Distorted Asymmetric Cubic Nanostructure of Soluble Fullerene Crystals in Efficient Polymer:Fullerene Solar Cells
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- 作者：Youngkyoo Kim ; Jenny Nelson ; Tong Zhang ; Steffan Cook ; James R. Durrant ; Hwajeong Kim ; Jiho Park ; Minjung Shin ; Sungho Nam ; Martin Heeney ; Iain McCulloch ; Chang-Sik Ha ; Donal D. C. Bradley
- 刊名：ACS Nano
- 出版年：2009
- 出版时间：September 22, 2009
- 年：2009
- 卷：3
- 期：9
- 页码：2557-2562
- 全文大小：346K
- 年卷期：0
- ISSN：1936-086X
文摘
We found that 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C<sub>61sub> (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.