Single-component electroluminescent white light-emitting diodes based on zinc oxide quantum dots with high color rendition and tunable correlated color temperature

Zhao, Yongshuang; Yang, Yue; Chen, Lixiang; Jiang, Haiqin; Hu, Yuanhong; Lan, Zhaojue; Miao, Yanqin; Wang, Yude; Lei, Yanlian; Zhu, Furong

doi:10.1039/d2tc05503a

Cited by 6 publications

(1 citation statement)

References 44 publications

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“…Furthermore, a cold-white LED (Figure 6A inset) with a correlated color temperature (CCT) of 8020 K and CIE coordinates of (0.29, 0.32) (Figure 6B) was prepared by using a yellow solid-state fluorescent powder as the phosphor and combining it with a 450 nm blue chip. The cold-white LED had a high color reduction degree, which is more suitable for exhibition halls and other environments [43]. Therefore, the designed tunable CDs may have appropriate photoelectric element field applications.…”

Section: Application Of Y-cds O-cds and R-cds In Multi-color/white Ledsmentioning

confidence: 99%

Large-Scale Synthesis of Tunable Fluorescent Carbon Dots Powder for Light-Emitting Diodes and Fingerprint Identification

Zhao,

Zhang,

Wang

et al. 2023

Molecules

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The emergence and fast development of carbon dots (CDs) provide an unprecedented opportunity for applications in the field of photoelectricity, but their practicability still suffers from complicated synthesis procedures and the substrate dependence of solid-state fluorescence. In this study, we design a unique microwave-assisted solid-phase synthesis route for preparing tunable fluorescent CD powders with yellow, orange, and red fluorescence (Y-CDs, O-CDs, R-CDs) by simply adjusting the mass ratio of reactants, a method which is suitable for the large-scale synthesis of CDs. The Y-/O-/R-CDs were systematically characterized using physics and spectroscopy techniques. Based on the perfect solid-state fluorescence performance of the proposed fluorescent CD powders, the Y-/O-/R-CDs were successfully applied for the construction of multi-color and white light-emitting diode devices at low cost. Furthermore, the Y-CDs displayed much higher yield and luminous efficiency than the O-CDs and R-CDs and were further used for fingerprint identification on the surfaces of glass sheets and tinfoil. In addition, the R-CD aqueous solution fluorescence is sensitive to pH, suggesting its use as a pH indicator for monitoring intracellular pH fluctuations. The proposed series of fluorescent powders composed of CDs may herald a new era in the application of optical components and criminal investigation fields.

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Section: Application Of Y-cds O-cds and R-cds In Multi-color/white Ledsmentioning

confidence: 99%

Large-Scale Synthesis of Tunable Fluorescent Carbon Dots Powder for Light-Emitting Diodes and Fingerprint Identification

Zhao,

Zhang,

Wang

et al. 2023

Molecules

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show abstract

Synthesis and Characterizations of Novel bi-ligand TbEu(cpioa)phen Phosphors with High Quantum Efficiency for WLED Applications

Wang,

Wu,

Guo

et al. 2024

J Fluoresc

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Exploring luminescent color tunability and efficient energy transfer mechanism of a single-phased hexagonal nanophosphor for white light emitting diodes (WLEDs) application

Limbu,

Singh

2024

Journal of Alloys and Compounds

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Single-component electroluminescent white light-emitting diodes based on zinc oxide quantum dots with high color rendition and tunable correlated color temperature

Abstract: Single-component white light-emitting diodes (WLEDs) with high color rendition and adjustable correlated color temperature (CCT) are crucial to meet various lighting scenes. Unfortunately, the development of efficient electroluminescent single-component WLEDs...

Cited by 6 publications

References 44 publications

Large-Scale Synthesis of Tunable Fluorescent Carbon Dots Powder for Light-Emitting Diodes and Fingerprint Identification

Large-Scale Synthesis of Tunable Fluorescent Carbon Dots Powder for Light-Emitting Diodes and Fingerprint Identification

Synthesis and Characterizations of Novel bi-ligand TbEu(cpioa)phen Phosphors with High Quantum Efficiency for WLED Applications

Exploring luminescent color tunability and efficient energy transfer mechanism of a single-phased hexagonal nanophosphor for white light emitting diodes (WLEDs) application

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