US Patent No. 9,935,270

ELECTROCHEMICAL LIGHT EMITTING CELL, COMPOSITION FOR FORMING LIGHT EMITTING LAYER OF ELECTROCHEMICAL LIGHT EMITTING CELL, AND IONIC COMPOUND FOR LIGHT EMITTING LAYER OF ELECTROCHEMICAL LIGHT EMITTING CELL


Patent No. 9,935,270
Issue Date April 03, 2018
Title Electrochemical Light Emitting Cell, Composition For Forming Light Emitting Layer Of Electrochemical Light Emitting Cell, And Ionic Compound For Light Emitting Layer Of Electrochemical Light Emitting Cell
Inventorship Fumihiro Yonekawa, Tokyo (JP)
Tomo Sakanoue, Tokyo (JP)
Taishi Takenobu, Tokyo (JP)
Assignee NIPPON CHEMICAL INDUSTRIAL CO., LTD., Tokyo (JP) WASEDA UNIVERSITY, Tokyo...

Claim of US Patent No. 9,935,270

1. A light-emitting electrochemical cell comprising an emitting layer and an electrode on each side of the emission layer,the emitting layer containing a light-emitting material and an ionic compound, and
the ionic compound being represented by general formula (1):
wherein M represents N or P; R1, R2, R3, and R4 each independently represent a saturated aliphatic group having 1 to 20 carbon atoms; and X represents a phosphoric ester anion represented by general formula (2) or a sulfuric ester anion represented by general formula (3):PO2(OR)2  (2)wherein R in each occurrence independently represents a saturated aliphatic group having 1 to 20 carbon atomsSO3(OR)  (3)wherein R represents a saturated aliphatic group having 1 to 20 carbon atoms.