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Evidence for oxide formation from the single and multiphoton excitation of a porous silicon surface or silicon “nanoparticles”

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.367464· OSTI ID:1562671
 [1];  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
+ Show Author Affiliations
Potential oxidation as monitored by single and multiphoton excitation and associated with the laser induced photoluminescence (PL) from silicon nanoparticles and a porous silicon (PS) surface is considered in the light of recent in situ observations of the photoluminescence process coupled with detailed quantum chemical modeling of the silanone based oxyhydrides. Here, the enhanced oxidation of PS surface bound SiHx moieties as they undergo multiphoton excitation through the SiHx stretch vibrational ladder to the quasicontinuum is suggested as a source of the visible PL produced in the 600–800 nm region. Vibrational-to-electronic energy transfer within the SiHx manifold, as previously suggested, is thought to be unlikely. However, the formation of OSiHx constituencies on the PS surface as these are associated with the silanone-based silicon oxyhydrides would appear to be significant. Evidence for these oxyhydrides may also be apparent in the laser induced PL from silicon nanoparticles. All experimental observations are explained without envoking quantum confinement.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1562671
Alternate ID(s):
OSTI ID: 627959
Report Number(s):
PNNL-SA--28778
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 83; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Radiative thermal emission from silicon nanoparticles: a reversed story from quantum to classical theory journal February 2002

Figures / Tables (9)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
TABLE I(p. 4)table TABLE I
TABLE II(p. 4)table TABLE II
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 5)figure FIG. 5
TABLE III(p. 6)table TABLE III
TABLE IV(p. 7)table TABLE IV

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