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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 21622–21627

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

Chang-Ching Tu, Liang Tang, Jiangdong Huang, Apostolos Voutsas, and Lih Y. Lin  »View Author Affiliations

Optics Express, Vol. 18, Issue 21, pp. 21622-21627 (2010)

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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.

© 2010 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(310.6845) Thin films : Thin film devices and applications
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:

Original Manuscript: June 22, 2010
Revised Manuscript: September 16, 2010
Manuscript Accepted: September 21, 2010
Published: September 28, 2010

Chang-Ching Tu, Liang Tang, Jiangdong Huang, Apostolos Voutsas, and Lih Y. Lin, "Solution-processed photodetectors from colloidal silicon nano/micro particle composite," Opt. Express 18, 21622-21627 (2010)

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