Performance Comparison of Different Organic Molecular Floating-Gate Memories

Publication Type:

Journal Article

Source:

IEEE Trans. Nanotechnol., ieeexplore.ieee.org, Volume 10, Issue 3, p.594-599 (2011)

ISBN:

1536-125X

Keywords:

2011, 2013 and earlier, 3,4,9,10- perylenetetracarboxylic bis-benzimidazole, carrier mobility, Charge carrier processes, charge retention elements, charge storage, charge transport, charge-storage density, CMOS memory circuits, coherent material set, device durability, Electron mobility, evaporation, Flash memory, flash-memory technology, hysteresis window, Material storage, Materials testing, memory retention, molecular films, molecular materials, molecular thin films, Molecules, nanosegmented floating-gate memories, nanosegmented floating-gate structures, nonvolatile, Nonvolatile memory, organic, organic dye molecules, organic molecular floating-gate memories, organic semiconductors, Permission, semiconductor storage, SONOS devices, thermally evaporated thin films, thin film devices, Transistors

Abstract:

In this paper, nanosegmented floating-gate memories consisting of a uniform set of identical organic dye molecules were fabricated and
evaluated for potential use as programmable charge storage and charge
retention elements in a future flash-memory technology. Viability of
molecular thin films to serve as an energetically uniform set of 1 nm in
size charge-retaining sites is tested on a series of molecular materials,
the best performing of which are thermally evaporated thin films of
3,4,9,10- perylenetetracarboxylic bis-benzimidazole. The initial results
show device durability over 105 program/erase cycles, with hysteresis
window of up to 3.3 V, corresponding to charge-storage density as high as
5 × 1012 cm-2. Data shows that charge retention is improved for molecular
films with lower carrier mobility, which for the first time experimentally
confirms in a coherent material set that inhibiting charge transport by
nanosegmented floating-gate structures benefits the memory retention.