  We study the conditions to realize an excitonic condensed phase in an
electron-hole bilayer system with local Hubbard-like interactions at
half-filling, where we can address the interplay with Mott localization. Using
Dynamical Mean-Field Theory, we find that an excitonic state is stable in a
sizeable region of a phase diagram spanned by the intra-layer (U) and
inter-layer (V) interactions. The latter term is expected to favour the
excitonic phase which is indeed found in a slice of the phase diagram with V >
U . Remarkably, we find that when U is large enough, the excitonic region
extends also for U > V in contrast with naive expectations. The extended
stability of the excitonic phase can be linked to in-layer Mott localization
and inter-layer spin correlations. Using a mapping to a model with attractive
inter-layer coupling, we fully characterize the condensate phase in terms of
its superconducting counterpart, thereby addressing its coherence and
correlation length.

Strongly Correlated Electrons;Superconductivity