ELECTROCHROMIC DISPLAY ELEMENT

• Main Authors: URA NAOKI, TAKAHASHI HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 06.10.2022
• Subjects: ADVERTISING; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; DISPLAYING; EDUCATION; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

To provide an electrochromic display element that is excellent in transparency, inhibits cracks in a coloring layer, and has good appearance and performance characteristics.SOLUTION: An electrochromic display element comprises a first substrate 11, a first electrode 13, a first electrochromic layer 15, an electrolyte layer 17, a second electrode 14, and a second substrate 12 in this order. The first electrochromic layer contains tin oxide with a primary average particle diameter of less than 30 nm, and an electrochromic compound including a bond functional group to the tin oxide. The substance quantity of the electrochromic compound per area in the first electrochromic layer is 2.0×10-8 mol/cm2 to 2.0×10-7 mol/cm2.SELECTED DRAWING: Figure 1 【課題】透明性に優れ、発色層のクラックを抑制し、外観及び動作特性の良好なエレクトロクロミック表示素子を提供する。【解決手段】第一の基板１１と、第一の電極１３と、第一のエレクトロクロミック層１５と、電解質層１７と、第二の電極１４と、第二の基板１２と、をこの順で有し、第一のエレクトロクロミック層が、一次平均粒子径が３０ｎｍ未満の酸化スズと、酸化スズに対する結合性官能基を有するエレクトロクロミック化合物と、を含み、第一のエレクトロクロミック層の面積あたりのエレクトロクロミック化合物の物質量が、２．０×１０－８ｍｏｌ／ｃｍ２～２．０×１０－７ｍｏｌ／ｃｍ２であるエレクトロクロミック表示素子。【選択図】図１