Send to:

Choose Destination
See comment in PubMed Commons below
Opt Express. 2010 Oct 11;18(21):21622-7. doi: 10.1364/OE.18.021622.

Solution-processed photodetectors from colloidal silicon nano/micro particle composite.

Author information

  • 1Department of Electrical Engineering, University of Washington, Seattle, WA 98195, USA.


We demonstrate solution-processed photodetectors composed of heavy-metal-free Si nano/micro particle composite. The colloidal Si particles are synthesized by electrochemical etching of Si wafers, followed by ultra-sonication to pulverize the porous surface. With alkyl ligand surface passivation through hydrosilylation reaction, the particles can form a stable colloidal suspension which exhibits bright photoluminescence under ultraviolet excitation and a broadband extinction spectrum due to enhanced scattering from the micro-size particles. The efficiency of the thin film photodetectors has been substantially improved by preventing oxidation of the particles during the etching process.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk