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

Ahmad R. Kirmani, Graham H. Carey, Maged Abdelsamie, Buyi Yan, Dongkyu Cha, Lisa R. Rollny, Xiaoyu Cui, Edward H. Sargent, Aram Amassian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 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.

Original languageEnglish (US)
Pages (from-to)4717-4723
Number of pages7
JournalAdvanced Materials
Volume26
Issue number27
DOIs
StatePublished - Jul 16 2014

Keywords

  • colloidal quantum dots
  • ligand exchange
  • roll-to-roll processing
  • thin films

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

Fingerprint

Dive into the research topics of 'Effect of solvent environment on colloidal-quantum-dot solar-cell manufacturability and performance'. Together they form a unique fingerprint.

Cite this