A low-cost and efficient process producing improved organic electronic devices such as transistors that may be used in a variety of applications is described. The applications may include radio frequency identification (RFID) devices, displays and the like. In one embodiment, the improved process is implemented by flash annealing a substrate with an energy having wavelengths ranging from about 250 nm to about 1100 nm or higher. In this flash annealing process energy having wavelengths from about 250 nm to about 350 nm or higher is substantially prevented from irradiating the substrate.