Low-Voltage Multilevel Memory Based on Organic Thin-Film Transistor

A low-voltage multilevel organic thin-film memory device is proposed and demonstrated for nonvolatile data storage. Charge carrier density in the storage field was tuned up to four discrete levels in pentacene organic thin-film transistor with poly(methyl methacrylate)-modified Al
₂
O
₃
film as the dielectric layer through light-assisted program procedures. Charges can be stored over 1 × 10
⁴
s at room temperature. The states can be clearly distinguished after 1 × 10
⁴
write-read cycles.