Two-dimensional colloidal crystals are difficult to assemble rapidly and without defects. Convective assembly is an easily implemented and controlled technique for depositing colloidal crystals by evaporation of a microparticle suspension from a withdrawing meniscus, but this method is slow and does not produce large crystal domains. Alternatively, dielectrophoresis has been used to produce large single-orientation crystals rapidly but offers no simple way to immobilize the crystals. We report a new method of convective assembly combined with an AC electric field to increase the long-range order and deposition rate of latex microsphere crystals. One effect of the electric field was electrowetting on dielectric, which allowed control of the shape of the meniscus and flow on the microscale. Film spreading at the meniscus caused by electrowetting increased the evaporation rate and allowed for more rapid crystal deposition. By controlling this effect, crystals could be patterned on surfaces in areas of high electric field intensity. Another effect of the electric field was dipolar chaining and organization of particles into large single-orientation crystal domains. We have achieved up to a three-fold increase in the rate of crystal deposition and formation of single crystal domains with millimeter dimensions.