We successfully fabricated 5-inch organic thin film transistors array with 320×240 pixels on
flexible substrate. All the processes were done by photolithography, spin coating and ink-jet printing.
The OTFT-Electrophoretic (EP) pixel structure, based on a top gate OTFT, was fabricated. The
mobility, ON/OFF ratio, subthreshold swing and threshold voltage of OTFT on flexible substrate are:
0.01 cm2/V-s, 1.3 V/dec, 10E5 and -3.5 V. After laminated the EP media on OTFT array, a panel of 5
inch 320×240 OTFT-EPD was fabricated. All of process temperature in 10×10 OTFT-EPD is lower
than 150 . The pixel size in our panel is 300 μm × 300 μm, and the aperture ratio is 50 %. The OTFT
channel length and width is 20 μm and 200μm, respectively. We also used OTFT to drive EP media
successfully. The operation voltages that are used on the gate bias are -30 V during the row data
selection and the gate bias are 0 V during the row data hold time. The data voltages that are used on the
source bias are -20 V, 0 V, and 20 V during display media operation.
Printed electronics have attracted increasing attentions in recent years due to its flexible format, easy process and potentially
low cost features. Achieving good performance organic Schottky diode as the key component of a rectifier for printed RFID
applications became a critical task. The electrical performances of an organic Schottky diode electrical can be improved by
inserting an intermediate layer between the semiconductor and electrode surfaces. This interface plays an important role in
improving rectification ratio and lifetime of a polymer diode. In this work, a 13.56MHz rectifier based on a polymer
Schottky diode will be demonstrated and a wireless energy transmission built on flexible substrates will be proposed.
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