Heteroionic junction light emitting electrochemical cell

Details Heteroionic junction light emitting electrochemical cell Heteroionic junction light emitting electrochemical cell

2011-03-08

2011-03-08

Macchiarolo, Peter J (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000, C313S505000, C313S483000

Reexamination Certificate

active

07902744

ABSTRACT:
A structure for high performance light emitting electrochemical cells comprises at least two active layers of mixed ionic/electronic conducting materials, at least one of which is electroluminescent. The active layers are sandwiched between ion blocking electrodes, typically metal and/or transparent conducting oxide, that are electrically but not ionically conductive. Application of bias to the electrodes results in the polarization of ions at the electrodes thereby generating a field to drive the injection of electronic carriers into the active layer. The injected electron and holes recombine within the active layers to emit light. The ability to balance electron and hole injection in the design of such devices provides for optimal light emission efficiency.

REFERENCES:
Cheng et al. “Unidirectional Current in a Polyacetylene Hetero-ionic Junction.” J. Am. Chem. Soc., 126 (28), 8666-8667, 2004.

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