  We explore the prospect of producing primordial black holes around the solar
mass region during an early matter domination epoch. The early matter-dominated
epoch can arise when a moduli field comes to dominate the energy density of the
Universe prior to big bang nucleosynthesis. The absence of radiation pressure
during a matter-dominated epoch enhances primordial black hole formation from
the gravitational collapse of primordial density fluctuations. In particular,
we find that primordial black holes are produced in the $0.1-10~M_{\odot}$ mass
range with a favorable choice of parameters in the theory. However, they cannot
explain all of the merger events detected by the LIGO/Virgo gravitational wave
search. In such a case, primordial black holes form about $4\%$ of the total
dark matter abundance, of which $95\%$ belongs to the LIGO/Virgo consistent
mass range. The rest of the dark matter could be in the form of particles that
are produced from the decay of the moduli field during reheating.
