Modification of nanomorphology in polymer/fullerene blends-route toward high efficiency polymer solar cells

Yang Yang, Gang Li, Vishal Shrotriya, Yan Yao, Hsiang Yu Chen, Srinivas Sista

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Extensive research is going into polymer solar cells because of their advantage of ease of fabrication, low cost, ability to make large area devices and mechanical flexibility. Optimizing the morphology on a molecular level is essential for achieving high performance polymer solar cells. Optimal nanomorphology leads to optimized exciton dissociation efficiency which is determined by the donor/acceptor interface area and optimal charge transport efficiency through percolating pathways for carriers. In this presentation, we discuss three strategies to manipulate the nanomorphology of regioregular poly(3-hexylthiophene) (rr-P3HT): [6,6]phenyl-C61-butyric acid methyl ester (PCBM) blends viz. thermal annealing, solvent annealing and mixed solvent approach, all of which lead to improved photovoltaic performance. It has been shown that all the three strategies lead to better ordering of the P3HT domains and hence good polymer crystallinity. The effect of these strategies on the blend morphology, polymer crystallinity, absorption and charge carrier mobility will be discussed and will be related to the photovoltaic performance of the device.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - 22 Mar 2009
Externally publishedYes
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: 22 Mar 200926 Mar 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727


Conference237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Country/TerritoryUnited States
CitySalt Lake City, UT

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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