Effect of solvent environment on colloidal-quantum-dot solar-cell manufacturability and performance

Ahmad R. Kirmani, Graham H. Carey, Maged Abdelsamie, Buyi Yan, Dong Kyu Cha, Lisa R. Rollny, Xiaoyu Cui, E. H. Sargent, Aram Amassian

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The absorbing layer in state-of-the-art colloidal quantum-dot solar cells is fabricated using a tedious layer-by-layer process repeated ten times. It is now shown that methanol, a common exchange solvent, is the main culprit, as extended exposure leaches off the surface halide passivant, creating carrier trap states. Use of a high-dipole-moment aprotic solvent eliminates this problem and is shown to produce state-of-the-art devices in far fewer steps. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)4717-4723
Number of pages7
JournalAdvanced Materials
Volume26
Issue number27
DOIs
StatePublished - Jun 4 2014

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Mechanical Engineering

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