SEMICONDUCTOR LIGHT-EMITTING ELEMENT

• Main Author: ASANO HIDEKI
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

To provide a novel technology capable of improving extraction efficiency of ultraviolet rays emitted by a semiconductor light-emitting element, and durability.SOLUTION: A semiconductor light-emitting element 10 has: a light-emission part 12 that emits ultraviolet rays; and a coating part that covers an extraction surface 12a where the ultraviolet rays emitted by the light-emission part are extracted. The coating part includes: a resin matrix 14b that has a refractive index lower than that of an inorganic material configuring the extraction surface 12a; and a hollow body 14c that reduces the refractive index of the whole coating part by being dispersed into the resin matrix 14b. The hollow body 14c has an average particle diameter smaller than a peak wavelength of the ultraviolet rays emitted by the light-emission part 12.SELECTED DRAWING: Figure 1 【課題】半導体発光素子が発する紫外線の取り出し効率や耐久性を向上する新たな技術を提供する。【解決手段】半導体発光素子１０は、紫外線を発する発光部１２と、発光部が発する紫外線が取り出される取り出し面１２ａを覆う被覆部と、を有する。被覆部は、取り出し面１２ａを構成する無機材料の屈折率よりも低い屈折率を有する樹脂マトリックス１４ｂと、樹脂マトリックス１４ｂに分散されることで被覆部全体の屈折率を下げる中空体１４ｃと、を含有する。中空体１４ｃは、発光部１２が発する紫外線のピーク波長よりも平均粒径が小さい。【選択図】図１