ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Photoluminescence spectra of the pentanary alloy semiconductor (AlxGa1−x)1−zInzPyAs1−y (x〈0.33, y〈0.18, z〈0.09) are observed at various temperatures between 300 and 13 K. The spectrum at higher temperatures is of a single peak, in which the line shape is well reproduced by an expression of C(E−Eg)1/2 exp[−(E−Eg)/kBT], where E is the photon energy, Eg the band gap, kB Boltzmann constant, and T temperature. At lower temperatures, a band on the lower energy side grows up rapidly. The plot of integrated luminescence intensity of a high-energy peak as a function of reciprocal temperature shows a single exponential slope. The temperature dependence of the peak energy of the high-energy band is of a hyperbolic cotangent form. These experimental results suggest that the peak on the higher-energy side is attributed to a band-to-band transition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.341501
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