Optical and electrical characteristics of LEDs based on a single organic layer

Since the discovery of conductivity in polymers and certain organic molecules, remarkable progress has been made in synthesizing organic materials, in understanding their properties and in developing them for use in electronic and optical devices as stated in A. J. Heeger (2001). Currently, polymer and organic light-emitting diodes (LEDs) based in R. H. Friend et al. (1999), photovoltaic cells based in C. J. Brabec et a. (2003) and field effect transistor based in N. Stutzmann et al. (2003) are being pushed towards commercialization. Among all the conjugated polymers, poly(l,4phenylenevinyiene) or PPV as well as its derivative 2-methoxy-5-(2-ethylhexyloxy)-p- phenylenevinylene or MEH-PPV have been extensively studied for LED applications. We present here a study of a single layer structure LED with MEH-PPV as the active organic layer. Optical and electrical characterization completes the study of the electroluminescence obtained from such device.