Temperature‐dependent optical absorption of SrTiO3

摘要: The optical absorption edge and near infrared of SrTiO were measured at temperatures from 4 to 1703 K. decreases 3.25 eV 4 K 1.8 eV 1703 K is extrapolated approximately 1.2 eV the melting point (2350 K). transmission in IR rapidly above 1400 K because free carrier about 50% room temperature value 1673 K. carriers are generated by thermal excitation electrons over band gap formation charged vacancies. observed temperature-dependent can be well reproduced a calculation based on simple models for intrinsic concentration coefficient. red shift rising strongly narrow spectral range impede radiative heat transport through crystal. These effects have considered high applications SrTiO-based devices, as number rises considerably, bulk crystal growth avoid instabilities. Temperature dependent SrTiO3, measured, fitted, point.