Light emitting element

Abstract

A light emitting element is disclosed, including a plurality of pixels, each pixel including a substrate layer, a first metal layer and a second metal layer stacked on the substrate layer, and an organic material layer disposed between the first metal layer and the second metal layer. The organic material layer of each of the pixels emits light having a peak wavelength within a first range. The first metal layer and the second metal layer that are spaced apart from each other by the organic material layer generate a coupling, and the peak wavelength of the light is shifted.

What is claimed is: 
     
         1 . A light emitting element comprising a plurality of pixels, each pixel comprising:
 a substrate layer including a surface;   a first metal layer formed on the surface of the substrate layer;   an organic material layer formed on the first metal layer, such that the first metal layer is disposed between the substrate layer and the organic material layer; and   a second metal layer formed on the organic material layer, such that the organic material layer is disposed between the first metal layer and the second metal layer,   wherein the organic material layer of each of the pixels emits light that has a peak wavelength within a first range, and the first metal layer and the second metal layer that are spaced apart from each other by the organic material layer generate a coupling such that the peak wavelength of the light is shifted,   wherein each of the pixel further has one of the following structures:
 the first metal layer covers the surface completely, the peak wavelength of the light is shifted from the first range to a second range by adjusting a thickness of the first metal layer to be less or a distance between the first metal layer and the second metal layer to be greater, or the peak wavelength of the light is shifted from the first range to a third range by adjusting the thickness of the first metal layer to be greater or the distance between the first metal layer and the second metal layer to be less; 
 the first metal layer has a metal portion that covers a portion of the surface of the substrate layer and an open portion that exposes a remaining portion of the surface, the peak wavelength of the light is shifted from the first range to the second range by adjusting a thickness of the metal portion to be less or a distance between the metal portion and the second metal layer to be greater, or the peak wavelength of the light is shifted from the first range to the third range by adjusting a thickness of the metal portion to be greater or a distance between the metal portion and the second metal layer to be less; 
 the first metal layer has a first metal portion and a second metal portion that cover the surface of the substrate layer, the peak wavelength of the light is shifted from the first range to the second range by adjusting the thickness of the first metal portion to be less or a distance between the first metal portion and the second metal layer to be greater, or the peak wavelength of the light is shifted from the first range to the third range by adjusting a thickness of the second metal portion to be greater or the distance between the second metal portion and the second metal layer to be less; and 
 the first metal layer has a first metal portion, a second metal portion, and an open portion formed between the first metal portion and the second metal portion for exposing a portion of the surface of the substrate layer, the peak wavelength of the light is shifted from the first range to the second range by adjusting a thickness of the first metal portion to be less or a distance between the first metal portion and the second metal layer to be greater, or the peak wavelength of the light is shifted from the first range to the third range by adjusting the thickness of the first metal portion to be greater or the distance between the first metal portion and the second metal layer to be less. 
   
     
     
         2 . The light emitting element of  claim 1 , wherein the light has wavelengths that cover a visible light band, the first range is between 376 nm and 708 nm, the second range is between 570 nm and 750 nm, and the third range is between 380 nm and 495 nm. 
     
     
         3 . The light emitting element of  claim 1 , which is a passive matrix organic light emitting diode or an active matrix organic light emitting diode. 
     
     
         4 . The light emitting element of  claim 1 , wherein the second range or the third range is changed by adjusting the thickness of the first metal layer, a thickness of the second metal layer, or the distance between the first metal layer and the second metal layer. 
     
     
         5 . The light emitting element of  claim 1 , wherein the second range or the third range is changed by adjusting the thickness of the metal portion, a thickness of the second metal layer, or the distance between the metal portion and the second metal layer. 
     
     
         6 . The light emitting element of  claim 1 , wherein the second range is changed by adjusting the thickness of the first metal portion, a thickness of the second metal layer, or the distance between the first metal portion and the second metal layer, and the third range is changed by adjusting the thickness of the second metal portion, the thickness of the second metal layer, or the distance between the second metal portion and the second metal layer. 
     
     
         7 . The light emitting element of  claim 1 , wherein the first metal layer has the thickness between 5 nm and 20 nm, and the first metal layer and the second metal layer are spaced apart at the distance between 75 nm and 150 nm. 
     
     
         8 . The light emitting element of  claim 1 , wherein the metal portion has the thickness between 5 nm and 20 nm, and the metal portion and the second metal layer are spaced apart at the distance between 75 nm and 150 nm. 
     
     
         9 . The light emitting element of  claim 1 , wherein the first metal portion has the thickness between 5 nm and 20 nm, the first metal portion and the second metal layer are spaced apart at the distance between 75 nm and 150 nm, the second metal portion has the thickness between 5 nm and 20 nm, the second metal portion and the second metal layer are spaced apart at the distance between 75 nm and 150 nm, wherein the thickness of the second metal portion is greater than the thickness of the first metal portion, or the distance between the second metal portion and the second layer is less than the distance between the first metal portion and the second metal layer. 
     
     
         10 . The light emitting element of  claim 1 , wherein the substrate layer is made of glass, plastic or conductive metal oxide. 
     
     
         11 . The light emitting element of  claim 1 , wherein the substrate layer or the first metal layer is an anode, the second metal layer is a cathode, and the organic material layer further includes a hole injection sublayer, a hole transport sublayer, a light emitting sublayer, an electron transport sublayer and an electron injection sublayer that are sequentially stacked from the anode to the cathode. 
     
     
         12 . The light emitting element of  claim 1 , wherein the first metal layer and the second metal layer are made of metal or nano metal oxide. 
     
     
         13 . The light emitting element of  claim 1 , wherein the first range is a green light band, the second range is a red light band, the third range is a blue light band, the light emitting element emits white light composed of green, red, and blue light, and a ratio of the green, the red, and the blue light is changed by adjusting the portion of the surface of the substrate layer that is covered by the first metal portion, and the second metal portion, and the remaining portion of the surface of the substrate layer that is exposed from the opening portion. 
     
     
         14 . The light emitting element of  claim 1 , wherein the first metal portion or the second metal portion constitute a periodic structure, such that the peak wavelengths of the light within the first range, the second range or the third range generates a gain, and the periodic structure has a size between 40 nm and 437 nm and a period of the periodic structure is between 50 nm and 965 nm.