Printable Organic Nanoelectronics for Memory, Sensors and Display

摘要

Two terminal memory devices have been successfully fabricated and evaluated using hybrid lead sulfide/metal free phthalocyanine nanocomposites and solution processed zinc oxide as active materials. For both cases, the size of the hysteresis and on-off ratios depend upon the bias scan rate, giving the best performance for the low scan rate. These memory devices have several advantages in terms of greater flexibility, low cost, easy fabrication procedure, 3-D stacking of memory layer and large area fabrication. Solution processable custom designed bisphthalocyanines have been employed in this project for the fabrication and integration of thin film organic devices on flexible substrates for displays. Ambipolar charge transport characteristics and On/Off ratio, low threshold voltage and contact resistances have been evaluated with a view to integrating into practical complimentary circuits. Voltammograms of specially designed lanthanide bisphthalocyanines exhibit one- electron quasi-reversible redox processes and these results are significant for the development of cost-effective, practical biosensors.