Photoelectric Cooperative High-Density Data Storage in an Organic Bilayer Thin Film

A bilayer materials system composed of titanylphthalocyanine-N,N,N',N'-tetra(4-methylphenyl)-(1,1'-biphenyl)-4,4'-diamine (TiOPc-TTB) is designed for data storage medium. The photoelectric cooperative effect on data storage is demonstrated for the first time. When the thin film is irradiated with suitable light intensity, the ON/OFF current ratio was effectively enhanced and the threshold voltage can be remarkably reduced. Accordingly, stable and reversible nanoscale data storage with lowered pulsed voltage is achieved by STM. The photoelectric cooperative performance could effectively lower the misreading rate and reduce the power consumption of storage device, and will be of great significance for designing highly efficient information storage materials and novel multifunctional photoelectric devices.