A decoration element including a color developing layer including a light reflective layer, a light absorbing layer provided on the light reflective layer, and a convex portion or concave portion having an asymmetric-structured cross-section; an electrochromic device provided on any one surface of the color developing layer; and an in-mold label layer provided on the other surface of the color developing layer.

Herein are described two-dimensional metal organic frameworks (2D MOFs). The 2D MOFs includes a plurality of multivalent metals or metal ions and a plurality of multidentate ligands arranged to form a crystalline structure having a lateral size of at least about 2.5 μm and a thickness of less than about 5 nm. Herein are also described methods for preparing the 2D MOFs. The 2D MOFs can be used, for example, in electrochromic devices such as smart windows and flexible displays.

An object of the present invention is to provide a novel electrochromic device (ECD). Disclosed is an electrochromic device (ECD) comprising two metal-complex-based electrochromic thin films individually acting as a working electrode and a counter electrode; (i) one of the two metal-complex-based electrochromic thin films being a film of a cathodically coloring metallo-supramolecular polymer comprising at least one organic ligand having a plurality of metal coordination positions and a metal ion of at least one transition metal and/or lanthanoid metal with the at least one organic ligand and the metal ion being arranged alternately, and the other of the two metal-complex-based electrochromic thin films being a film of an anodically coloring metal hexacyanoferrate (MHCF) represented by the formula: M(II).sub.3[Fe(III)CN.sub.6].sub.2 (where M=Fe, Ni or Zn), and (ii) the electrochromic device having a first conducting substrate; the film of the cathodically coloring metallo-supramolecular polymer; an electrolyte; the film of the anodically coloring metal hexacyanoferrate (MHCF); and a second conducting substrate being arranged in this order.

The present invention discloses a flat panel and a flat panel display. The flat panel comprises a plurality of pixels, and in each pixel: the first ion transport layer and the first transparent electrode layer respectively generate a first hole and a first electron, and the organic light emitting layer generates white light; the second ion transport layer and the second transparent electrode layer respectively generate a second hole and a second electron, and the electrochromic layer changes color; a value of the second voltage is adjusted to make the electrochromic layer change to be three colors of red, green, blue, and to correspondingly generate red light, green light and blue light with the white light generated by the organic light emitting layer, and the generated red light, green light and blue light are color mixed to be kinds of colors.

Broadband electrochromic devices (ECDs) with independent band-selectivity over visible and near-infrared (NIR) radiation have attracted immense interest because of their functional benefits over the conventional ECDs. The independent dual band activity in ECDs usually needs special architecting by blending/layering different materials having activity in two different regions. The present invention provides a broadband electrochromic device that comprises a layer of polycrystalline nanosheets and an amorphous porous layer. Here we demonstrated achieving a remarkably high visible modulation with unprecedented NIR blocking performance by employing a bi-layered electrode of the same material, i.e. porous a-WO.sub.3 layer on top of polycrystalline WO.sub.3.Math.H.sub.2O nanosheets. This facile and inexpensive electrode preparation could provide a new platform for realizing high-performing dynamic smart glass with extraordinary spectrally-selective energy saving.

A multifunctional solid-state photovoltachromic device (1) comprising at least one n-type layer (8) and at least one p-type layer (11) arranged to create a PN or PIN junction, said n-type layer (8) and p-type layer (11) comprising materials arranged to act as mixed conductors, thus allowing both charge transport and ion conduction.

A decoration element including a color developing layer including a light reflective layer, a light absorbing layer provided on the light reflective layer, and a convex portion or concave portion having an asymmetric-structured cross-section; an electrochromic device provided on any one surface of the color developing layer; and an in-mold label layer provided on the other surface of the color developing layer.

An object of the present invention is to provide a novel electrochromic device (ECD). Disclosed is an electrochromic device (ECD) comprising two metal-complex-based electrochromic thin films individually acting as a working electrode and a counter electrode; (i) one of the two metal-complex-based electrochromic thin films being a film of a cathodically coloring metallo-supramolecular polymer comprising at least one organic ligand having a plurality of metal coordination positions and a metal ion of at least one transition metal and/or lanthanoid metal with the at least one organic ligand and the metal ion being arranged alternately, and the other of the two metal-complex-based electrochromic thin films being a film of an anodically coloring metal hexacyanoferrate (MHCF) represented by the formula: M(II).sub.3[Fe(III)CN.sub.6].sub.2 (where M=Fe, Ni or Zn), and (ii) the electrochromic device having a first conducting substrate; the film of the cathodically coloring metallo-supramolecular polymer; an electrolyte; the film of the anodically coloring metal hexacyanoferrate (MHCF); and a second conducting substrate being arranged in this order.

Herein are described two-dimensional metal organic frameworks (2D MOFs). The 2D MOFs includes a plurality of multivalent metals or metal ions and a plurality of multidentate ligands arranged to form a crystalline structure having a lateral size of at least about 2.5 μm and a thickness of less than about 5 nm. Herein are also described methods for preparing the 2D MOFs. The 2D MOFs can be used, for example, in electrochromic devices such as smart windows and flexible displays.

A multifunctional solid-state photovoltachromic device (1) comprising at least one n-type layer (8) and at least one p-type layer (11) arranged to create a PN or PIN junction, said n-type layer (8) and p-type layer (11) comprising materials arranged to act as mixed conductors, thus allowing both charge transport and ion conduction.