Rapid synthesis of environmentally friendly submicron K2SiF6:Mn4+ phosphors: Advancing micro-LED technology

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-10-12 DOI:10.1016/j.apt.2024.104687

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Abstract

The development of light-emitting diode (LED) technology has intensified the requirements for the particle size of the K₂SiF₆:Mn⁴⁺ phosphor. However, the synthesis technology of the K₂SiF₆:Mn⁴⁺ phosphor possessing small particle sizes remains underdeveloped, rendering it difficult to fulfill the development requirements of display technology. This study presents an ammonium salt–assisted synthesis strategy for the rapid and hydrofluoric acid–free synthesis of submicron-sized K₂SiF₆:Mn⁴⁺, achieving an internal quantum yield of 98 % and average particle size of ∼ 200 nm. The synthesized material demonstrates excellent thermal stability, and its luminous intensity at 423 K is 136 % higher than that at 298 K, which is attributed to a negative thermal quenching effect. A high-performance white LED prepared using the as-developed material as the red-light-generation component exhibited a luminous efficacy of 113 lm/W and color rendering index of 93. Furthermore, the fluorescent inks developed using the prepared submicron phosphors can be utilized for screen printing. In summary, this study introduces a method for the ecofriendly, efficient, and cost-effective synthesis of submicron Mn⁴⁺-doped fluoride phosphors. Moreover, it presents a potential red fluorescent material for application in the development of full-color micro-LEDs.

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快速合成环保型亚微米 K2SiF6:Mn4+ 荧光粉：推进微型 LED 技术

发光二极管（LED）技术的发展提高了对 K2SiF6:Mn4+ 荧光粉粒径的要求。然而，具有小粒径的 K2SiF6:Mn4+ 荧光粉的合成技术仍不发达，难以满足显示技术的发展要求。本研究提出了一种铵盐辅助的合成策略，可快速、无氢氟酸地合成亚微米尺寸的 K2SiF6:Mn4+ ，内量子产率达到 98 %，平均粒径为 ∼ 200 nm。合成材料具有出色的热稳定性，其在 423 K 时的发光强度比 298 K 时高 136%，这归功于负热淬效应。使用所开发的材料作为红光生成元件制备的高性能白光 LED 的光效为 113 lm/W，显色指数为 93。此外，利用所制备的亚微米荧光粉开发的荧光油墨还可用于丝网印刷。总之，本研究介绍了一种环保、高效、低成本合成亚微米掺杂 Mn4+ 的氟化物荧光粉的方法。此外，它还提出了一种潜在的红色荧光材料，可用于开发全彩色微型 LED。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)