  In this article, we close a gap in the literature by proving existence of
invariant measures for reflected SPDEs with only one reflecting barrier. This
is done by arguing that the sequence (u(t, .)) is tight in the space of
probability measures on continuous functions and invoking the Krylov-Bogolyubov
theorem. As we no longer have an a priori bound on our solution as in the
two-barrier case, a key aspect of the proof is the derivation of a suitable Lp
bound which is uniform in time.
