Squarylium compounds for use in display devices
AssigneeNitto Denko Corporation
InventorsMichael Welch, Shijun Zheng, Peng Wang
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Abstract
Described herein are embodiments of squarylium compounds for use as filters in light-emitting and/or display devices. One problem of known quarylium dyes is that strong nucleophiles can attack the electron-deficient cyclobutene ring which can lead to a loss of the dye's colour. Another potential drawback with squaraine dyes can be their tendency to form aggregates, which can lead to a substantial broadening of their absorption bands. Use of the present compounds in filters address these problems. The squarylium compounds of the present invention have the following formulas:
Claims15
A squarylium compound having the chemical formula:
- wherein R1, R2, R3, R5, R6, and R7 are independently H, optionally substituted C1-24 hydrocarbyl, halogen, optionally substituted C1-24—S-hydrocarbyl, or optionally substituted C1-24—O-hydrocarbyl;
- and
- wherein R4 and R8 are independently H or optionally substituted C1-24 hydrocarbyl;
- and
- wherein the dashed line represents the presence of a covalent bond.
Dependencies are inferred from the claim text.