Band gap tailoring, structural and morphological behavior of Zn0.96-x Co0.04Cu (x) O (0 a parts per thousand currency sign x a parts per thousand currency sign 0.10) alloys by sol-gel method
D Anbuselvan, S Muthukumaran, M Ashokkumar
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | SPRINGER | Published : 2014
Zn0.96-x Co0.04Cu x O (0 & x ; 0.1) nanopowders were successfully synthesized by sol-gel method. Hexagonal structure was confirmed by X-ray diffraction spectra. A new phase around 38.4° corresponding to CuO was noticed after Cu = 4 %. The reduced crystal size up to Cu = 4 % is due to the substitution of Cu2+ and the increasing crystal size after Cu = 4 % is due to the interference between Co and Cu metal ions. The higher absorption of Cu doped Zn0.96Co0.04O than undoped was due to the created charge carries. The tuning of energy gap from 3.18 to 3.69 eV by Cu-doping was discussed in terms of crystal size, the created charge carriers and the interstitial zinc atoms and oxygen deficiencies. Pr..View full abstract
Awarded by University Grant Commission, Hyderabad
The authors are thankful to the University Grant Commission, Hyderabad, for financial support under the project (File No.: MRP-3610/11(MRP/UGC-SERO)).