Near white light emission of silicon nanocrystals

Soojin Lee; Il-Ki Han; Woon-Jo Cho

doi:10.1117/12.506581

24 November 2003 Near white light emission of silicon nanocrystals

Soojin Lee, Il-Ki Han, Woon-Jo Cho

Proceedings Volume 5224, Nanomaterials and Their Optical Applications; (2003) https://doi.org/10.1117/12.506581
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Silicon nanoparticles in the range from 2 nm to 5 nm was prepared from Zintl salt, soldium silicide (NaSi) by sonochemical method. This synthesis permits the reaction completed as fast as in a few hours and the easy alkyl-modification of nanocrystals surface at room temperature and ambient pressure. The average size of nanoparticles measured by the dynamic light scattering analysis was 2.7 nm. The high-resolution transmission electron micrograph cofirmed the material identity of nanoparticles as crystalline silicon. FT-IR spectra are consistent with the surface states of nanocrystals that is chlorine- or butyl-capped. The emission peak center moved to longer wavelength (up to 430 nm) with the reaction time, under a 325 nm excitation. The luminescence of silicon colloids looks bright bluish-white under excitation using a commercial low-intensity UV lamp.

Citation Download Citation

Soojin Lee, Il-Ki Han, and Woon-Jo Cho "Near white light emission of silicon nanocrystals", Proc. SPIE 5224, Nanomaterials and Their Optical Applications, (24 November 2003); https://doi.org/10.1117/12.506581

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