Nosov Yu. G.1, Shapenkov S. V.1,2, Vyvenko O. F.2, Varygin G. V.1,2, Scheglov M. P.1, Kitsay A. A.1, Chikiryaka A. V.1, Nikolaev V. I.1
1Ioffe Institute, St. Petersburg, Russia
2St. Petersburg State University, St. Petersburg, Russia
Email: Yu.Nosov@mail.ioffe.ru
The results of studying the crystallographic, electrical and optical properties of K2O x 8Ga2O3 crystals obtained by interaction of a Ga2O3 solution with a KF melt are presented. The crystal structure of the samples corresponded to hexagonal P6_3/mmc β-gallate with the lattice parameters a=5.80 Angstrem and c=23.5 Angstrem. The crystals were insulators with a resistance of about 2-3 GΩ per 450 μm of length. For the first time, the optical band gap of 3.77 eV and the intrinsic luminescence band in the range of 2.0-2.5 eV were determined for K2O x 8Ga2O3. Keywords: Crystal growth, crystal structure, gallate, cathodoluminescence.
- S. Bairagi, C.-L. Hsiao, R. Magnusson, J. Birch, J.P. Chu, F.-G. Tarntair, R.-H. Horng, K. Jarrendahl. Opt. Mater. Express, 12, 3284 (2022). DOI: 10.1364/OME.462668
- K. Zhang, V.G.T. Vangipuram, H. Huang, J. Hwang, H. Zha. Adv. Electron. Mater., 2300550 (2023). DOI: 10.1002/aelm.202300550
- Y. Bao, Ch. Kuo, P.S. Nicholson. Solid State Ion, 130, 293 (2000). DOI: 10.1016/S0167-2738(00)00635-4
- N. Doebelin, R. Kleeberg. J. Appl. Crystallogr., 48, 1573 (2015). DOI: 10.1107/S1600576715014685
- D. Samaras, G. Kotrotsios, A. Collomb, J.C. Guitel, A.C. Stergiou. Solid State Ion, 21, 143 (1986). DOI: 10.1016/0167-2738(86)90205-5
- H. Zhong, F. Pan, S. Yue, C. Qin, V. Hadjiev, F. Tian, X. Liu, F. Lin, Z. Wang, J. Bao. J. Phys. Chem. Lett., 14, 6702 (2023). DOI: 10.1021/acs.jpclett.3c01416
- S. Shapenkov, O. Vyvenko, E. Ubyivovk, O. Medvedev, G. Varygin, A. Chikiryaka, A. Pechnikov, M. Scheglov, S. Stepanov, V. Nikolaev. Phys. Status Solidi A, 217, 1900892 (2020). DOI: 10.1002/pssa.201900892
- Q. Chen, C. Ji, C.-K. Duan. Phys. Rev. B, 109, 165124 (2024). DOI: 10.1103/PhysRevB.109.165124
- Y. Du, C. Zhang, S. Cui, G. Li, N. Tang, B. Shen, J. Xu, H. Tang, L. Zhao. CrystEngComm., 27, 2392 (2025). DOI: 10.1039/D5CE00062A