Roll‐to‐Roll fabrication of large area functional organic materials

Abstract

With the prospect of extremely fast manufacture of very low cost devices, organic electronics prepared by thin film processing techniques that are compatible with roll-toroll (R2R) methods are presently receiving an increasing interest. Several technologies using organic thin films are at the point, where transfer from the laboratory to a more production-oriented environment is within reach. In this review, we aim at giving an overview of some of the R2R-compatible techniques that can be used in such a transfer, as well the current status of R2R application within some of the existing research fields such as organic photovoltaics, organic thin film transistors, light-emitting diodes, polymer electrolyte membrane fuel cells, and electrochromic devices.

Arrays of Pentacene Single Crystals by Stencil Evaporation

“…3,4 TFT performance improves significantly upon a minimization of the number of grain boundaries in organic thin films as these boundaries act as energy barriers for percolating charges. [5][6][7] Additionally, the patterning of the semiconductor film is required to 3 achieve low off currents in electrical devices.…”

Synthesis and characterization of regioregular poly(3‐dodecyltellurophene)

“…The reaction mixture was cooled to about 40 C, and then slowly added to 150 mL of methanol and 15 mL of 1 N aqueous HCl solution. The precipitated polymer was dissolved in small amount of CHCl 3 and added into 150 mL of methanol. The resulting polymer was further purified by Soxhlet extraction using methanol and hexane, then dried in vacuum to give dark solid.…”

“…[1][2][3] Great interest has been focused on thiophene-based p-conjugated organic materials, due to their promise as organic semiconductors. [4][5][6] In recent years, polyselenophenes have been developed that have narrow highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gaps, high ambipolar charge transport characteristics, and solar cells.…”

Harnessing self-assembly strategies for the rational design of conjugated polymer based materials

“…5,6 Solutionphase processing methods such as inkjet or screen printing provide a route to facile, low cost fabrication of these devices. 7 However, the nanostructure of conjugated polymer lms deposited using such methods will be inuenced by the conformation of the polymer species present in solution. Similarly, the semiconductor-like optical and electronic properties of conjugated polymers also depend explicitly on the physical conformation of the polymer chains.…”