Figure 5. A plot of against photon energy for annealed TiO2 films.

From

Correlation of Bond Energy and Optical Band Energy of Annealed TiO2 Thin Films

Gitonga M. John, Simon W. Mugo, James M. Ngaruiya, Nelson Mugambi, Geoffrey G. Riungu

American Journal of Energy Research. 2021, 9(1), 1-5 doi:10.12691/ajer-9-1-1