1. Small-signal characteristics of fully-printed high-current flexible all-polymer three-layer-dielectric transistors.
- Author
-
Kheradmand-Boroujeni, Bahman, Schmidt, Georg C., Höft, Daniel, Haase, Katherina, Bellmann, Maxi, Ishida, Koichi, Shabanpour, Reza, Meister, Tilo, Carta, Corrado, Hübler, Arved C., and Ellinger, Frank
- Subjects
- *
ORGANIC field-effect transistors , *DIELECTRIC devices , *POLYETHYLENE terephthalate , *PRINTED circuits , *FERROELECTRIC capacitors , *RELAXOR ferroelectrics - Abstract
All-polymer, semi-transparent, three-layer-dielectric (3L) organic field effect transistors (OFETs) are fabricated on polyethylene terephthalate plastic substrate, using high-throughput printing techniques. Analog small-signal characteristics of the 3L OFET are presented and are compared against the previous version of this technology, which was based on a single-layer dielectric and a metal gate electrode. The 3L transistor withstands 50 V, can continuously drive 50 μA/mm, reaches an excellent intrinsic-gain ( A v0 ) of 43 dB, an equivalent mobility of 0.85 cm 2 /V, and a transit frequency ( f T ) of 68 kHz, well suited for applications such as driving printed piezoelectric loudspeakers and flexible audio systems. The effects of the relaxor-ferroelectric high-k layer in the 3L stack on the gate capacitance, g m , and A v0 are measured in the frequency domain. In addition, it is observed that PEDOT:PSS makes a better interface with polymer dielectric comparing to copper particle ink. Five-hour small- and large-signal bias stress tests are performed. A novel direct A v0 measurement technique, and an improved transconductance extraction method are also presented. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF