Organic light emitting device having a protective barrier

Abstract

In an organic light emitting device package including a plurality of layers of materials formed on a substrate the plurality of layers of materials including an organic light emitting layer a protective barrier for protecting the organic light emitting device from environmental degradation the protective barrier comprising a first semi-crystalline parylene-based layer an inorganic barrier layer and a second semi-crystalline parylene-based layer.

1 . In an organic light emitting device package including a plurality of layers of materials formed on a substrate, the plurality of layers of materials including an organic light emitting layer, a protective barrier for protecting the organic light emitting device from environmental degradation, the protective barrier comprising:
 a first semi-crystalline parylene-based layer;   an inorganic barrier layer; and   a second semi-crystalline parylene-based layer.   
   
   
       2 . The protective barrier of  claim 1 , wherein at least one of the first semi-crystalline parylene-based layer and the second semi-crystalline parylene-based layer includes at least one material selected from the group consisting of parylene, partially fluorinated parylene, and fully fluorinated parylene. 
   
   
       3 . The protective barrier of  claim 1 , wherein the inorganic barrier layer is formed from at least one material selected from the group consisting of SiO 2 , aluminum oxide, SiO x N y  and Si x N y . 
   
   
       4 . The protective barrier of  claim 1 , wherein at least one of the first semi-crystalline parylene-based layer and the second semi-crystalline parylene-based layer has a crystallinity of at least 10%. 
   
   
       5 . The protective barrier of  claim 4 , wherein at least one of the first semi-crystalline parylene-based layer and the second semi-crystalline parylene-based layer has a crystallinity of at least 50%. 
   
   
       6 . The protective barrier of  claim 1 , wherein the first semi-crystalline parylene-based layer is disposed between the substrate and the inorganic barrier layer, and the second semi-crystalline parylene-based layer is disposed on an opposite side of the inorganic barrier layer and the first semi-crystalline parylene-based layer. 
   
   
       7 . The protective barrier of  claim 1 , wherein at least one of the first semi-crystalline parylene-based layer and the second semi-crystalline parylene-based layer has a thickness of between 1000-30000 angstroms. 
   
   
       8 . The protective barrier of  claim 1 , wherein the inorganic barrier layer has a thickness of between 500-5000 angstroms. 
   
   
       9 . The protective barrier of  claim 1 , wherein the plurality of layers of material in the organic light emitting device include a light emitting layer, and wherein the protective barrier is disposed between the light emitting layer and the substrate. 
   
   
       10 . The protective barrier of  claim 1 , wherein the plurality of layers of material in the organic light emitting device include a light emitting layer, and wherein the light emitting material is disposed between the protective barrier and the substrate. 
   
   
       11 . The protective barrier of  claim 1 , further comprising a reflective layer disposed between the second semi-crystalline parylene-based layer and the inorganic barrier layer. 
   
   
       12 . The protective barrier of  claim 11 , wherein the reflective layer is formed from a metal. 
   
   
       13 . The protective barrier of  claim 11 , wherein the reflective layer is formed from alternating layers of a lower refractive index dielectric material and a higher refractive index dielectric material. 
   
   
       14 . The protective barrier of  claim 1 , further comprising a hermetically sealed structure sealing the protective barrier from an external environment. 
   
   
       15 . In an organic light emitting device package including a plurality of layers of materials formed on a substrate, the plurality of layers of materials including an organic light emitting layer, a protective barrier for protecting the organic light emitting device from environmental degradation, the protective barrier comprising:
 a semi-crystalline parylene-based barrier layer; and   an inorganic barrier layer.   
   
   
       16 . The method of the  claim 15 , wherein the protective barrier layer includes a first semi-crystalline parylene-based polymer layer, an inorganic layer, and a second semi-crystalline parylene-based polymer layer.