Inverted Organic Photovoltaic Cells on Lightweight, and Flexible Metal Foil Substrates

Abstract

In this program, we demonstrated high-efficiency small-molecule photovoltaic cells based on subphthalocyanine (SubPc)/C60 planar heterojunctions with an inverted layer sequence compared with conventional organic cells. The top-illuminated inverted device achieves a power conversion efficiency of 2.4 0.2%, or approximately 75% that of a conventional planar SubPc/C60 solar cell on indium-tin-oxide-coated glass (with a power efficiency of 3.3 0.1%). The open-circuit voltage of the inverted devices, optimized by tailoring the work function of the layers adjacent to the donor and acceptor, is comparable to the conventional cell. This work suggests that the inverted devices are promising for use on opaque and/or flexible surfaces.

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Document Details

Document Type
Technical Report
Publication Date
Mar 30, 2011
Accession Number
ADA546867

Entities

People

  • Stephen R. Forrest

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Cells
  • Department Of Defense
  • Electrons
  • Energy Bands
  • Energy Levels
  • Engineering
  • Films
  • Materials
  • Materials Science
  • Optical Properties
  • Organic Solar Cells
  • Small Molecules
  • Solar Cells
  • Students
  • Work Functions

Fields of Study

  • Materials science

Readers

  • Solar Photovoltaics and Thermoelectric Devices.