Record number :
Title of article :
Emission of lights of various colors from p-CdS:Cu/n-CdS thin-film diodes
Author/Authors :
Yasube Kashiwaba، نويسنده , , Jun Sato، نويسنده , , Takashi Abe، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
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Abstract :
p-CdS:Cu/n-CdS thin-film diodes were fabricated by an all-vacuum deposition process. Light emissions were observed in a forward current at 77 K. The colors of emitted light changed within the range of blue–green to red depending on the Cu concentration and the forward current densities. The spectra of the lights were broad, and the peaks shifted to shorter wavelengths with increases in current densities. Also, spectra of the lights had small peaks near the absorption edge of CdS. It is thought that the change in the color of emitted lights is caused by mixing of two transition processes in CdS films: the interband and/or near-interband transitions and the transition through deep and broad Cu levels.
Keywords :
p-type , CdS homojunction , Variable color LED , Light-emitting diode , CdS thin film , Cu-doping
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
Link To Document :