In this work it is introduced some results of the studies of kineticevolution to the equilibrium state of a photo-excited semiconductors. Theequations of transistors that describes the evolution to the equilibrium wasobtained through the Statistics Operator Method of not-equilibrium in Zubarevversion. The semiconductor is described in terms of having a charge (Electronsand hole photo-injecteds through an external source of energy) interacting withone another and with a Crystal clear net (phonons). On the model areconsidered the effects of direct recombination to the pair Electron hole,dissemination ambipolar and blindagem interaction electron-phonon. Thephonons group longitudinals optic (LO) and transversals optic (TO) are treatedlike groups out of equilibrium thermal while the groups of phononslongitudinals acoustic (LA) are taken in permanent equilibrium with thermalreservour. Statistic results are showed to the Arseneto de Gálio (GaAs)evidencing not only the transient state but also the stationary state of theplasma. Besides it is introduced a first result about the use of a statistic notconventional (Renyi's statistic) to description of the group phonons LO group.