Synthesis and luminescence properties of yellow-emitting LiGd6(BO3)3O5:Dy3+ borate phosphors with good thermal stability for white LEDs

Zheng, Lingling; Li, Wanqing; Hu, Wen-Feng; Deng, Bin

doi:10.1007/s10854-022-08489-y

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…Light-emitting diodes (LEDs) are widely used as a new generation of lighting sources, with compact size, minimal energy consumption, and numerous other advantages. , Various materials, such as rare-earth phosphors, − semiconductor quantum dots, − and perovskite-based materials, have been successfully developed for high-performance photoluminescent LEDs. Nevertheless, the practical utility of these materials has been constrained by the inherent heavy metal pollution and suboptimal environmental stability.…”

Section: Introductionmentioning

confidence: 99%

One-Step Extrusion Preparation for Low-Cost Multicolored Carbon Dot Fluorescent Films

Zhang,

Sha,

Qing

et al. 2024

ACS Appl. Mater. Interfaces

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Carbon dots (CDs), an emerging class of environmentally friendly luminescent materials, have been extensively applied in full-color display of lightemitting diodes (LEDs). However, the synthesis of CDs usually requires high pressure, and the conventional preparation of CD-based LED films involves intricate manufacturing techniques. The resulting security risk and high cost restrict the further application of CD-based LEDs. Here, we present a cost-effective method to obtain CD-based LED films via in situ extrusion in a twin-screw extruder. By finetuning the extrusion temperature, we created blue-emitting LEDs. The resulting fluorescent films exhibited remarkable stability, retaining 94% fluorescence intensity after 180 days of storage. We also prepared yellow, pure white, and cool white LEDs with malleable shapes, validating the versatility of the in situ extrusion method. More importantly, the manufacturing cost for CD-based films amounts to only about 0.8 RMB/g, which is substantially lower than that of the reported preparation methods. This work offers a cost-effective, safe, and massive approach to preparing photoluminescent LEDs, paving the way for the development of more sustainable and efficient CD-based LEDs.

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