Inkjet-printed organic field-effect transistor by using composite semiconductor material of carbon nanoparticles and poly(3-hexylthiophene)

Poly(3-hexylthiophene),p3ht,has been widely used in organic electronics as a semiconductor material. it suffers from the low carrier mobility characteristics. this limits p3ht to be employed in applications. therefore,the blending semiconductor material,carbon nanoparticle (cnp),and p3ht,are developed and examined by inkjet-printing organic field-effect transistor technology in this work. the effective carrier mobility of fabricated ofets can be enhanced by 8 folds with adding cnp and using o 2 plasma treatment. at the same time,the transconductance of fabricated ofets is also raised by 5 folds. based on the observations of sem,xrd,and ftir,these improvements are contributed to the local field induced by the formation of cnp/p3ht complexes. this observation presents an insight of the development in organic semiconductor materials. moreover,this work also offers a low-cost and effective semiconductor material for inkjet-printing technology in the development of organic electronics. © 2011 chih-ting lin et al.