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Schematic diagram of the OBDs fabricated in this work.
(a) Plane-view bright-field TEM image of the ZnO QDs dispersed in the DMF solution, (b) plane-view bright-field TEM image of ZnO QDs embedded in a PMMA polymer with a concentration of %. The inset of (a) indicates a high-resolution enlarged TEM view of the ZnO QDs.
Current-voltage curves for the Al/hybrid ZnO QDs-PMMA/ITO devices with PMMA concentrations of 0.5, 1.5, and . Empty triangles, empty circles, and empty rectangles represent the devices with PMMA concentrations of 0.5, 1.5, and , respectively.
(a) Write-read-erase-read sequence operation of the Al/hybrid ZnO QDs-PMMA/ITO devices; the sequence of the voltage pulse is 2, 1, −2, and 1 V. (b) Currents as functions of the number of cycles for the ON and the OFF states of the OBDs.
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