Structural, optical and electronic structure of Al doped ZnO thinfilms grown using pulsed laser deposition on glass substrate areinvestigated. X-ray diffraction measurements reveal that all thefilms are textured along the c-axis and have wurtzite structure.Al doping in ZnO films leads to increase in grain size due to relax-ation in compressive stress. Enhancement in band gap of ZnO filmswith the Al doping is also noticed which can be ascribed to theBrustein–Moss shift. The changes in the electronic structure causedby Al in the doped thin film samples are understood through X-rayabsorption measurements.