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Title: Micro-crystallographic and spectral response studies of CdSe1-x Tex alloyed thin films
Authors: More, P D
Shahane, G S
Deshmukh, L P
Bhosale, P N
Belhekar, A A
Dongare, M K
Issue Date: Jan-2002
Publisher: NISCAIR-CSIR, India
Abstract: Chemical deposition of CdSe1-xTex solid solution thin films from salt solutions of cadmium, selenium and tellurium derivatives of sodium sulphite at 70°C temperature has been presented. The quantitative analyses (EDS and spectrophotometric) showed that the film deposits are Cd rich and compared to the Te Se content is larger. The variation of xfilm with xbath is non-linear. The  XRD studies show composites to be crystalline in nature and both CdSe and CdTe existed in both hexagonal wurtzite and cubic zinc blende structures whereas CdSe1-xTex  alloys were hexgonal dominating. Both wurtzite (0x0.08) and zinc blende (0 x 0.15) phases undergo solid solution and variation in lattice parameters followed Vegard’s law. The surface topography showed diffused grain polycrystalline texture with an overgrowth developed in some cases. The spectral studies of these films gave a continuous change in the optical gap (Eg = 1.76 to 1.45 eV ) with a band to band direct type of transitions.
Page(s): 62-68
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(01) [January 2002]

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