The coupling of blue emitting carbon dots with Eu<sup>3+</sup>/Tb<sup>3+</sup> co-doped luminescent glasses for utilization in white light emitting diodes

Korkmaz, Ulaş; Özlem, Beyza; Erol, Erdinç; Alaş, Melis Özge; Genç, Rükan; Ersundu, Miray Çelikbilek; Ersundu, Ali Erçin

doi:10.1039/d3cp00137g

Cited by 4 publications

(1 citation statement)

References 74 publications

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“…The as-fabricated WLED device emits intense white light when powered on ( Figure 9 d). The measured color coordinate is (0.337, 0.331), close to that of pure white light [ 44 ], which is located in the white region in CIE 1931 chromaticity diagram ( Figure 9 e). The measured CCT of the device is 5270 K, corresponding to neutral white light.…”

Section: Resultsmentioning

confidence: 95%

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Su,

Lin,

et al. 2023

Polymers

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The wide range of applications and continuous demand for plastics is causing serious global environmental problems. Massive discharges of expanded polystyrene (EPS) are thought to be primarily responsible for the increased white pollution. Waste EPS has received wide attention in the development of innovative products. White light-emitting diodes pumped by a near-UV chip (n-UV WLEDs) are regarded as a very promising solid-state lighting. The performance of the n-UV WLED is largely determined by the properties of the tricolor luminescence materials. In this work, a blue-emitting polymer film for n-UV WLED applications was developed from waste EPS. First, using waste EPS as a raw material, benzimidazole groups were bonded to PS benzene rings by chemical reactions to obtain modified PS (PS-PBI). Then, a film based on PS-PBI was prepared by a simple solution drop-casting method. The PS-PBI film can emit intense blue light when irradiated with 365 nm light. An n-UV WLED pumped by a 365 nm UV chip was fabricated using PS-PBI film as the blue-emitting layer. The fabricated n-UV WLED shows excellent luminescence properties, such as a bright white light with color coordinates of (0.337, 0.331), a relatively low color temperature (CCT, 5270 K), and an especially high color rendering index (CRI, 93.6). The results prove that the blue-emitting PS-PBI film prepared from waste EPS is a very promising candidate for n-UV WLED applications. The strategy of converting waste EPS into a high-value-added blue-emitting film in this work provides a convenient and feasible approach for upcycling waste EPS, achieving significant environmental and economic benefits.

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Section: Resultsmentioning

confidence: 95%

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Su,

Lin,

et al. 2023

Polymers

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Luminescent properties and energy transfer mechanism from Tb3+ to Eu3+ in color adjustable nano Ca5(PO4)3(OH): Eu3+,Tb3+ phosphors

Zhang,

Zhu,

Feng

et al. 2024

J Mater Sci: Mater Electron

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Sodium zinc phosphate glasses doped with Tb3+ and Tb3+/Eu3+ as multicolor phosphor for green laser stimulated emission and WLED applications

Francisco-Rodríguez,

Soriano-Romero,

Meza-Rocha

et al. 2024

Optical Materials

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

Abstract: Lanthanide-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...

Cited by 4 publications

References 74 publications

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Luminescent properties and energy transfer mechanism from Tb3+ to Eu3+ in color adjustable nano Ca5(PO4)3(OH): Eu3+,Tb3+ phosphors

Sodium zinc phosphate glasses doped with Tb3+ and Tb3+/Eu3+ as multicolor phosphor for green laser stimulated emission and WLED applications

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

Abstract: Lanthanide-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...

Cited by 4 publications

References 74 publications

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Conversion of Waste Expanded Polystyrene into Blue-Emitting Polymer Film for Light-Emitting Diode Applications

Luminescent properties and energy transfer mechanism from Tb3+ to Eu3+ in color adjustable nano Ca5(PO4)3(OH): Eu3+,Tb3+ phosphors

Sodium zinc phosphate glasses doped with Tb3+ and Tb3+/Eu3+ as multicolor phosphor for green laser stimulated emission and WLED applications

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