Rabbit Anti-Human DNTT Monoclonal Antibody, clone CQ7190

Multivalued logic (MVL) computing could provide bit density beyond that of Boolean logic. Unlike conventional transistors, heterojunction transistors (H-TRs) exhibit negative transconductance (NTC) regions. Using the NTC characteristics of H-TRs, ternary inverters have recently been demonstrated. However, they have shown incomplete inverter characteristics; the output voltage (V-OUT) does not fully swing from V-DD to G(ND). A new H-TR device structure that consists of a dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene (DNTT) layer stacked on a PTCDI-C13 layer is presented. Due to the continuous DNTT layer from source to drain, the proposed device exhibits novel switching behavior: p-type off/p-type subthreshold region /NTC/ p-type on. As a result, it has a very high on/off current ratio (approximate to 10(5)) and exhibits NTC behavior. It is also demonstrated that an array of 36 of these H-TRs have 100% yield, a uniform on/off current ratio, and uniform NTC characteristics. Furthermore, the proposed ternary inverter exhibits full V-DD-to-G(ND) swing of V-OUT with three distinct logic states. The proposed transistors and inverters exhibit hysteresis-free operation due to the use of a hydrophobic gate dielectric and encapsulating layers. Based on this, the transient operation of a ternary inverter circuit is demonstrated for the first time.

Field-effect transistors (FETs) consisting of vapor-deposited thin-film of dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) as an active layer on silanized Si/SiO2 substrates were fabricated and evaluated. Depending on the length of alkyl groups in silanization reagents, FET characteristics of the devices were affected: with octadecyltrichlorosilane (C-18-OTS), devices showing superior FET characteristics up to FET mobility of 3.1 cm(2) V-1 s(-1) were obtained.