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Passive anti-leakage of blue light for phosphor-converted white LEDs with crystal nanocellulose materials

hal.structure.identifierDepartment of Optics and Photonics
hal.structure.identifierVietnam National University, Ho Chi Minh City / Đại học Quốc gia TP. Hồ Chí Minh [VNU-HCM]
dc.contributor.authorNGUYEN, Quang-Khoi
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGLORIEUX, Benoit
hal.structure.identifierTeam 2 LCPO : Biopolymers & Bio-sourced Polymers
dc.contributor.authorSÈBE, Gilles
hal.structure.identifierDepartment of Optics and Photonics
dc.contributor.authorYANG, Tsung-Hsun
hal.structure.identifierDepartment of Optics and Photonics
dc.contributor.authorYU, Yeh-Wei
hal.structure.identifierDepartment of Optics and Photonics
hal.structure.identifierVietnam National University, Ho Chi Minh City / Đại học Quốc gia TP. Hồ Chí Minh [VNU-HCM]
dc.contributor.authorSUN, Ching-Cherng
dc.date.issued2023
dc.identifier.issn2045-2322
dc.description.abstractEnA phenomenon known as "blue-light leakage" caused by overheating pcW-LEDs has recently been identified, and it poses a risk to users. This study focuses on investigating and optimizing a solution to address this issue. To tackle the problem of overheating and blue light leakage, we explored the application of a specific thermochromic material called crystal nano cellulose (CNC). We introduced CNC inside the epoxy lens of white LEDs. Importantly, under standard conditions, CNC has a negligible impact on the optical properties of the output white light. However, when overheating conditions arise, leading to blue light leakage, the temperature increase triggers a darkening effect in CNC. This thermochromic behavior of CNC allows it to strongly absorb the blue light, resulting in a significant suppression of the output luminous flux. As a result, the lamp dims, which not only prevents the user's eyes from being exposed to harmful bluish light but also serves as an indicator of aging in the pcW-LED. By implementing CNC as a responsive material in the design of white LEDs, this study offers a practical and effective solution to mitigate the negative effects of blue-light leakage caused by overheating. This improvement enhances the safety and comfort of users while also providing an early warning system for the aging of pcW-LEDs.
dc.language.isoen
dc.publisherNature Publishing Group
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enPc-WLEDs
dc.subject.enPhosphor temperature
dc.subject.enNoncontact and instant detection
dc.title.enPassive anti-leakage of blue light for phosphor-converted white LEDs with crystal nanocellulose materials
dc.typeArticle de revue
dc.identifier.doi10.1038/s41598-023-39929-2
dc.subject.halChimie/Matériaux
dc.subject.halSciences de l'ingénieur [physics]/Optique / photonique
bordeaux.journalScientific Reports
bordeaux.page13039
bordeaux.volume13
bordeaux.peerReviewedoui
hal.identifierhal-04184263
hal.version1
hal.invitednon
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04184263v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scientific%20Reports&rft.date=2023&rft.volume=13&rft.spage=13039&rft.epage=13039&rft.eissn=2045-2322&rft.issn=2045-2322&rft.au=NGUYEN,%20Quang-Khoi&GLORIEUX,%20Benoit&S%C3%88BE,%20Gilles&YANG,%20Tsung-Hsun&YU,%20Yeh-Wei&rft.genre=article


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