3 years ago

Branched Hydrosilane Oligomers as Ideal Precursors for Liquid-Based Silicon-Film Deposition

Branched Hydrosilane Oligomers as Ideal Precursors for Liquid-Based Silicon-Film Deposition
Viktor Christopoulos, Thomas Lainer, Michael Haas, Harald Fitzek, Ana Torvisco, Lukas Schuh, Judith Radebner, Odo Wunnicke, Roland Fischer, Michael Holthausen, Harald Stueger, Gerald Kothleitner
Herein a convenient synthetic method to obtain 2,2,3,3-tetrasilyltetrasilane 3 and 2,2,3,3,4,4-hexasilylpentasilane 4 on a multigram scale is presented. Proton-coupled 29Si NMR spectroscopy and single-crystal X-ray crystallography enabled unequivocal structural assignment. Owing to their unique properties, which are reflected in their nonpyrophoric character on contact with air and their enhanced light absorption above 250 nm, 3 and 4 are valuable precursors for liquid-phase deposition (LPD) and the processing of thin silicon films. Amorphous silicon (a-Si:H) films of excellent quality were deposited starting from 3 and characterized by conductivity measurements, ellipsometry, optical microscopy, and Raman spectroscopy. Higher silanes with eight or more silicon atoms were synthesized on a multigram scale by a convenient synthetic method. Owing to their unique properties, including their nonpyrophoric nature when in contact with air and their enhanced light absorption above 250 nm, these silanes were found to be excellent precursors for the deposition of silicon films from solution (see picture).

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201707525

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.