Abstract: | The temperature dependence of five edge emission lines of GaSe at high excitation levels has been investigated by using the second harmonic of a neodymium-glass laser. The following lines were indentified at 77.3K:hvB = 2.102 ± 0.002 eV, annihilation of free excitons; hvC = 2.082 ± 0.003 eV, Auger recombination of free excitons; hvD = 2.072 ± 0.003 eV and hvE = 2.055 ± 0.004 eV, annihilation of free excitons with emission of optical phonons (LO1 = 31 meVandLO2 = 45 meV, respectively); hvG = 2.036 ± 0.004 eV, radiative recombination at indirect transition with emission of LO1 phonons. |