{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Menendez-Velazquez A"],"funding":["FICYT- Consejería de Ciencia, Innovación y Universidad - Gobierno del Principado de Asturias"],"pagination":["1680"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8911033"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["15(5)"],"pubmed_abstract":["Solid-state lighting (SSL) sources based on light-emitting diodes represent the new generation of highly efficient illumination systems that significantly impact energy-saving. The development of white light-emitting diodes (WLEDs) with a combination of high color rendering index (CRI) and high deep-red color rendering R9 is an important challenge in the field of solid-state lighting. On the other hand, most WLEDs use rare-earth inorganic luminescent materials. The annual demand for rare-earth metals has doubled to 125,000 tons in 15 years, and the demand is projected to reach 315,000 tons in 2030. The explosion in demand for these materials, combined with a monopolistic supply source, represents a real risk for the development of WLEDs in the next few years. Luminescent organic materials are a relevant and promising alternative. Here, we report a WLED with a very high CRI of 95.7 and R9 of 78.7, obtained using a combination of a blue LED chip (excitation source) and two organic luminescent dyes (Coumarin 6 and Lumogen Red) acting as spectral converters in a multilayer remote phosphor configuration. To the best of our knowledge, this is the first rare-earth-free WLED with such high values of CRI and R9."],"journal":["Materials (Basel, Switzerland)"],"pubmed_title":["Sunlike White Light-Emitting Diodes Based on Rare-Earth-Free Luminescent Materials."],"pmcid":["PMC8911033"],"funding_grant_id":["AYUD / 2021 / 57246"],"pubmed_authors":["Garcia-Delgado AB","Morales D","Menendez-Velazquez A"],"additional_accession":[]},"is_claimable":false,"name":"Sunlike White Light-Emitting Diodes Based on Rare-Earth-Free Luminescent Materials.","description":"Solid-state lighting (SSL) sources based on light-emitting diodes represent the new generation of highly efficient illumination systems that significantly impact energy-saving. The development of white light-emitting diodes (WLEDs) with a combination of high color rendering index (CRI) and high deep-red color rendering R9 is an important challenge in the field of solid-state lighting. On the other hand, most WLEDs use rare-earth inorganic luminescent materials. The annual demand for rare-earth metals has doubled to 125,000 tons in 15 years, and the demand is projected to reach 315,000 tons in 2030. The explosion in demand for these materials, combined with a monopolistic supply source, represents a real risk for the development of WLEDs in the next few years. Luminescent organic materials are a relevant and promising alternative. Here, we report a WLED with a very high CRI of 95.7 and R9 of 78.7, obtained using a combination of a blue LED chip (excitation source) and two organic luminescent dyes (Coumarin 6 and Lumogen Red) acting as spectral converters in a multilayer remote phosphor configuration. To the best of our knowledge, this is the first rare-earth-free WLED with such high values of CRI and R9.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Feb","modification":"2025-04-19T00:52:09.565Z","creation":"2025-04-07T11:46:23.672Z"},"accession":"S-EPMC8911033","cross_references":{"pubmed":["35268906"],"doi":["10.3390/ma15051680"]}}