DC Green Electroluminescence of Al-CuGaS₂ Diode

Abstract

The dc green electroluminescence (EL) spectra observed at the Al-CuGaS 2 diode are described over the temperature range of 100-220 K. The EL is just correspondent with the main EL of the Al-ZnS-CuGaS 2 heterojunction diode. This confirms our previous proposal for the green EL from the Al-ZnS-CuGaS 2 heterojunction diode that it originates from the CuGaS 2 crystal, not from the ZnS film. Some possibilities for the electron injection from the Al electrode are also discussed in association with the current-voltage characteristics.