Thermophotovoltaic conversion (TPV) is very coveted nowadays because of its output and its high density of power. Its literature is relatively young and only since 1961 in the context from the cold war between the two super power dates. Carried out work enabled us to see the limiting outputs until one can wait in this energy transformation as well into near field into far field. The best performance obtained in far field turns around 43% exceeding the thermodynamic output predicted by Schockley-Queisser (33%) and which is in net agreement with the output of Carnot. It during the outputs obtained for an ideal system is higher than those of Carnot thus utopian. The limiting outputs for a system TPV in near field give results largely higher than those of the far field. What is satisfying it is that they are not exult by the output of Carnot thus realizable.