Transparent and Flexible Graphene Charge-Trap Memory

A transparent and flexible graphene charge-trap memory (GCTM) composed of a single-layer graphene channel and a 3-dimensional gate stack was fabricated on a polyethylene naphtalate substrate below eutectic temperatures (similar to 110 degrees C). The GCTM exhibits memory functionality of similar to 8.6 V memory window and 30% data retention per 10 years, while maintaining similar to 80% of transparency in the visible wavelength. Under both tensile and compressive stress, the GCTM shows minimal effect on the program/erase states and the on-state current. This can be utilized for transparent and flexible electronics that require integration of logic, memory, and display on a single substrate with high transparency and endurance under flex.