1. Sol–gel matrix for YAG:Ce phosphors in pc-LEDs
- Author
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Tero Pilvi, Nusret Sena Güldal, Manfred Römer, Riina Ritasalo, Peer Löbmann, Florian Peskoller, Alfred Lell, Gerhard Domann, Gertrud Kräuter, and Angela Eberhardt
- Subjects
Materials science ,business.industry ,Phosphor ,General Chemistry ,Sol gel matrix ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,law.invention ,Biomaterials ,Matrix (chemical analysis) ,chemistry.chemical_compound ,Silicone ,chemistry ,law ,Materials Chemistry ,Ceramics and Composites ,Optoelectronics ,business ,Deposition (law) ,Light-emitting diode - Abstract
Sol–gel formulations were applied to replace silicone as matrix material for phosphors in pc-LEDs. The content of organic groups was minimized in order to reduce yellowing during the operation of the elements. It was possible to evenly embed YAG:Ce particles in sol–gel binders. Further processing on LED chips resulted in operational light sources; and their performance was compared to standard silicone-based elements. Additional deposition of ALD laminates seals possible defects within the sol–gel matrix as additional protection of the phosphors and the underlying LEDs.
- Published
- 2021
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