Electronic structure and light-induced conductivity in a transparent refractory oxide

Abstract

Combined first-principles and experimental investigations reveal the underlying mechanism responsible for a drastic change of the conductivity (by 10 orders of magnitude) following hydrogen annealing and UV-irradiation in a transparent oxide, 12CaO.7Al2O3, found by Hayashi et al. The charge transport associated with photo-excitation of an electron from H, occurs by electron hopping. We identify the atoms participating in the hops, determine the exact paths for the carrier migration, estimate the temperature behavior of the hopping transport and predict a way to enhance the conductivity by specific doping.

4 pages including 4 figures

Cited by in corpus (6)

• Hopping versus bulk conductivity in transparent oxides: 12CaO.7Al2O3
• Averaging of the electron effective mass in multicomponent transparent conducting oxides
• Combining high conductivity with complete optical transparency: A band-structure approach
• Electronic band structure and carrier effective mass in calcium aluminates
• Tunable Conductivity and Conduction Mechanism in a UV light activated electronic conductor
• Unconventional approaches to combine optical transparency with electrical conductivity