After converging the ecut, you need to converge the k-grid values, and then find the optimised lattice parameters of the structure. Using the converged parameters run a relax calculation to get the ground state atomic positions corresponding to your cell parameters. Now, Use the optimised atomic positions to run scf, nscf, and bands calculation (using pw.x). You shoud use atomatic K_points during the scf and nscf calculation, and use highsymmetric tpiba or crystal_b K_POINTS for the bands calculation. As for the final step to get the band structure, run a postprocessing bands input file using bands.x. You will see a gnu file with the band structure data.

You can see the tutorials avalaible in the QUANTUM ESPRESSO website (http://www.fisica.uniud.it/~giannozz/QE-Tutorial/).

Dear Divyasree Sasikumar ,

You should probably first tell us where you failed or stopped. Did you get an error from QE? In that case, you should share it with us if you want a more tailored solution.

The procedure highlighted by Dhanjit Talukdar is correct and should lead you to obtain the electronic band structure.

Regards,

Roberto