Thank u for d answer sir. Well the sample is ternary. Zno doped with Cu and Cd... Used co-precipitation method. And washed with ethanol and water before drying and calcination. The PL for d sample is gud. I did not find any previous literature on d compound synthesized n is sumthng new I m trying. It WI b really helpful sir if I can figure out the solution.
I don't know if you have access to this, but they found very little variation of ZnO lattice parameters with increase Cu concentration: http://www.sciencedirect.com/science/article/pii/S0921452612001196
I see features that could be du to other oxides such as CuO. As a previous answer indicated, you could find software that does a match between peaks and known samples to help you identify. Without software, you would be limited to looking up other known compounds and comparing their peaks which could be a tedious process.