4 ORGANIC ELECTRONICS: INTERFACES, HETEROJUNCTIONS AND SEMICONDUCTOR DEVICE ENGINEERING

FETs, LEDs and photovoltaic diodes are routinely fabricated with molecular semiconductors and polymers, and are now developed as viable technologies for large-area flexible electronics. However, they also allow the study of the basic electronic excitations of this broad class of materials. I will illustrate the control of electronic structure that can be obtained at interfaces, including excitons confined to semiconductor heterojunctions for LED and photovoltaic operation, and electrons and holes confined to semiconductor-dielectric interfaces in FETs