Good means having DSSC efficiency from 3-5% with ZnO/Graphene nanocomposite Photoanode....
And one more query.Sir...as i have seen from your papers that graphene have xrd sinature at 24.3 degree which i got in my case but why in RAMAN signature of graphene is absent . The composites have 0.25,0.5 and 1 by wt% in ZnO.
When you have found in XRD, you should get the related Raman peaks for graphene also. Which wavelength are you using for Raman? If it is confocal Raman, you may increase the acquisition time or laser power. Keep in mind that sample should not burn.