Experimental method | Eg (eV) |
X-ray photoemission spectra | 3.6 [a], 3.85 [b] |
Optical and UV absorption | 3.9 [c], 4.3 [d] |
Laser-induced fluorescence (LIF) | 4.02 [e] |
Optical reflectivity spectra | 4.5 [f], 5.2 [g] |
Luminescence optical spectra | >5.5 [h], 5.89 [i], 5.95 [j] |
Photoconductivity, and absorption spectra | 5.8 [k], 5.83 [l] |
Temperature dependence of electrical resistivity | 7.1 [m] |