Figure 5. Absorption spectra of AZO thin film for different Al concentrations. (a) 0 at.%. (b) 1 at.%. (c) 2 at.%. (d) 5 at.%

From

Photovoltaic Properties of Aluminum Doped Zinc Oxide Electrodes Based on Variation of Aluminum Impurities in the Semiconductor

M. D. Tyona, R. U. Osuji, C. D. Lokhande, F. I. Ezema

Journal of Materials Physics and Chemistry. 2018, 6(1), 9-16 doi:10.12691/jmpc-6-1-2