We report on the growth of Li-Ni codoped p-type ZnO thin films using pulsed laser deposition. Two mole percent Li monodoped ZnO film shows highly insulating behavior. However, a spectacular decrease in electrical resistivity, from 3.6 × 10 3 to 0.15 Ω cm, is observed by incorporating 2 mol % of Ni in the Lidoped ZnOfilm.Moreover, the activation energy drops to 6meV from78 meV with Ni incorporation in Li:ZnO lattice. The codoped [ZnO:(Li, Ni)] thin film shows p-type conduction with room temperature hole concentration of 3.2 × 10 17 cm -3. Photo-Hall measurements show that the Li-Ni codoped p-ZnOfilm is highly stable even with UV illumination. XPS measurements reveal that most favorable chemical state of Ni is Ni 3+ in (Li, Ni): ZnO. We argue that these Ni 3+ ions act as reactive donors and increase the Li solubility limit. Codoping of Li, with other transitional metal ions (Mn, Co, etc.) in place of Ni could be the key to realize hole-dominated conductivity in ZnO to envisage ZnO-based homoepitaxial devices. © 2011 American Chemical Society.