Opto-electronic semiconductor component
View Patent ↗For improved ageing stability, an inorganic UV stabilizer, especially cerium aluminate, is added to the polymer so that the UV stability is improved.
1. An opto-electronic semiconductor component with a semiconductor body that emits electromagnetic radiation of a wavelength range with an intensity maximum at a wavelength ≧420 nm, the semiconductor body being embedded in a potting resin which comprises a UV-stable polymer based on a transparent reactive resin matrix and a UV light stabilizer,
wherein the UV light stabilizer is an inorganic material which absorbs radiation well at least in the range of from 360 to 400 nm and as far as possible only deactivates non-radiatively, the stabilizer absorbing the UV component ≦400 nm of the emission by the semiconductor body; and the proportion of the stabilizer in relation to the potting resin is from 1 to 20% by weight and
wherein the UV-stable polymer is transparent and is selected from the group of materials PMMA, polycarbonate, optical nylon, olefin copolymer, silicone material and epoxy-containing plastic.
2. The opto-electronic semiconductor as claimed in claim 1 , wherein the stabilizer is a pigment of the aluminate type with a perovskite structure without luminescent doping.
3. The opto-electronic semiconductor as claimed in claim 1 , wherein the potting resin has a converter phosphor as a further constituent.
4. The opto-electronic semiconductor as claimed in claim 3 , wherein the stabilizer:converter phosphor ratio is from 1:4 to 1:30.
5. The opto-electronic semiconductor as claimed in claim 1 , wherein a doped stabilizer, which absorbs radiation in the range of from 360 to 400 nm and re-emits at long wavelengths in the range of from 420 to 800 nm, is added as the single constituent or as a further constituent.
6. The opto-electronic semiconductor as claimed in claim 5 , wherein the doped stabilizer is a further constituent and the ratio between the undoped stabilizer and the doped stabilizer is at least 3:1.
7. The opto-electronic semiconductor as claimed in claim 5 , wherein a pigment of the BAN (Ba—Mg aluminate) type is used as the doped stabilizer.
8. The opto-electronic semiconductor as claimed in claim 1 , wherein the epoxy-containing plastic is an epoxy resin of the bisphenol or novolac type.
9. The opto-electronic semiconductor as claimed in claim 2 , wherein the pigment is cerium aluminate.