Comparison of Luminescence in LiGaO2, Al2O3-Ga and Al2O3-Li Crystals

L. Trinkler 1 , A. Trukhin 1 , and Mitch M.C. Chou 2
  • 1 Institute of Solid State Physics, University of Latvia, LV-1063, Riga, Latvia
  • 2 Center of Crystal Research, National Sun Yat-sen University, Kaohsiung


We have studied luminescence of LiGaO2, Al2O3-Ga and Al2O3-Li crystals in order to reveal the nature of luminescence centres and mechanisms in these crystals. In Al2O3-Ga presence of Ga impurities determines occurrence of the 280 nm emission band, which demonstrates intra-centre character in photoluminescence and recombination character under X-ray irradiation. In Al2O3-Li crystal lithium induced luminescence is presented with the 326 nm band, which has a recombination character. Basing on spectral similarity of the main luminescence bands in pure LiGaO2 crystal with the dopant-induced emission bands in Al2O3, and on peculiarities of the X-ray induced thermoluminescence, the adjustment of the previous luminescence interpretation is done. It is proposed that the donor-acceptor pairs with random separation distribution responsible for the 280 nm emission are represented with gallium Ga (plus an electron) and O (plus a hole) pairs, while the donor-acceptor pairs, producing the 330 nm emission band contain a lithium ion, presumably in the interstitial position Lii0, and a neighbouring oxygen ion with a caught hole.

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  • 1. Tumėnas, S., Mackonis, P., Nedzinskas, R., Trinkler, L., Berzina, B., Korsaks, V., … Chou, M. M. C. (2017). Optical properties of lithium gallium oxide. Applied Surface Science, 421, 837–842.

  • 2. Chen, C., Li, C.-A., Yu, S.-H., & Chou, M.M.C. (2014). Growth and characterization of β-LiGaO2 single crystal. J. Cryst. Growth, 402, 325–329.

  • 3. Trinkler, L., Trukhin, A., Berzina, B., Korsaks, V., Ščajev, P., Nedzinskas, R., … Li, C.-A. (2017). Luminescence properties of LiGaO2 crystal. Optical Materials, 69, 449–459.

  • 4. Jansons, J., Kulis, A., Rachko, Z., Springis, M., Tale, I., & Valbis, J. (1983). Luminescence of Ga-Doped α-Al2O3 Crystals. Phys. Stat. Sol., (b) 120. 511–518.

  • 5. Namozov, B., Fominich, M., Myurk, V., & Zakharchenya, R. (1998). Phys. Solid State 40, 837–838.

  • 6. Springis, M., Kulis, P., & Tale, I. (1995). Point defects related to 260 K thermostimulated luminescence in α- Al2O3. Radiation Effects and Defects in Solids, 134, 481–483.

  • 7. Trukhin, A.N., Jansons, J.L., & Truhins K. (2004). Luminescence of silica glass containing aluminum oxide. Journal of Non-Crystalline Solids, 347(1–3), 80–86.

  • 8. Trukhin, A., & Rudenko, V. (1987). Spectral-kinetic investigations of luminescence centers – Non-bridging oxygen-one valence ion. Soviet Glass Physics and Chemistry 13, 236–241. (in Russian)

  • 9. Binet, L., & Gourier, D. (1998). Origin of the blue luminescence of β-Ga2O3. J. Phys. Chem Solids, 59, 1241–1249.


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