Synthesis and characteristics of nanostructured silicon-rich nitride thin films using modified long-wavelength CO2 laser annealing

Chen-Kuei Chung, C. H. Li, T. S. Chen

研究成果: Review article同行評審

3 引文 斯高帕斯(Scopus)

摘要

The silicon nanocrystals (nc-Si) or nanoparticles (np-Si) surrounded by a dielectric matrix of SiNx or SiOx were traditionally synthesized by chemical vapor deposition and subsequent furnace annealing at a high temperature of 1000 °C on the whole wafer. The short-wavelength (248 nm) KrF excimer laser could also be used for assisting annealing. In this article, the unique method of glass assisted long-wavelength (10.6 μm) CO2 laser annealing through local heating was applied to produce crystallized np-Si on sputtered silicon-rich nitride (SRN) thin films. Various CO2 laser fluences were irradiated on SRN films for studying the evolution of the microstructure and optoelectronic characteristics of films. The size of np-Si on SRN films increases with the laser fluence. According to the photoluminescence (PL) and bonding configuration results, two broad-visible PL spectra of the films were deconvoluted into three bands within wavelengths of 350∼650 nm linked to the unsatisfied interface states, the located states related to the mixed Si-O or Si-N bonds in the SRN layer, and the nc-Si embedded in an a-SiOxNy matrix, respectively. The relationship between the laser fluence, microstructure, and PL behavior of SRN films was discussed and established.

原文English
文章編號096003
期刊Laser Physics Letters
12
發行號9
DOIs
出版狀態Published - 2015 九月 1

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

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