Distorted Asymmetric Cubic Nanostructure of Soluble Fullerene Crystals in Efficient Polymer:Fullerene Solar Cells

We found that 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61 (PCBM) molecules make a distorted asymmetric body-centered cubic crystal nanostructure in the bulk heterojunction films of reigoregular poly(3-hexylthiophene) and PCBM. The wider angle of distortion in the PCBM nanocrystals was ∼96°, which...

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Published inACS nano Vol. 3; no. 9; pp. 2557 - 2562
Main Authors Kim, Youngkyoo, Nelson, Jenny, Zhang, Tong, Cook, Steffan, Durrant, James R, Kim, Hwajeong, Park, Jiho, Shin, Minjung, Nam, Sungho, Heeney, Martin, McCulloch, Iain, Ha, Chang-Sik, Bradley, Donal D. C
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 22.09.2009
Subjects
Crystallization
Fullerenes - chemistry
Microscopy, Electron, Transmission
Nanostructures - chemistry
Polymers - chemistry
Solar Energy
Solubility
Spectrum Analysis
Temperature
Thiophenes - chemistry
polymer solar cells
soluble fullerene
Raman scattering
asymmetric nanostructure
field emission transmission electron microscopy
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Summary:We found that 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61 (PCBM) molecules make a distorted asymmetric body-centered cubic crystal nanostructure in the bulk heterojunction films of reigoregular poly(3-hexylthiophene) and PCBM. The wider angle of distortion in the PCBM nanocrystals was ∼96°, which can be assigned to the influence of the attached side group to the fullerene ball of PCBM to bestow solubility. Atom concentration analysis showed that after thermal annealing the PCBM nanocrystals do preferentially distribute above the layer of P3HT nanocrystals inside devices.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn900798m