US 11,835,833 B2
Electrochromic device
Yong Chan Kim, Daejeon (KR); Ki Hwan Kim, Daejeon (KR); and Pil Sung Jo, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/604,496
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Apr. 23, 2018, PCT No. PCT/KR2018/004667
§ 371(c)(1), (2) Date Oct. 10, 2019,
PCT Pub. No. WO2018/199567, PCT Pub. Date Nov. 1, 2018.
Claims priority of application No. 10-2017-0054316 (KR), filed on Apr. 27, 2017; and application No. 10-2018-0045414 (KR), filed on Apr. 19, 2018.
Prior Publication US 2020/0159080 A1, May 21, 2020
Int. Cl. G02F 1/155 (2006.01); H01B 1/02 (2006.01); G02F 1/1523 (2019.01)
CPC G02F 1/155 (2013.01) [H01B 1/02 (2013.01); G02F 1/1525 (2013.01); G02F 2001/1555 (2013.01); G02F 2203/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A reflective electrochromic device, comprising:
a conductive layer;
an electrochromic layer;
an electrolyte layer; and
a light-transmitting counter electrode layer sequentially,
wherein the conductive layer comprises AlOxNy (0<x≤1.5, 0<y≤1, x+y>0) satisfying the Relation Equation below:

OG Complex Work Unit Math
wherein, in AlOxNy, x and y mean ratios of atomic numbers of O and N to one atom of Al, respectively and in the Relation Equation above, based on 100% of all elemental contents contained in AlOxNy, the (aluminum elemental content) represents the elemental content (atomic %) of Al, the (oxygen elemental content) represents the elemental content (atomic %) of O, and the (nitrogen elemental content) represents the elemental content (atomic %) of N,
wherein the elemental content (atomic %) of oxygen in the AlOxNy is from 2.0±0.7 to 5.9±1.3 or wherein the elemental content (atomic %) of nitrogen in the AlOxNy is from 36.5±0.8 to 39.2±0.7;
wherein a thickness of the conductive layer is from 54.6 nm to 108.5 nm,
wherein applying a voltage change to the conductive layer and the light-transmitting counter electrode layer changes a color of the electrochromic layer in a colored or bleached state,
wherein the conductive layer has both light absorption and reflective characteristics,
wherein the conductive layer has lower reflectiveness than a metal,
wherein the conductive layer reflects light both on a surface of the conductive layer and at the interfaces with the adjacent layers,
wherein the conductive layer alters the color of the electrochromic device, and
the reflective electrochromic device provides a color that is different from the color expressed in the electrochromic layer.