Electrostatic Mechanism of Emission Enhancement in Hybrid Metal-semiconductor Light-emitting Heterostructures Page: 74
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integrated PL intensity as well as the peak PL intensity to highlight a disparity which
arises between the two. The integrated intensities show little variation with angle prior to
60 with the Au showing an overall enhancement and the Ag sample a reduction in
intensity. The peak intensities, however, tell a different story. In this case the angle at
which the peak intensity is reached varies significantly between the three samples.
While reference sample peaks at 35 the Ag NP samp le peaks earlier at 30 and the
Au NP sample 10later.
If this change in angle were due to scattering by the NPs, one would expect to
see both the integrated and peak intensities showing a peak at the same angle.
Furthermore, the same would be expected if the change in peak intensity were entirely
due to a change in the distribution of carrier orientations within the QW due to the
aforementioned minimization of energy near the NPs. Instead the disparity between the
0 30 60 90
0 30 60 90
Figure 5.9 a, The peak PL intensity as a function of the measurement angle 0 for
the reference (black), Au NP (red) and Ag NP (blue) samples. b, The integrated PL
intensity as a function of the measurement angle. In both a and b the intensities are
normalized to that of the reference sample at 0 and to the transmission as a
function of angle. The dashed segment of the line represents linear interpolation of
missing data points.
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Llopis, Antonio. Electrostatic Mechanism of Emission Enhancement in Hybrid Metal-semiconductor Light-emitting Heterostructures, dissertation, May 2012; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc115113/m1/84/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .