Abstract
Carbon nanotube arrays are candidate for ideal electron emitters for high efficient field emission devices such as field emission display, field emission lamps and so on. Three types of carbon nanotube emitter arrays are discussed for (1) the screen printed in-plane triode CNT emitter array, (2) the pillar shaped CNT diode emitter, and (3) a novel short-length, and high-density CNT patterned emitter arrays.