Rational Introducing of Functional Spacers to Realize a Novel Organometallic Polymer with Multilevel Memory Behaviors

Abstract

Multilevel resistive random-access memory (ReRAM) is well-researched recently to meet the ever-growing data-storage requirement. However, the proposed mechanisms as charge trap, charge transfer etc. are all highly dependent on molecular stacking regularity. Thus, how to improve the molecular stacking styles is a scientific issue that needs to be solved urgently. In this work, a rational modified organometallic conjugated polymer P(DTPDI-BDT-DPFc) is rational designed with the introduce of 1,1’-diphenyl-substituted ferrocene (DPFc) and a large conjugated spacer of benzo[1,2-b:4,5-b']dithiophene (BDT). UV-vis spectrum confirms the increased main-chain conjugation and the improved coplanar backbone of this new-made organometallic polymer. XRD and GIWAXS measurement shows the regioregularity aggregation and a preferential face-on orientation of P(DTPDI-BDT-DPFc) backbone relative to the substrate. The following P(DTPDI-BDT-DPFc) devices indeed exhibit a specific, stable, and rewritable multilevel memory performance that induced by the successive oxidation of BDT and Fc units. This work provides a reliable strategy as rational introducing of desirable functional spacers to realize excellent optoelectronic performance.

Keywords: ReRAM, functional spacers, organometallic polymer, regioregularity aggregation, multilevel memory performance