Ultraviolet emitting optical device and operating method thereof
AssigneeUniversity-Industry Cooperation Group of Kyung Hee University
InventorsYoungduck Kim, Seungmin Park
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Abstract
Provided are an ultraviolet emitting optical device and an operating method thereof. The ultraviolet emitting optical device includes a substrate, a first encapsulation layer, an active layer and a second encapsulation layer sequentially stacked on the substrate, a first electrode layer between the first encapsulation layer and the active layer, a second electrode layer between the active layer and the second encapsulation layer, and color centers provided in the active layer, wherein the active layer includes hexagonal boron nitride (hBN), wherein the color centers are configured to emit light in an ultraviolet wavelength range.
Claims19
An ultraviolet emitting optical device comprising:
- a substrate;
- a first encapsulation layer, an active layer, and a second encapsulation layer sequentially stacked on the substrate, the active layer including color centers;
- a first electrode layer between the first encapsulation layer and the active layer;
- and
- a second electrode layer between the active layer and the second encapsulation layer;
- wherein the active layer comprises hexagonal boron nitride (hBN),
- wherein a partial region of the active layer overlapping the first electrode layer and the second electrode layer in a vertical direction defines a crossing region,
- wherein the color centers of the active layer overlap an edge of the second electrode layer in the vertical direction inn the crossing region, and
- wherein the color centers of the active layer are configured to emit light in an ultraviolet wavelength range based on electric fields applied by the first and second electrode layers.
An operating method of an ultraviolet emitting optical device including a substrate, a first encapsulation layer, an active layer and a second encapsulation layer sequentially stacked on the substrate, a first electrode layer between the first encapsulation layer and the active layer, and a second electrode layer between the active layer and the second encapsulation layer, the method comprising:
- applying a first electric field between the first electrode layer and the second electrode layer to form color centers within the active layer;
- and
- applying a second electric field between the first electrode layer and the second electrode layer to excite the color centers of the active laver,
- wherein the active layer comprises hexagonal boron nitride (hBN),
- wherein a partial region of the active layer overlapping the first electrode layer and the second electrode layer in a vertical direction defines a crossing region,
- wherein the color centers of the active layer overlap an edge of the second electrode layer in the vertical direction in the crossing region,
- wherein at least a portion of a side surface of the second electrode layer defining the crossing region has a geometric pattern different from a side surface of the second electrode layer outside the crossing region, and
- wherein the excited color centers of the active layer emit light in an ultraviolet wavelength range based on the second electric field.
Dependencies are inferred from the claim text.