Yu Rongwen, L&#252; Yijun, Zheng Jiansheng. TEMPERATURE DEPENDENCE OF THE DISORDERED Ga<sub>0.52</sub>In<sub>0.48</sub>P PHOTOLUMINESCENCE SPECTRUM[J]. Chinese Journal of Luminescence, 1999,20(1): 22-24
Yu Rongwen, L&#252; Yijun, Zheng Jiansheng. TEMPERATURE DEPENDENCE OF THE DISORDERED Ga<sub>0.52</sub>In<sub>0.48</sub>P PHOTOLUMINESCENCE SPECTRUM[J]. Chinese Journal of Luminescence, 1999,20(1): 22-24DOI:
The integrated photoluminescence(PL) intensity of disordered Ga
0.52
In
0.48
P samples grown by metalorganic vapor phase epitaxy(MOVPE) have been measured as a function of temperature. The fitting to the integrated intensity shows two activation energies in two different temperature regions. Below 100K
the activation energy is about 4meV; above 100K
the activation energy is 35meV. We conclude that the low temperature PL behaviour is likely controlled by carriers thermalization from spatial fluctuations of the band edges followed by non-radiative recombination. The high temperature PL behaviour is suspected to be dominated by a nonradiative path whose characteristic activation energy and transition probability depends upon the degree of sublattice ordering.