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American Chemical Society, ACS Nano, 9(3), p. 2557-2562, 2009

DOI: 10.1021/nn900798m

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

Journal article published in 2009 by Youngkyoo Kim, Jenny Nelson, Tong Zhang, Steffan Cook, James R. Durrant, Hwajeong Kim, Jiho Park, Minjung Shin, Sungho Nam, Martin Heeney ORCID, Iain McCulloch, Chang-Sik Ha, Donal D. C. Bradley
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

We found that 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C(61) (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 approximately 96 degrees , 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.