  We study the temperature-dependent modifications of trion and exciton
photoluminescence (PL) spectra in modulation-doped CdTe/CdMgTe quantum wells in
high magnetic field. We find that, in magnetic field, the temperature-dependent
redistribution of exciton and trion PL intensities is opposite to that expected
from a simple Boltzmann distribution model. Solving a system of rate equations
that describe the exciton-trion energy levels, we calculate the temperature
dependence of the exciton and trion PL intensities. The calculations show good
agreement with the experimental data.
