Electric Field Effect in Organic Semiconductors DMR 0405208 PI: Michael Gershenson Development of the single-crystal organic field-effect transistors (OFETs) at Rutgers enabled the exploration of transport phenomena in organic semiconductors and the fundamentals of organic electronics. The main results of the 2 nd year of the project: the first real space molecular resolution images of the surface of a single crystal organic semiconductor E. Menard et al., Adv. Mater. 18, 1552-1556 (2006) observation of the Hall effect in OFETs; first direct measurements of the density of mobile field- induced carriers in the OFET channel V. Podzorov et al., Phys. Rev. Lett. 95, 226601 (2005). the first review on the fundamentals of charge transport in single-crystal organic transistors M. E. Gershenson et al., Rev. Mod. Phys., Sept. 2006 fast carrier dynamics of light-induced excitations in organic crystals H. Najafov et al., Phys. Rev. Lett. 96, 056604 (2006) O. Ostroverkhova et al., Appl. Phys. Lett. 88, 162101 (2006). ultrasensitive sensing with organic field-effect transistors V. Podzorov et al., Appl. Phys. Lett. 87, 093505 (2005). observation of the photo-induced charge transfer “air-gap” organic single-crystal field- effect transistor