High performance organic transistor active-matrix driver developed on paper substrate

Abstract

The fabrication of electronic circuits on unconventional substrates largely broadens their application areas. For example, green electronics achieved through utilization of biodegradable or recyclable substrates, can mitigate the solid waste problems that arise at the end of their lifespan. Here, we combine screen-printing, high precision laser drilling and thermal evaporation, to fabricate organic field effect transistor (OFET) active-matrix (AM) arrays onto standard printer paper. The devices show a mobility and on/off ratio as high as 0.56 cm2V−1s−1 and 109 respectively. Small electrode overlap gives rise to a cut-off frequency of 39 kHz, which supports that our AM array is suitable for novel practical applications. We demonstrate an 8 × 8 AM light emitting diode (LED) driver with programmable scanning and information display functions. The AM array structure has excellent potential for scaling up.

Charge-integrating organic heterojunction phototransistors for wide-dynamic-range image sensors

“…Using the same deposited source-drain and gate electrodes as read and address lines, respectively, and a gate dielectric layer between these lines, simplifies the fabrication process and is commonplace for both lithographically processed 10,15,19,26,29,30 and printed device arrays [31][32][33] . However, highly resistive read lines may result from source-drain electrodes typically not being optimized for conductivity but rather for charge injection and extraction from the semiconductor.…”

Thin-film organic semiconductor devices: from flexibility to ultraflexibility

“…Highly bendable OFET matrix was demonstrated on ultrathin parylene-C substrates using printed silver (Ag) nanoparticle interconnectors [145], on paper substrates assisted by a lithographic method [38,57], on mesh-like substrates [167] and even by substrate-free a) Solution-processable; b) not available; c) with a freestanding gate insulator/dielectric layer; d) with an encapsulation layer freestanding method [70]. Foldable OFET arrays applicable on both plastics and glass can be realized by using engineered substrates with nonuniform thickness, with thin areas for easy folding and thick areas for easy handling [168].…”

Controlled Growth of Ultrathin Film of Organic Semiconductors by Balancing the Competitive Processes in Dip-Coating for Organic Transistors

“…[1][2][3][4][5][6][7][8][9] Generally, the thickness of organic semiconductor layer in organic electronic devices is in the range of several tens of to hundreds of nanometer (nm), which consists of tens of or more molecular layers. [10][11][12][13][14][15][16] On the other hand, ultrathin film (< 15 nm, Figure 1a) of organic semiconductors represents a kind of nano-scale film consisting of monolayer to few molecular layers (Figure 1b).…”