Electron paramagnetic resonance(EPR) has been used to investigate singly ionized selenium vacancy V Se + centers in ZnSe epilayers grown by molecular beam epitaxy(MBE). The study included undoped and nitrogen-doped films. Spectra taken at 8 K and 9.45 GHz, as the magnetic field was rotated in the plane from  to , showed an isotropic signal at g =2.0027±0.0004 with a linewidth of 5.8 G. In the two samples where this signal was observed, estimates of concentration were approximately 1.1×10 17 and 6.3×10 17 cm −3 . The appearance of the EPR signal correlated with an increase in the Zn/Se beam equivalent pressure ratio (during growth) in undoped films and with an increase in the nitrogen concentration in doped films. We conclude that the singly ionized selenium vacancy may be a dominant point defect in many MBE-grown ZnSe layers and that these defects may play a role in the compensation mechanisms in heavily nitrogen-doped ZnSe thin films.
Digital Commons Citation
Setzler, S. D.; Moldovan, M.; Yu, Zhonghai; Myers, T. H.; Giles, N. C.; and Halliburton, L. E., "Observation Of Singly Ionized Selenium Vacancies In Znse Grown By Molecular Beam Epitaxy" (1997). Faculty & Staff Scholarship. 620.
Setzler, S. D., Moldovan, M., Yu, Zhonghai., Myers, T. H., Giles, N. C., & Halliburton, L. E. (1997). Observation Of Singly Ionized Selenium Vacancies In Znse Grown By Molecular Beam Epitaxy. Applied Physics Letters, 70(17), 2274-2276. http://doi.org/10.1063/1.118836