Photoluminescence of Te-doped gallium antimonide crystals

The evolution of photoluminescence spectra and variation of the degree of polarization of emission of GaSb(Te) crystals under uniaxial pressure are studied in the Hall concentration range 2 x 1017 to 2 x 1018 cm-3. It is shown, that the PL spectra are adequately described by a theory which takes into account electron transition from the c-band to the second ionized state of the acceptor. The pressure coefficient of the shift of the L-minimum is found equal to 10 x 10-3 meV/kg cm-2. An estimate of the deformational potential constant is also made. (author)