Experimental data on the study of short-lived colour centres and luminescence centres are presented which form in LiNbO3 crystals due to the bombardment by short electron pulses (0.25 eV, 20 ns, 15-160 mJ/cm2) in the temperature range 80-350 K. It is shown that the transitional absorption bands at 2.45 and 3.25 eV are attributable (i) to polarons formed by constitutional Li vacancies and holes, (ii) to Nb4+ Li complexes which form either polarons at NbNb-NLi bonds or bipolarons at NbLi-NbLi bonds. With these centres anisotropic absorption bands at 1.6 eV and weakly polarised bands at 4.0 eV are connected.
|Number of pages||6|
|Journal||Physica Status Solidi (A) Applied Research|
|Publication status||Published - Jun 2001|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics