A Novel Poly-N-Epoxy Propyl Carbazole Based Memory Device

Abstract

Generally, polymer-based memory devices store information in a manner distinct from that of silicon-based memory devices. Conventional silicon memory devices store charges as either zero or one for digital information, whereas most polymers store charges by the switching of electrical resistance. For the first time, this study reports that the novel conducting polymer Poly-N-Epoxy-Propyl Carbazole (PEPC) can offer effective memory storage behavior. In the current research, the electrical characterization of a single layer memory device (metal/polymer/metal) using PEPC, with or without doping of charge transfer complexes 7,7,8,8-tetra-cyanoquino-dimethane (TCNQ), was investigated. From the current–voltage characteristics, it was found that PEPC shows memory switching effects in both cases (with or without the TCNQ complex). However, in the presence of TCNQ, the PEPC performs faster memory switching at relatively lower voltage and, therefore, a higher ON and OFF ratio (ION/IOFF ~ 100) was observed. The outcome of this study may help to further understand the memory switching effects of conducting polymer.

Organic Donor‐Acceptor Complexes As Potential Semiconducting Materials

“…The memory storage capability of poly-N-epoxy-propylcarbazole (PEPC) was studied in a single layer memory device. [131] Specifically, the electrical properties of a single layer memory device utilizing PEPC in pristine form were compared with the TCNQ complexed analogue. Apparently, when TCNQ was introduced, the memory switching behaviour of PEPC was enhanced, enabling faster switching at lower voltages.…”

“…The memory storage capability of poly‐N‐epoxy‐propylcarbazole (PEPC) was studied in a single layer memory device [131] . Specifically, the electrical properties of a single layer memory device utilizing PEPC in pristine form were compared with the TCNQ complexed analogue.…”

Morphology optimization of side-chain copolymers yields a ternary memory device with high stability and reproducibility

“…Herein, carbazole (Cz) units, widely explored in memory research, were also introduced as the functional pendant owing to their large conjugated planarity and hole transporting characteristics. [28][29][30] Meanwhile, nitro substituted carbazoles (NCzs) were designed as electron-acceptors in consideration of the same sp 2 hybrid nitrogen atoms in Cz/NCz units (Fig. 1).…”