Boron subphthalocyanine chloride as an electron acceptor for high-voltage fullerene-free organic photovoltaics

Nicola Beaumont, Sang Wan Cho, Paul Sullivan, David Newby, Kevin E. Smith, Tim S. Jones

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

High-efficiency fullerene-free single-heterojunction (SHJ) organic photovoltaic (OPV) cells consisting of tetracene (Tc) as a typical donor material and boron subphthalocyanine chloride (SubPc) as an acceptor material are reported. Cells containing SubPc as a direct replacement for C 60 exhibit an ∼60% improvement in open circuit voltage (V oc) achieving a maximum V oc of 1.24 V, which is amongst the highest values acheived to date for SHJ devices. This resulted in an overall improvement of ∼60% in power conversion efficiency from 1.8%, for Tc/C 60 cells, to 2.9% for Tc/SubPc. The OPV device results are complemented by soft X-ray photoelectron spectroscopy (PES) measurements of the interfacial energetics of both systems. The results demonstrate that SubPc shows considerable promise as an electron acceptor material for future cell designs.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalAdvanced Functional Materials
Volume22
Issue number3
DOIs
Publication statusPublished - 2012 Feb 8

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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