The study of both the radiative and nonradiative processes in nearly strain-free AlxGa1-xN alloy was presented. The investigations were conducted via the time-resolved photoluminescence (TRPL) and the positron annihilation techniques. The TRPL study found a biexponential decay at low temperature and, with the increase in the value of x, a simultaneous increase in the size of cation vacancies over that of the near-band-edge one was seen at 300 K. As the dominance of nonradiative and recombination processes in the free states came into play, with the increase in the value of x and the temperature, the TRPL signal became single exponential.
ASJC Scopus subject areas
- Physics and Astronomy(all)