Abstract
Ambipolar organic electronics offer great potential for simple and low-cost fabrication of complementary logic circuits on large-area and mechanically flexible substrates. Ambipolar transistors are ideal candidates for the simple and low-cost development of complementary logic circuits since they can operate as n-type and p-type transistors. Nevertheless, the experimental demonstration of ambipolar organic complementary circuits is limited to inverters. The control of the transistor polarity is crucial for proper circuit operation. Novel gating techniques enable to control the transistor polarity but result in dramatically reduced performances. Here we show high-performance non-planar ambipolar organic transistors with electrical control of the polarity and orders of magnitude higher performances with respect to state-of-art split-gate ambipolar transistors. Electrically reconfigurable complementary logic gates based on ambipolar organic transistors are experimentally demonstrated, thus opening up new opportunities for ambipolar organic complementary electronics.
Highlights
Organic and polymeric materials deposited at low cost on large-area mechanically flexible substrates are the basis for ubiquitous and imperceptible electronic surfaces integrated in smart objects, opening new application opportunities in several fields, including for example entertainment, wellness, security, communication, mobility, healthcare, etc[1,2,3,4,5]
The maximum drain current obtained in ambipolar organic thin-film transistors (OTFTs) with gaps can be up to one order of magnitude lower than that of full-gate ambipolar OTFTs fabricated in the same technology
The Al2O3 is treated with octadecylphosphonic acid (ODPA) and poly[{2,5-bis(2-hexyldecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl}- alt -{[2,2′:5′,2′′-terthiophene]-5,5′′-diyl}] (PDPP3T) is deposited by spin coating[35,36]
Summary
Organic Transistors received: 22 August 2016 accepted: 03 October 2016 Published: 20 October 2016. Ambipolar organic electronics offer great potential for simple and low-cost fabrication of complementary logic circuits on large-area and mechanically flexible substrates. We show high-performance non-planar ambipolar organic transistors with electrical control of the polarity and orders of magnitude higher performances with respect to state-of-art split-gate ambipolar transistors. Reconfigurable complementary logic gates based on ambipolar organic transistors are experimentally demonstrated, opening up new opportunities for ambipolar organic complementary electronics. Non-planar gate ambipolar transistors show efficient operation and the maximum hole and electron drain currents, normalized by the transistor geometries, are more than one order of magnitude higher than state-of-art split-gate ambipolar transistors, providing inverters with superior performances. The superior performance of non-planar split gate combined with the design optimization ensured by reconfigurable organic logic gates opens up new opportunities for the development of large area flexible circuits and smart sensors
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