In recent times, functional -organic materials: molecular and polymers-, being lightweight, low cost and their ease of production, have made inroads into many areas of devices formerly occupied by -inorganic materials-. Molecular monolayers deposited on Si exhibiting electronic functionalities are expected to push the scaling limits of Si microelectronics down to a few nanometers. Thin films of molecular semiconductors and conducting polymers are widely being used in various devices, such as, light emitting diodes, optically pumped photodetectors, lasers, printed transistors, photorefractive...