The UV emission is also called as near band edge emission (NBE) originates due to the free-exciton recombinati on while the green emission are also known as deep level emission (DLE) which appears due to the impurities and structural defects in the grown structure s [22]. The peaks positions of the UV emission are slightly shift to long wavelength for doped sample when compared to undoped sample, showing the red-shift of band gap [30,31].