Influence of Substrate Temperature and Post-Deposition Annealing on Material Properties of Ga-Doped ZnO Prepared by Pulsed Laser Deposition
Ga-doped ZnO films were prepared at 10 mTorr of oxygen over a broad temperature range using pulsed laser deposition. The carrier concentration of as-deposited films decreased monotonically with deposition temperature over a temperature range of 25A degrees C to 450A degrees C. Post-deposition annealing of as-deposited films in forming gas (5% H(2) in argon) or vacuum resulted in a substantial increase in both carrier concentration and electron mobility. The figure of merit was highest for films deposited at 250A degrees C then annealed in forming gas at 400A degrees C. The optical transmittance was near 90% throughout the visible and near-infrared spectral regions. These results indicate that Ga-doped ZnO is a viable alternative to transparent indium-based conductive oxides.
Scott, R. C.,
Leedy, K. D.,
Look, D. C.,
Smith, D. J.,
& Zhang, Y.
(2011). Influence of Substrate Temperature and Post-Deposition Annealing on Material Properties of Ga-Doped ZnO Prepared by Pulsed Laser Deposition. Journal of Electronic Materials, 40 (4), 419-428.