Synthesis of nitride phosphor using entire oxides raw materials and their photoluminescence properties

Yang, Yuxing; Chen, Jing Jing; Li, Guanghao; Mao, Zhuo; Xu, Jizheng; Wang, Da Jian; Fahlman, Bradley D.

doi:10.1111/jace.14483

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…The Eu 3+ with other low-cost oxide raw materials (i.e., SrCO 3 and SiO 2 ) were applied in the synthesis of nitride phosphors. 132 The red luminescence of the phosphor was achieved at a controlled C/ O ratio (i.e., 1.5).…”

Section: Prospects In Display Andmentioning

confidence: 99%

“…The concentration quenching effect due to the addition of Eu 2 O 3 significantly increased the photoluminescence intensity of the glass composites. The Eu 3+ with other low-cost oxide raw materials (i.e., SrCO 3 and SiO 2 ) were applied in the synthesis of nitride phosphors . The red luminescence of the phosphor was achieved at a controlled C/O ratio (i.e., 1.5).…”

Section: Reos’ Optical Applications and Prospectsmentioning

confidence: 99%

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A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Hossain

Ahmed

et al. 2021

ACS Appl. Electron. Mater.

100

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In small- and large-scale industries, manipulable optical characteristics are desired. In this regard, rare-earth oxides (REOs) have been providing pragmatic attributes in terms of successful implementations and promising prospects throughout the last few decades. Currently, there is no comprehensive literature review on REOs that can aid researchers in focusing on industry-relevant emerging materials. Therefore, this review reports studies that have been able to experimentally utilize the physical, chemical, thermal, electronic, spectroscopic, and photocatalytic properties of REOs in the optical field. The brief and focused review finds that the most pronounced applications of REOs in the optical field are in white light and laser, while the prospective ground likely lies in optoelectronics, fiber optic applications, and miscellaneous repertoires that incorporate an innovative utilization of an electronic configuration of REOs. From the perspective of this review, the versatility of an REO in the optical field has become prominent and quantified by the successful implementations of REOs in white light and nonwhite light applications. Furthermore, the innovative applications of REOs include but are not limited to the development of solid-state optical devices, optoelectronic systems, and photocatalytic agents. Specifically, their futuristic applications are likely to be led by the development of stronger emission devices and the obtaining of flexible doping characteristics by several ions such as Li+, Eu3+, Dy3+, Nd3+, La3+, Yb3+, etc. at different levels, which will render the pathway for further exploration in this regard. However, the improvement in terms of methodological attributes requires a serious consideration of overcoming the limitation of thermal stability, lack of exploration of several types of lights, photodarkening in critical applications, lack of applicability at a wide range of temperatures, and so on. From an industrial perspective, it can be conjectured from the reported literature that the challenges will be overcome at a large scale within a few years due to the expedited technological advancements of the experimental repertoires, rendering the REO applications in the optical field reasonably economic and commercially viable. In short, this is the first review that objectively considers the applications and prospects of REOs, which will essentially invoke several studies to investigate the specific properties and viability of REOs in the optical field.

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Section: Prospects In Display Andmentioning

confidence: 99%

Section: Reos’ Optical Applications and Prospectsmentioning

confidence: 99%

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Hossain

Ahmed

et al. 2021

ACS Appl. Electron. Mater.

100

View full text Add to dashboard Cite

show abstract

“…To reduce the particle size, some low-temperature methods have been proposed for preparing the phosphor. Piao et al [19] and Yang et al [20] successfully obtained Sr 2 Si 5 N 8 :Eu 2+ phosphors at 1500-1550 ℃ by using the carbothermal reduction and nitridation (CRN) method, but the QE was significantly reduced to 28.4% due to the presence of residual carbon. Zeuner et al [21,22] used the ammothermal method to synthesize nano-sized Sr 2 Si 5 N 8 :Eu 2+ phosphors with a particle size of 200 nm at 1150-1400 ℃, but it is difficult to obtain a pure phase.…”

Section: Introduction mentioning

confidence: 99%

Fine-grained phosphors for red-emitting mini-LEDs with high efficiency and super-luminance

Kang

Tian

et al. 2022

J Adv Ceram

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Mini-LED backlights, combining color conversion materials with blue mini-LED chips, promise traditional liquid crystal displays (LCDs) with higher luminance, better contrast, and a wider color gamut. However, as color conversion materials, quantum dots (QDs) are toxic and unstable, whereas commercially available inorganic phosphors are too big in size to combine with small mini-LED chips and also have strong size-dependence of quantum efficiency (QE) and reliability. In this work, we prepare fine-grained Sr2Si5N8:Eu2+-based red phosphors with high efficiency and stability by treating commercially available phosphors with ball milling, centrifuging, and acid washing. The particle size of phosphors can be easily controlled by milling speed, and the phosphors with a size varying from 3.5 to 0.7 μm are thus obtained. The samples remain the same QE as the original ones (∼80%) even when their particle size is reduced to 3.2–3.5 μm, because they contain fewer surface suspension bond defects. More importantly, SrBaSi5N8:Eu2+ phosphors show a size-independent thermal quenching behavior and a zero thermal degradation. We demonstrate that red-emitting mini-LEDs can be fabricated by combining the SrBaSi5N8:Eu2+ red phosphor (3.5 μm in size) with blue mini-LED chips, which show a high external quantum efficiency (EQE) of above 31% and a super-high luminance of 34.3 Mnits. It indicates that fine and high efficiency phosphors can be obtained by the proposed method in this work, and they have great potentials for use in mini-LED displays.

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“…In contrast, the carbothermal reduction nitridation method uses metal oxide as raw material and graphite powder as a reducing agent, which can synthesize nitride phosphors at appropriate temperature at low cost. This strategy is a simple and facile route for the synthesis of nitrides [17] …”

Section: Introductionmentioning

confidence: 99%

“…This strategy is a simple and facile route for the synthesis of nitrides. [17] In this paper, novel SLSN:Ce 3 + ,Tb 3 + phosphors were prepared by a modified carbothermal reduction nitridation method at atmospheric pressure. X-ray diffraction results verified that the samples prepared were all pure phases without any impurities.…”

Section: Introductionmentioning

confidence: 99%

A Color‐tunable Nitride Phosphor for Near‐Ultraviolet Excitation of White Light‐emitting Diodes

Wang

Sun

Lyu

et al. 2022

Chemistry An Asian Journal

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Due to the diversity of structure and composition and the unique coordination environment, nitride materials enable the doped activator ions to possess compelling luminescence characteristics, such as rich emission colors, favorable stability and tunable emission spectra. Here, novel SrLuSi4N7:Ce3+,Tb3+ nitride phosphors were successfully synthesized by a modified carbothermal reduction and nitridation method at atmospheric pressure. SrLuSi4N7 (SLSN) belongs to hexagonal symmetry, with space group P63mc, and its crystal structure is composed of the basic building block with corner‐sharing [SiN4] tetrahedron. Under 365 nm excitation, SLSN:Ce3+ exhibits a broad emission band peaking at 450 nm with a full width at half‐maximum (FWHM) of 92 nm and the most forceful intensity obtained at the Ce3+ concentration amount of 0.04. On the basis of the efficient energy transfer, SLSN:Ce3+,Tb3+ exhibits color‐tunable emission from blue (450 nm) to green (545 nm). Our results indicate that SLSN nitride phosphor is a promising candidate for near‐ultraviolet (n‐UV) based white LEDs.

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Synthesis of nitride phosphor using entire oxides raw materials and their photoluminescence properties

Cited by 7 publications

References 26 publications

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Fine-grained phosphors for red-emitting mini-LEDs with high efficiency and super-luminance

A Color‐tunable Nitride Phosphor for Near‐Ultraviolet Excitation of White Light‐emitting Diodes

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