Isoindigo-based polymer photovoltaics: Modifying polymer molecular structures to control the nanostructural packing motif
SCIE
SCOPUS
- Title
- Isoindigo-based polymer photovoltaics: Modifying polymer molecular structures to control the nanostructural packing motif
- Authors
- Yu Jin Kim; Yun-Ji Lee; Yun-Hi Kim; Park, CE
- Date Issued
- 2016-07-21
- Publisher
- Royal Society of Chemistry
- Abstract
- Donor molecular structures, and their packing aspects in donor: acceptor active blends, play a crucial role in the photovoltaic performance of polymer solar cells. We systematically investigated a series of isoindigo-based donor polymers within the framework of a three-dimensional (3D) crystalline motif by modifying their chemical structures, thereby affecting device performances. Although our isoindigo-based polymer series contained polymers that differed only by their alkyl side chains and/or donating units, they showed quite different nanoscale morphological properties, which resulted in significantly different device efficiencies. Notably, blends of our isoindigo-based donor polymer systems with an acceptor compound, whereby the blends had more intermixed network morphologies and stronger face-on orientations of the polymer crystallites, provided better-performing photovoltaic devices. This behavior was analyzed using atomic force microscopy (AFM) and two-dimensional grazing incidence wide angle X-ray diffraction (2D-GIWAXD). To the best of our knowledge, no correlation has been reported previously between 3D nano-structural donor crystallites and device performances, particularly for isoindigo-based polymer systems.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37695
- DOI
- 10.1039/C6CP03273G
- ISSN
- 1463-9076
- Article Type
- Article
- Citation
- Physical Chemistry Chemical Physics, vol. 18, no. 27, page. 17957 - 17964, 2016-07-21
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