. Nedoma

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Rapid precipitation, immersion of a liquid formulation into a nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly-3-hexylthiophene (P3HT), phenyl-C61-butyric acid methyl ester (PCBM), and chlorobenzene were processed into bulk samples by using two distinct routes: rapid precipitation and drop casting. The resulting structure, phases, and crystallinity were analyzed by using small-angle neutron scattering, X-ray diffraction, differential scanning calorimetry, and muon spin resonance. Rapid precipitation was found to induce a finely structured phase separation between PCBM and P3HT, with 65 wt % crystallinity in the P3HT phase. In contrast, solvent casting resulted in a mixed PCBM/P3HT phase with only 43 wt % P3HT crystallinity. The structural advantages conferred by rapid precipitation were shown to persist following intense thermal treatments.

Original language	English (US)
Pages (from-to)	1231-1238
Number of pages	8
Journal	ChemPhysChem
Volume	16
Issue number	6
DOIs	https://doi.org/10.1002/cphc.201402758
State	Published - Apr 27 2015

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry

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title = "Rapid precipitation: An alternative to solvent casting for organic solar cells",

abstract = "Rapid precipitation, immersion of a liquid formulation into a nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly-3-hexylthiophene (P3HT), phenyl-C61-butyric acid methyl ester (PCBM), and chlorobenzene were processed into bulk samples by using two distinct routes: rapid precipitation and drop casting. The resulting structure, phases, and crystallinity were analyzed by using small-angle neutron scattering, X-ray diffraction, differential scanning calorimetry, and muon spin resonance. Rapid precipitation was found to induce a finely structured phase separation between PCBM and P3HT, with 65 wt % crystallinity in the P3HT phase. In contrast, solvent casting resulted in a mixed PCBM/P3HT phase with only 43 wt % P3HT crystallinity. The structural advantages conferred by rapid precipitation were shown to persist following intense thermal treatments.",

author = "Rajeev Dattani and Telling, {Mark T.F.} and Lopez, {Carlos G.} and Krishnadasan, {Siva H.} and Bannock, {James H.} and Terry, {Anne E.} and {De Mello}, {John C.} and Cabral, {Jo{\~a}o T.} and Nedoma, {Alisyn J.}",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

year = "2015",

month = apr,

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doi = "10.1002/cphc.201402758",

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T2 - An alternative to solvent casting for organic solar cells

AU - Dattani, Rajeev

AU - Telling, Mark T.F.

AU - Lopez, Carlos G.

AU - Krishnadasan, Siva H.

AU - Bannock, James H.

AU - Terry, Anne E.

AU - De Mello, John C.

AU - Cabral, João T.

AU - Nedoma, Alisyn J.

PY - 2015/4/27

Y1 - 2015/4/27

N2 - Rapid precipitation, immersion of a liquid formulation into a nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly-3-hexylthiophene (P3HT), phenyl-C61-butyric acid methyl ester (PCBM), and chlorobenzene were processed into bulk samples by using two distinct routes: rapid precipitation and drop casting. The resulting structure, phases, and crystallinity were analyzed by using small-angle neutron scattering, X-ray diffraction, differential scanning calorimetry, and muon spin resonance. Rapid precipitation was found to induce a finely structured phase separation between PCBM and P3HT, with 65 wt % crystallinity in the P3HT phase. In contrast, solvent casting resulted in a mixed PCBM/P3HT phase with only 43 wt % P3HT crystallinity. The structural advantages conferred by rapid precipitation were shown to persist following intense thermal treatments.

AB - Rapid precipitation, immersion of a liquid formulation into a nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly-3-hexylthiophene (P3HT), phenyl-C61-butyric acid methyl ester (PCBM), and chlorobenzene were processed into bulk samples by using two distinct routes: rapid precipitation and drop casting. The resulting structure, phases, and crystallinity were analyzed by using small-angle neutron scattering, X-ray diffraction, differential scanning calorimetry, and muon spin resonance. Rapid precipitation was found to induce a finely structured phase separation between PCBM and P3HT, with 65 wt % crystallinity in the P3HT phase. In contrast, solvent casting resulted in a mixed PCBM/P3HT phase with only 43 wt % P3HT crystallinity. The structural advantages conferred by rapid precipitation were shown to persist following intense thermal treatments.

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JO - ChemPhysChem

JF - ChemPhysChem

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ER -

Rapid precipitation: An alternative to solvent casting for organic solar cells

Abstract

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