Immiscible solvents enabled nanostructure formation for efficient polymer photovoltaic cells

Dong Hyun Lee, Yang Michael Yang, Jingbi You, Eric Richard, Gang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


Organic photovoltaics (OPVs) fabricated via solution processing are an attractive way to realize low cost solar energy harvesting. Bulk heterojunction (BHJ) devices are the most successful design, but their morphology is less controllable. In this manuscript, we describe a simple approach to realize 'ordered' BHJ morphology using two immiscible solvents with different boiling point and a quasi-bilayer approach. Tunable fine structures were demonstrated in poly(3-hexylthiophene) (P3HT) and [6,6]-Phenyl C61 butyric acid methyl ester (PCBM) model systems, and the devices with optimized fine structure showed a 33% efficiency enhancement compared to those with a planar bilayer structure.
Original languageEnglish
Article number295401
Issue number29
Publication statusPublished - 25 Jul 2014
Externally publishedYes


  • immiscible solvent
  • morphology
  • organic solar cell
  • quasi-bilayer

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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