Abstract
In this work, a room-temperature, printed, low-voltage, flexible organic field-effect transistor (OFET) has been successfully developed by utilizing 4,4′-(hexafluoroisopropylidene)diphthalic anhydride-3,5-diaminobenzyl cinnamate (6FDA-DABC) and diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (DPP-DTT) as polymer insulator and semiconductor layers, respectively. Dielectric properties are systematically evaluated to investigate the room-temperature processability of 6FDA-DABC. In addition, the introduction of insulating polymer, polystyrene (PS), blends considerably improves the electrical characteristics of DPP-DTT-based OFETs. The operation voltage is successfully lowered to −5 V by reducing the gate dielectric thickness. OFETs based on DPP-DTT:PS annealed under various temperature conditions demonstrate the fully room-temperature processability. Finally, OFETs integrated with ultrathin flexible substrates exhibit excellent mechanical flexibility while maintaining device performance. This work provides a great freedom in the choice of plastic substrates for the development of flexible electronic applications.In this work, a room-temperature, printed, low-voltage, flexible organic field-effect transistor (OFET) has been successfully developed by utilizing 4,4′-(hexafluoroisopropylidene)diphthalic anhydride-3,5-diaminobenzyl cinnamate (6FDA-DABC) and diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (DPP-DTT) as polymer insulator and semiconductor layers, respectively. Dielectric properties are systematically evaluated to investigate the room-temperature processability of 6FDA-DABC. In addition, the introduction of insulating polymer, polystyrene (PS), blends considerably improves the electrical characteristics of DPP-DTT-based OFETs. The operation voltage is successfully lowered to −5 V by reducing the gate dielectric thickness. OFETs based on DPP-DTT:PS annealed under various temperature conditions demonstrate the fully room-temperature processability. Finally, OFETs integrated with ultrathin flexible substrates exhibit excellent mechanical flexibility while maintaining device performance. This work provid...
Highlights
Organic field-effect transistors (OFETs) have attracted considerable interest for electronic applications in flexible materials.1,2 In particular, solution-processed flexible OFETs have many advantages, some of which include lower manufacturing cost, simpler and easier fabrication, and larger-area processability compared with vacuum-processed OFETs and inorganic-based FETs.3–5 Polymer insulators and semiconductors have been further studied because they show excellent features of mechanical flexibility, low-temperature processability, and lightweight
The reduction of processing temperature for polymer insulators is one of the main challenges facing the integration of plastic substrates into the fabrication of flexible OFETs
We successfully developed room-temperature, printed, low-voltage, flexible OFETs using 6FDA-diamino benzyl cinnamate (DABC), DPPDTT, and poly-para-xylylene (Parylene) C as the polymer gate dielectric, polymer semiconductor, and flexible substrate layers, respectively
Summary
Organic field-effect transistors (OFETs) have attracted considerable interest for electronic applications in flexible materials.1,2 In particular, solution-processed flexible OFETs have many advantages, some of which include lower manufacturing cost, simpler and easier fabrication, and larger-area processability compared with vacuum-processed OFETs and inorganic-based FETs.3–5 Polymer insulators and semiconductors have been further studied because they show excellent features of mechanical flexibility, low-temperature processability, and lightweight.6. We successfully developed room-temperature, printed, low-voltage, flexible OFETs using 6FDA-DABC, DPPDTT, and poly-para-xylylene (Parylene) C as the polymer gate dielectric, polymer semiconductor, and flexible substrate layers, respectively.
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