Fabrication of carbon nanotube emitter on the flexible substrate

Carbon nanotube (CNT) emitter on the flexible substrate was developed by simple printing of CNT composite containing spin on glass (SOG) on indium tin oxide (ITO) coated polyethylene terephthalate (PET) film and heat treatment at 150 °C. Mixture of terpineol and binder polymer such as ethyl cellulose and acryl was used as an organic vehicle in CNT composite. Si and O atoms from SOG were uniformly dispersed and formed silica bonding in CNT composite after heat treatment at 150 °C. Adhesion between CNT composite and the PET substrate was excellent. Turn-on electric field of CNT emitter was 2.9 V/μm. Sheet resistance of CNT composite was about 30 Ohm/sq.