A Novel Bat‐Shaped Dicyanomethylene‐4H‐pyran‐Functionalized Naphthalimide for Highly Efficient Solution‐Processed Multilevel Memory Devices. Issue 12 (18th May 2017) - Zhang, Qi‐jian
Abstract: Small‐molecule‐based multilevel memory devices have attracted increasing attention because of their advantages, such as super‐high storage density, fast reading speed, light weight, low energy consumption, and shock resistance. However, the fabrication of small‐molecule‐based devices always requires expensive vacuum‐deposition techniques or high temperatures for spin‐coating. Herein, through rational tailoring of a previous molecule, DPCNCANA (4, 4′‐(6, 6′‐bis(2‐octyl‐1, 3‐dioxo‐2, 3‐dihydro‐1H‐benzo[de]isoquinolin‐6‐yl)‐9H, 9′H‐[3, 3′‐bicarbazole]‐9, 9′‐diyl)dibenzonitrile), a novel bat‐shaped A‐D‐A‐type (A‐D‐A=acceptor–donor–acceptor) symmetric framework has been successfully synthesized and can be dissolved in common solvents at room temperature. Additionally, it has a low‐energy bandgap and dense intramolecular stacking in the film state. The solution‐processed memory devices exhibited high‐performance nonvolatile multilevel data‐storage properties with low switching threshold voltages of about −1.3 and −2.7 V, which is beneficial for low power consumption. Our result should prompt the study of highly efficient solution‐processed multilevel memory devices in the field of organic electronics. Abstract : Follow the bat : A novel bat‐shaped A‐D‐A‐type (A‐D‐A=acceptor–donor–acceptor) symmetric molecule has been successfully designed by rational tailoring of a previous molecule, DPCNCANA (see figure). The resulting solution‐processed memory devices exhibited dense stacking, smooth surfaces, and high‐performance multilevel storage properties with low switching threshold voltages.