期刊
NANO LETTERS
卷 13, 期 6, 页码 2522-2527出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl4005805
关键词
Polymer morphology; TEM; long-range order; high mobility polymer material
类别
资金
- National Science Foundation [DMR-0856060]
- UCSB Center for Scientific Computing NSF [CNS-0960316]
- Materials Research Laboratory an NSF MRSEC [DMR-1121053]
- NSF [DMR-1207549]
- Direct For Computer & Info Scie & Enginr [960316] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien [0856060] Funding Source: National Science Foundation
- Division Of Computer and Network Systems [960316] Funding Source: National Science Foundation
- Division Of Materials Research [0856060] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1207549] Funding Source: National Science Foundation
We directly image the rich nanoscale organization of the high performance, n-type polymer poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} (P(NDI2OD-T2)) using a combination of high-resolution transmission electron microscopy and scanning transmission electron microscopy. We demonstrate that it is possible to spatially resolve face-on lamella through the 2.4 nm alkyl stacking distance corresponding to the (100) reflection. The lamella locally transition between ordered and disordered states over a length scale on the order of 10 nm; however, the polymer backbones retain long-range correlations over length-scales approaching a micrometer. Moreover, we frequently observe overlapping structure implying a number of layers may exist thickness of the film (similar to 20 nm). The results provide a simple picture, a highly ordered lamella nanostructure entire film and ordered domains with overlapping layers providing additional interconnectivity, which unifies contradictory conclusions surrounding this remarkable, high-mobility material.
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