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Table 1

Bandgap Eg , affinity X, permittivity ϵ, and densities of states in the conduction band NC and in the valence band NV of GaN and InN [2931]. The absorption is given by equation (2), the C and D values being fitting from experimental data [32], with Eph the incident photons energy and Eg the InGaN bandgap for a given indium composition x.

  E g (eV) X(eV) N C (cm−3) N V (cm−3) ϵ
GaN 3.42 4.1 2.3 × 1018 4.6 × 1019 8.9
InN 0.7 5.6 9.1 × 1017 5.3 × 1019 15.3

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