Valence-band offsets at the AlxGa0.5−xIn0.5P-ZnSe(001) lattice-matched interface
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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1718-1723
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Physical Review B, Volume 55, issue 3
Abstract
The difficulty in making good Ohmic contact at the interfaces with p-doped ZnSe is an important problem hindering the realization of blue-light-emitting diode lasers based on the II-VI semiconductor technology. So far no metal or semiconductor material has been found to have a low enough barrier at the (001) interface with ZnSe. A possible solution to this problem is the insertion of a so-called barrier-reduction layer at the interface with ZnSe. We have investigated the interface formation energies and valence-band offsets at the (001) interface between AlxGa0.5−xIn0.5P and ZnSe. The results of our calculations show the existence of a strong interdependence between the valence-band offset and the interface geometric structure. The interface is found to have structural and electronic similarities to the GaAs-ZnSe(001) system. The very low values obtained for the valence-band offset confirm the possibility of using this material as a major constituent of the barrier-reduction layer.Description
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Benardini , F & Nieminen , R M 1997 , ' Valence-band offsets at the AlxGa0.5−xIn0.5P-ZnSe(001) lattice-matched interface ' , Physical Review B , vol. 55 , no. 3 , pp. 1718-1723 . https://doi.org/10.1103/PhysRevB.55.1718