The coupling of blue emitting carbon dots with Eu3+/Tb3+ co-doped luminescent glasses for utilization in white light emitting diodes

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dc.contributor.authorKorkmaz U.
dc.contributor.authorÖzlem B.
dc.contributor.authorErol E.
dc.contributor.authorAlas M.I.
dc.contributor.authorGenç Altürk R.
dc.contributor.authorÇelikbilek Ersundu M.
dc.contributor.authorErsundu A.E.
dc.date.accessioned2024-07-22T08:03:07Z
dc.date.available2024-07-22T08:03:07Z
dc.date.issued2023
dc.description.abstractLanthanide-doped luminescent glasses have attracted tremendous attention in modern optoelectronic applications, especially for solid-state white light-emitting diodes (WLEDs). Eu3+/Tb3+ co-doped luminescent glasses are well-known to emit intense yellowish-orange light resulting from the energy transfer from green-emitting sensitizer Tb3+ ions to red-emitting activator Eu3+ ions. Obtaining highly efficient blue light from lanthanide ions remains a challenge due to their weak down-converted emission. In this work, we attempt to use the unique characteristics of blue-emitting carbon dots (BCDs), i.e., a broad emission spectrum, ease of synthesis, and high stability, to compensate for this blue light deficiency problem. Correspondingly, a new strategy is proposed by coupling BCDs with Eu3+/Tb3+ co-doped glasses for their potential utilization in WLEDs. Hence, Eu3+/Tb3+ co-doped glasses are prepared in different thicknesses, i.e., 0.8, 1, and 1.5 mm, via the conventional melt-quenching method and subsequently spin-coated with BCDs to achieve adjustable photoluminescence quantum yield (PLQY) values. Ultimately, a proof-of-concept WLED is prepared using a 0.8 mm thick BCD-coated Eu3+/Tb3+ co-doped luminescent glass exhibiting outstanding luminescence performance with a CRI value of 92, a CCT of 4683 K, color coordinates of (x = 0.3299, y = 0.3421), a satisfying PLQY value of 55.58%, and a corresponding LER value of 316 lm W−1 under the excitation of a 375 nm UV LED. BCD-coated Eu3+/Tb3+ co-doped luminescent glasses show excellent stability against photobleaching, temperature variations, and humidity. The findings of this work indicate that the coupling of BCDs with Eu3+/Tb3+ co-doped luminescent glasses holds great potential as a substitute for traditional solid-state lighting sources. © 2023 The Royal Society of Chemistry.
dc.identifier.DOI-ID10.1039/d3cp00137g
dc.identifier.issn14639076
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/12135
dc.language.isoEnglish
dc.publisherRoyal Society of Chemistry
dc.subjectCarbon
dc.subjectEmission spectroscopy
dc.subjectGlass
dc.subjectIons
dc.subjectLight emitting diodes
dc.subjectLuminescence
dc.subjectPhotobleaching
dc.subjectRare earth elements
dc.subjectBlue light
dc.subjectBlue-emitting
dc.subjectCarbon dots
dc.subjectCo-doped
dc.subjectCo-doped glass
dc.subjectLuminescent glass
dc.subjectOptoelectronic applications
dc.subjectPhotoluminescence quantum yields
dc.subjectWhite light emitting diodes
dc.subjectYield value
dc.subjectEnergy transfer
dc.titleThe coupling of blue emitting carbon dots with Eu3+/Tb3+ co-doped luminescent glasses for utilization in white light emitting diodes
dc.typeArticle

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