Optical and structure properties of heavily al-doped CDS films

الملخص EN

Pure and heavy doped Cadmium sulfide thin films have been prepared using thermally evaporation on glass substrate at room temperature (R.T).

CdS was doped by Al metal according to the weight ratio (CdS : Al = 10 : 1, 10 : 2) .Crystalline structure of thin films that annealed at different temperature for 1h was zinc blende (ZB) structure with lattice parameter about 5.84Å.

The preferred orientation of pure and doped CdS (CdS: Al = 10 : 1) is (111) plane.

Most of these films have transparency over 80 % in the visible spectrum.

Ammonium doping into CdS films improved the optical transmittance in the visible region of light and increased the optical band gap from 2.38eV to 2.55eV.