Abstract
Graphitic carbon nitride nanosheet (g-C 3 N 4-NS) has layered structure similar with graphene nanosheet and presents unusual physicochemical properties due to the s-triazine fragments. But their electronic and electrochemical applications are limited by the relatively poor conductivity. The current work provides the first example that atomically thick g-C 3 N 4-NSs are the ideal candidate as the active insulator layer with tunable conductivity for achieving the high performance memory devices with electrical bistability. Unlike in conventional memory diodes, the g-C 3 N 4-NSs based devices combined with graphene layer electrodes are flexible, metal-free and low cost. The functionalized g-C 3 N 4-NSs exhibit desirable dispersibility and dielectricity which support the all-solution fabrication and high performance of the memory diodes. Moreover, the flexible memory diodes are conveniently fabricated through the fast laser writing process on graphene oxide/g-C 3 N 4-NSs/graphene oxide thin film. The obtained devices not only have the nonvolatile electrical bistability with great retention and endurance, but also show the rewritable memory effect with a reliable ON/OFF ratio of up to 10 5, which is the highest among all the metal-free flexible memory diodes reported so far, and even higher than those of metal-containing devices.
Original language | English |
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Article number | 5882 |
Journal | Scientific Reports |
Volume | 4 |
DOIs | |
Publication status | Published - 30 Jul 2014 |