Kirchhoff's generalised law applied to amorphous silicon / crystalline silicon heterostructures

Rudolf Brüggemann (1)

1 Institut für Physik

The electro- and photoluminescence spectra of amorphous silicon / crystalline silicon heterostructures and solar cells are determined by emission from the crystalline-silicon layer and are computed with Kirchhoff's generalised law. The interface defect density strongly influences the luminescence yield which may be used to monitor the interface quality. Based on a comparison between numerical and analytically determined spectra, the temperature dependence of experimental electroluminescence and photoluminescence spectra of these silicon heterostructures is analysed. We find a clear indication of the validity of Kirchhoff's generalised law for the luminescence emission from these silicon structures and conclude that it can be applied between 112 K and 363 K without further modification in order to account for the indirect nature of the optical transitions in crystalline silicon.

Mots clés: Physical Sciences

Rudolf Brüggemann. Kirchhoff's generalised law applied to amorphous silicon / crystalline silicon heterostructures. Philosophical Magazine, 2009, 89 (28-30), pp.2519-2529. ⟨10.1080/14786430903074805⟩. ⟨hal-00519092⟩