A combination of Al-doped ZnO and a conjugated polyelectrolyte interlayer for small molecule solution-processed solar cells with an inverted structure

J. Min, H. Zhang, T. Stubhan, Y.N. Luponosov, M. Kraft, S.A. Ponomarenko, T. Ameri, U. Scherf, C.J. Brabec

Research output: Contribution to journalArticlepeer-review

Abstract

We successfully demonstrate a smart strategy to use aluminum doped ZnO (AZO) and the thiophene-based conjugated polyelectrolyte P3TMAHT as an interfacial layer in small molecule solution-processed inverted solar cells. Modification of AZO with a thin P3TMAHT layer increases the photovoltaic properties of the inverted cell as a result of reduction in the work function of the cathode with well aligned frontier orbital energy levels for efficient charge transport and reduced surface recombination. The inverted device achieved ∼16% performance improvement dominantly by recapturing part of the V oc losses when going from conventional to the inverted architecture. In addition, the inverted device using the AZO/P3TMAHT interlayer shows improved device stability in air compared to conventional devices. © 2013 The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)11306-11311
Number of pages6
JournalJournal of Materials Chemistry A: materials for energy and sustainability
Volume1
Issue number37
DOIs
Publication statusPublished - 2013

Keywords

  • Aluminum-doped ZnO
  • Conjugated polyelectrolytes
  • Frontier orbital energies
  • Inverted architectures
  • Inverted solar cells
  • Photovoltaic property
  • Solution-processed
  • Surface recombinations
  • Molecules
  • Polyelectrolytes
  • Zinc oxide
  • Solar cells

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