High quality single crystal GaN films with extremely uniform thicknesses have been grown in low pressure metalorganic chemical vapor deposition system using the reaction of (C2H5)3Ga with NH3. Electrical and optical properties of the layers were measured. Schottky barriers were fabricated after compensating the background donor concentration (typicallyND∼1×1019cm−3) with Be+or N+implants. These Schottky barriers were electrically and optically characterized.