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Glass substrate coated with a high-index layer under an electrode coating, and organic light-emitting device comprising such a substrate

  • US 9,108,881 B2
  • Filed: 01/12/2011
  • Issued: 08/18/2015
  • Est. Priority Date: 01/22/2010
  • Status: Expired due to Fees
First Claim
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1. A glass substrate comprising a first face and a second face opposing the first face, said substrate comprising, above the second face, an electrode layer which comprises an electrically conducting layer, wherein said substrate comprises, between the second face and the electrode layer, a plurality of layers of vitreous material each having a different index, a layer of vitreous material disposed in the direction of said second face of the substrate having an index lower than that of another layer of vitreous material disposed in the direction of said electrode layer, wherein a first layer of vitreous material of the plurality of layers of vitreous material has an index in the range from 1.7 to 2.4 and comprises from 40% to 60% by weight of bismuth oxide Bi2O3 and, from 5% to 30% by weight, of ZnO and wherein a second layer of the vitreous material of the plurality of layers of vitreous material is different from the first layer of vitreous material and comprises from 5% to 30% by weight of ZnO.

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