Graphene oxide interlayers for robust, high-efficiency organic photovoltaics

Ian P. Murray, Sylvia J. Lou, Laura J. Cote, Stephen Loser, Cameron J. Kadleck, Tao Xu, Jodi M. Szarko, Brian S. Rolczynski, James E. Johns, Jiaxing Huang, Luping Yu, Lin X. Chen, Tobin J. Marks, Mark C. Hersam

Research output: Contribution to journalArticle

145 Citations (Scopus)

Abstract

Organic photovoltaic (OPV) materials have recently garnered significant attention as enablers of high power conversion efficiency (PCE), low-cost, mechanically flexible solar cells. Nevertheless, further understanding-based materials developments will be required to achieve full commercial viability. In particular, the performance and durability of many current generation OPVs are limited by poorly understood interfacial phenomena. Careful analysis of typical OPV architectures reveals that the standard electron-blocking layer, poly-3,4-ethylenedioxy-thiophene:poly(styrene sulfonate) (PEDOT:PSS), is likely a major factor limiting the device durability and possibly performance. Here we report that a single layer of electronically tuned graphene oxide is an effective replacement for PEDOT:PSS and that it significantly enhances device durability while concurrently templating a performance-optimal active layer π-stacked face-on microstructure. Such OPVs based on graphene oxide exhibit PCEs as high as 7.5% while providing a 5× enhancement in thermal aging lifetime and a 20× enhancement in humid ambient lifetime versus analogous PEDOT:PSS-based devices.

Original languageEnglish
Pages (from-to)3006-3012
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume2
Issue number24
DOIs
Publication statusPublished - Dec 15 2011

Keywords

  • Energy Conversion and Storage

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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    Murray, I. P., Lou, S. J., Cote, L. J., Loser, S., Kadleck, C. J., Xu, T., Szarko, J. M., Rolczynski, B. S., Johns, J. E., Huang, J., Yu, L., Chen, L. X., Marks, T. J., & Hersam, M. C. (2011). Graphene oxide interlayers for robust, high-efficiency organic photovoltaics. Journal of Physical Chemistry Letters, 2(24), 3006-3012. https://doi.org/10.1021/jz201493d