We have studied the h.minescerce kinetties of bourd exciters in nitrgen doped Ⅲ-Ⅴ binary or trinary compounds

considering various radiative and nonradiative processes.Ⅲ-Ⅴ compounds are excited by the light of above-gap energy. The free exciton is first created

then trapped by N impurities

ard after that the bound exciton can be either annihilated radiatively ard nonradiatively cr dissociated

as a result of thermalization

from the impurity to become a free exciton. A part of these free excitons will be trapped again by other centers ard the excitation energy is transferee to the other eeriers. The clrei rart cf them will be directly annihilated through radiative cr ncriadiative transitions.