Efficient inverted quasi-bilayer organic solar cells fabricated by using non-halogenated solvent processes

Jung Hao Chang, Hsiao Fang Wang, Wei Chieh Lin, Kai Ming Chiang, Kuan Chen Chen, Wei Ching Huang, Zheng Yu Huang, Hsin Fei Meng, Rong Ming Ho, Hao Wu Lin

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Here we demonstrate the fabrication of novel, "quasi-bilayer" inverted organic photovoltaic devices using halogen-free solvents. The inferior solubility of pristine fullerene in non-halogenated solvents was used to control the interpenetration of upper polymeric donor layers with bottom fullerene layers. Notably, island-like nano-morphologies were revealed by AFM, SEM, TEM, cross-sectional TEM images and PL quenching measurement. Correlation between device performance, thin-film nano-morphology and ac impedance was observed. High efficiencies of 6.55% and 7.15% were observed for PBDTTT-C-T and PTB7 cells, respectively. These results demonstrate that this novel process not only offers an effective new method to control the morphology of solar active layers but, more importantly, could also be applied to a wide range of current material systems to produce efficient devices that comply with the non-toxic halogen-free requirement. This journal is

Original languageEnglish
Pages (from-to)13398-13406
Number of pages9
JournalJournal of Materials Chemistry A
Volume2
Issue number33
DOIs
Publication statusPublished - 2014 Sep 7
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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