Title: Durable electrooptic devices comprising ionic liquids

Abstract

Electrolyte solutions for electrochromic devices such as rear view mirrors and displays with low leakage currents are prepared using inexpensive, low conductivity conductors. Preferred electrolytes include bifunctional redox dyes and molten salt solvents with enhanced stability toward ultraviolet radiation. The solvents include lithium or quaternary ammonium cations, and perfluorinated sulfonylimide anions selected from trifluoromethylsulfonate (CF.sub.3SO.sub.3.sup.-), bis(trifluoromethylsulfonyl)imide ((CF.sub.3SO.sub.2).sub.2N.sup.-), bis(perfluoroethylsulfonyl)imide ((CF.sub.3CF.sub.2SO.sub.2).sub.2N.sup.-) and tris(trifluoromethylsulfonyl)methide ((CF.sub.3SO.sub.2).sub.3C.sup.-). Electroluminescent, electrochromic and photoelectrochromic devices with nanostructured electrodes include ionic liquids with bifunctional redox dyes. Some of the electrolyte solutions color to red when devices employing the solutions are powered, leading to red or neutral electrooptic devices.

Inventors:

Burrell, Anthony K ^[1]; Agrawal, Anoop ^[2]; Cronin, John P ^[2]; Tonazzi, Juan C. L. ^[2]; Warner, Benjamin P ^[1]; McCleskey, T Mark ^[1]

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+ Show Inventor Affiliations

1. Los Alamos, NM
2. Tucson, AZ

Issue Date:

2009-12-15

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1014026

Patent Number(s):

7633669

Application Number:

US Patent Application

Assignee:

Los Alamos National Security, LLC (Los Alamos, NM)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60R - VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

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B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60R - VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

B60R1/088 - {using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors}

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y20/00 - Nanooptics, e.g. quantum optics or photonic crystals

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K2211/1029 - containing one nitrogen atom as the heteroatom
C09K9/02 - Organic tenebrescent materials

G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING

G02F1/1503 - caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
G02F1/155 - Electrodes
G02F1/157 - Structural association of cells with optical devices, e.g. reflectors or illuminating devices
G02F2202/022 - polymeric
G02F2202/36 - Micro- or nanomaterials

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DOE Contract Number:  

AC52-06NA25396

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

47 OTHER INSTRUMENTATION