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Chemical reversability of the electrical dedoping of conducting polymers: An organic chemically erasable programmable read-only memory
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FIG. 1.

Log transmittance spectra of PEDT:PSSH undergoing an electrical dedoping and chemical redoping cycle in a planar electrode array. (a) Pristine device, (b) after biasing at for , (c) after further biasing at for , and (d) after redoping with vapor (, room temperature) and thermal annealing at . The spectra have been filtered by a smoothing spline parametrized using the measured noise in the spectra.

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FIG. 2.

Normalized change in resistance during “read–write” cycles of a planar device after electrical stress (write) and vapor exposure (erase) Inset: Log-log of a planar device after electrical stress (blue) and after vapor exposure (red).

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FIG. 3.

Switching time measurements. (a) Voltage and current transients across a PEDT:PSSH in a vertical sandwich configuration at high field: -thick , during application of a bias step of . The bias step shows a transient dip after due to the transient spike in the conductance of the device, resulting in significant voltage burden at the pulse generator. (b) Voltage and current transients measured across PEDT:PSSH in a lateral electrode array configuration at medium field: , during application of a bias step of .

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/content/aip/journal/apl/93/3/10.1063/1.2962988
2008-07-23
2014-04-20

Abstract

The loss of electronic conductivity of -doped poly(3,4-ethylenedioxythiophene) at high electrical bias is shown to be chemically reversible upon redoping with iodine vapor. This provides further confirmation that the initial loss of conductivity arises from the injection-induced dedoping mechanism. Repeat “write-erase” cycles are possible, which gives a rudimentary organic chemically erasable programmable read-only memory. Transient measurements show that the write time (i.e., time for loss of conductivity) decreases from thousands of seconds just above the critical electric field of to millisecond well above this value but below the onset of electrochemical destruction.

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Scitation: Chemical reversability of the electrical dedoping of conducting polymers: An organic chemically erasable programmable read-only memory
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/3/10.1063/1.2962988
10.1063/1.2962988
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