Manufacture of organic transistors on large‐area flexible substrate using direct imaging exposure system by wet process suitable for roll‐to‐roll production

Abstract

Organic thin‐film transistors (OTFTs) can be fabricated via a wet process and have exceptionally high flexibility. Therefore, production using the roll‐to‐roll (RtoR) method is expected. We succeeded in developing a new OTFT wet fabrication process adaptable to the RtoR process. Utilizing the electroless plating method for wiring formation, all materials can be formed in a wet process and can be patterned using the photolithography process. In addition, we succeeded in fabricating OTFT on an A4‐type flexible substrate using RtoR direct imaging exposure system.

Solution Processed Organic Transistors on Polymeric Gate Dielectric with Mobility Exceeding 15 cm2 V−1 s−1

“…In comparison to other polymeric gate dielectrics, Parylene C exhibited a superior performance for 5H-21DNTT OTFT devices, and the OTFT devices showed a remarkable average mobility of 10.9 cm 2 V -1 s -1 , as well as a maximum mobility exceeding 15 cm 2 V −1 s −1 , with a 100% reliability factor.In recent years, organic thin-film transistors (OTFTs) have been extensively studied in the pursuit of achieving low-cost, large-area, and flexible electronics. [1][2][3] Owing to the unique properties of organic semiconductors (OSCs), OTFTs are potential candidates for realizing future display applications, [4,5] large-area sensor arrays, [6,7] gas and biochemical sensors, [8][9][10] and radio-frequency identification (RFID) tag applications. [11,12] The solution processability of OSCs is the most promising parameter to facilitate low-cost mass production of novel device applications via printing techniques on flexible and large-area substrates.…”