Aluminium doped ZnO films were deposited by the sol gel dip coating method. The crystalline quality decreased with increase of Al doping. The band gap varies from 3.32 eV to 3.56 eV with increase of Al doping. This blue shift behavior or broadening in the band gap is mainly due to the Moss-Burstein band filling effect. The films exhibited 60 - 70 % transmission in the visible region. The grain size and surface roughness varied from 45 run to 15 nm and 3.5 nm to 1.3 nm respectively. The intensity of the Raman peaks at 331, 385, 438 and 582 cm~(-1) modes decreased with increasing the Al concentration.
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