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Bilayer order in a polycarbazole-conjugated polymer

Cited 90 time in Web of Science Cited 88 time in Scopus
Authors
Lu, Xinhui; Hlaing, Htay; Germack, David S.; Peet, Jeff; Jo, Won Ho; Andrienko, Denis; Kremer, Kurt; Ocko, Benjamin M.
Issue Date
2012-04
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS Vol.3 No.1790, pp. 1-7
Keywords
공학
Abstract
One of the best performing semiconducting polymers used in bulk heterojunction devices is PCDTBT, a polycarbazole derivative with solar-conversion efficiencies as high as 7.2%. Here we report the formation of bilayer ordering in PCDTBT, and postulate that this structural motif is a direct consequence of the polymer's molecular design. This bilayer motif is composed of a pair of backbones arranged side-to-side where the alkyl tails are on the outer side. This is in stark contrast to the monolayer ordering found in other conjugated polymers. The crystalline bilayer phase forms at elevated temperatures and persists after cooling to room temperature. The existence of bilayer ordering, along with its high-packing fraction of conjugated moieties, may guide the synthesis of new materials with improved optoelectronic properties.
ISSN
2041-1723
Language
English
URI
https://hdl.handle.net/10371/81078
DOI
https://doi.org/10.1038/ncomms1790
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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