DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 3
·996-1003
·
IF 4
Qiang Zhang,Xin Ding,Bin Liu,Yuhua Wang
The development of novel phosphors with excellent luminescence properties for white light-emitting diodes (WLEDs) is always a formidable task. Compared with the traditional laborious and aimless “trial and error” experiments, a mineral-inspired prototype strategy can provide an efficient and accurate method. Herein, for the first time, a novel yellow-emitting phosphor NaBaY2(PO4)3:Eu2+ was discovered using the mineral-inspired prototype strategy and cation substitution method. The phosphor was prepared via the high-temperature solid-state reaction method, and its crystal structure, luminescence properties and potential application for WLEDs were systematically investigated. The NaBaY2(PO4)3 phase was derived from the K2Mg2(SO4)3-type mineral structure and a photoluminescence study revealed that the phosphor can emit bright yellow light with a maximum at 545 nm upon excitation at 351 nm. A WLED lamp was fabricated by the use of a blend of commercial blue-emitting BaMgAl10O17:Eu2+, yellow-emitting NaBaY2(PO4)3:Eu2+ and red-emitting (Ca, Sr)AlSiN3:Eu2+ phosphors with a 380 nm LED chip. The CIE, CCT, Ra and efficiency of the as-fabricated LEDs were measured to be equal to (0.366, 0.365), 4327 K, 91.2 and 40.8 lm W−1, respectively. These results suggest that NaBaY2(PO4)3:Eu2+ could be a promising candidate for n-UV WLEDs.
研究领域:
材料科学
·
无机化学
·
光电子学
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半导体照明
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发光材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 108
·期 2
·e20200
·
IF 3.5
Fei Wang,Huihui Chen,Shiwei Zhang,Huiqing Jin
The development of red phosphors with good thermal stability, high quantum yield and high color purity is still a big challenge. In this work, a series of novel red phosphors Sr 3 La 2 W 2 O 12 : x Eu 3+ (0≤ x ≤0.18, ∆ x = 0.03) were successfully prepared by high-temperature solid-phase method. The phosphors reveal a hexagonal phase with the space group of R-3 m. The phosphor Sr 3 La 2 W 2 O 12 :Eu 3+ produced narrowband red emission from 5 D 0 → 7 F 2 of Eu 3+ (616 nm) under excitation at 395 nm, 465 nm, and 533 nm. Importantly, phosphor Sr 3 La 2 W 2 O 12 :0.09Eu 3+ exhibits astonishing quantum efficiency (IQE = 89.60%, EQE = 41.52%), and it demonstrate robust thermal performance with the emission intensity retaining 92.73% at 558 K of that at 298 K. Finally, the prepared red phosphor Sr 3 La 2 W 2 O 12 :0.09Eu 3+ and yellow phosphor YAG:Ce 3+ were combined with a blue LED chip (460 nm) to form a WLED device, which presented warm white light with color coordinates of (0.3523, 0.3732), color rendering index of 83.7, and color temperature of 4826 K.
研究领域:
材料科学
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光电子学
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2653-2663
·
IF 6.4
Ruize Liu,Haiyan Wu,Shangwei Wang,Weihong Yuan,Su Zhang,Ran Pang,Lihong Jiang,Da Li,Chengyu Li,Hongjie Zhang
In this work, a series of novel, broadband, cyan-green emitting Ba3LuGa2O7.5:Bi3+ phosphors are prepared to bridge the cyan gap through a simple high-temperature solid-state reaction method. Their crystal structures, morphologies, luminescent properties, temperature-dependent emission spectra, temperature-dependent lifetime decay curves and quantum efficiencies were investigated in detail. Upon 351 nm excitation, the phosphor presents cyan-green emission with the main peak located at 500 nm, corresponding to the 3P1–1S0 transition of Bi3+ ions. The emission intensity of BLGO:0.02Bi3+ phosphors is greatly enhanced when introducing a suitable flux. The value of external quantum efficiency is advanced from 9.43% to 30.93%. According to the luminescence intensity and thermal quenching properties of the phosphor, the potential applications of BLGO:Bi3+ in the two fields of WLEDs and optical temperature sensing were explored. Since the excitation band of the phosphor can match well with that of the near-ultraviolet chip, combined with commercial phosphors, the BLGO:0.02Bi3+ phosphor is employed to obtain a full-spectrum WLED device with a higher color rendering index (CRI, Ra = 93.5), and a lower correlated color temperature (CCT, 4523 K). In the temperature range of 293 to 498 K, the relative sensitivities Sr and S are calculated to reach the maximum value of 2.05% K−1 and 2.21% K−1, respectively. These results indicated that the prepared BLGO:Bi3+ phosphors have potential application prospects as full-spectrum WLEDs and in temperature sensing.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-9
·
IF 3.159
Liu Hanxin,Sun Chun,Gao Zhiyuan,Geng Chong,Shi Shuangshuang,Wang Le,Su Sijing,Bi Wengang
Perovskite quantum dots (QDs) have been widely used in white light-emitting diodes (WLEDs), due to their high quantum yield (QY), tunable bandgap, and simple preparation. However, the red-emitting perovskite QDs are usually containing iodine (I), which is not stable under continuous light irradiation. Herein, perovskite-based WLED is fabricated by lead-free bismuth (Bi)-doped inorganic perovskites Cs 2 SnCl 6 and less-lead Mn-doped CsPbCl 3 QDs, which emits white light with color coordinates of (0.334, 0.297). The Bi-doped Cs 2 SnCl 6 and Mn-doped CsPbCl 3 QDs both show excellent stability when kept in the ambient air. As benefits from this desired characteristic, the as-prepared WLED shows excellent stability along with operating time. These results can promote the application of inorganic perovskite QDs in the field of WLEDs.
研究领域:
材料科学
·
光电
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 47
·21882-21894
·
IF 3.5
Hu Hao,Zhao Xia,Mao Xiang,Dong Yongrun,Li Wen,Xue Jinkun,Li Zequan,Gao Wei
White light-emitting diodes (WLEDs), as strong contenders for future solid-state light sources, hold significant promise in solid-state lighting due to their high efficiency, low power consumption, self-emission, and versatility. Carbon dots (CDs), a novel type of carbon nanomaterials, exhibit excellent luminescence properties. However, their intricate structure and unclear fluorescence mechanism hinder long-wavelength modulation, and solid-state aggregation leads to luminescence quenching, limiting their application in optoelectronic devices. This study focuses on the preparation of CDs with dual yellow–green emission peaks via a hydrothermal method using sodium lignosulfonate as a carbon source. The mechanism behind the dual emission is elucidated by analyzing the morphology and chemical composition of the CDs. Specifically, the green light originates from surface-related states due to N doping, while the yellow light results from the carbon-core state at higher hydrothermal temperatures. By incorporating these CDs into transparent wood, a material capable of emitting white light under blue light excitation is achieved. This transparent wood was successfully applied in the fabrication of WLEDs, providing valuable insights into CDs modulation and their utilization for white light solid-state lighting applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Nian Wang,Yu Li,Lei Yang,Yanzhi Zhang,Hao Guo,Chaoyong Deng,Ruirui Cui
To address the deficiency of red emission in commercial white light-emitting diodes, a broadband-emitting red phosphor, Ca 2 SrAl 2 O 6 : x Eu, was synthesized via a conventional solid-state reaction under a CO atmosphere. Based on the crystal structure of Ca 2 SrAl 2 O 6 , the successful incorporation of Eu ions into the host lattice was confirmed. Under 467 nm blue light excitation, the phosphor exhibited a broad emission band centered at 630 nm with a full width at half maximum of approximately 80 nm. The optimal doping concentration was determined to be x = 0.03, corresponding to an internal quantum efficiency of 41.02%. The phosphor demonstrated good thermal stability, retaining 81.43% of its initial emission intensity at 150 °C, with an activation energy for thermal quenching of 0.2725 eV. To evaluate its practical applicability, a WLED device was fabricated by combining the optimized Ca 2 SrAl 2 O 6 : 0.03Eu phosphor with a 460 nm blue LED chip. The resulting device exhibited a correlated color temperature of 4631 K and a high color rendering index of 92.8, with an R 9 value of 77.4, surpassing that of commercially available white LEDs. Moreover, the device displayed excellent stability under varying operating currents and extended operation. These results demonstrate that the Ca 2 SrAl 2 O 6 : x Eu phosphor is a highly promising candidate for advanced solid-state lighting applications.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-12
·
IF 2.8
Wu Tao,Dong Langping,Yang Shuai,Zhang Ganghua,Zhao Guoying,Hou Jingshan,Fang Yongzheng
A series of novel blue-emitting Sr 3 CeNa(PO 4 ) 3 F:Eu 2+ (SCNPOF:Eu 2+ ) phosphors were synthesized through solid-state reaction. The as-prepared phosphor shows a blue light emission ranging from 350 ~ 550 nm centered at 447 nm under 340 nm UV light excitation, attributed to the 4f-5d transition of Eu 2+ . The energy transfer mechanism from Ce 3+ to Eu 2+ was identified as dipole–dipole interaction, and the energy transfer efficiency and critical distance were calculated. Subsequently, a white light-emitting diode (WLED) with a color rendering index of 94 was fabricated by combining a 365 nm UV-LED chip with the as-prepared blue-emitting SCNPOF:Eu 2+ phosphor, commercial green (Ba, Sr) 2 SiO 4 :Eu 2+ phosphor, and red CaAlSiN 3 :Eu 2+ phosphor. The results indicate that the SCNPOF:Eu 2+ phosphors have potential application in UV-based WLEDs.
研究领域:
材料科学
·
光电子学
·
荧光粉化学
·
固态照明
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·
IF 3
Guo Wenhang,Zeng Liang,Zhang Xinyuan,Cai Xiaoyu,Su Tan,Su Zhongmin
A silicate inorganic phosphor matrix, CJU-1-Eu (K 3 EuSi 6 O 15 ), based on rice husk-derived biomass silicon, was synthesized via a hydrothermal method. The material was doped with Tb 3+ ions, and the effect of Tb 3+ concentration was investigated, resulting in a series of tunable white-light inorganic phosphors (CJU-1-Eu: x Tb 3+ ) ranging from warm white to cool white. The CJU-1-Eu:0.04Tb 3+ inorganic white-light phosphor was combined with a UV chip to produce the white-light-emitting diode (WLED) device. The device exhibited CIE coordinates of (0.332, 0.327) and the color rendering index (CRI) of 86.5 at 100 mA current. This white-light phosphor achieves both the recycling and high-value utilization of rice husk ash.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 23
·8547-8554
·
IF 6.1
Qianyi Chen,Zhenjie Lun,Dongdan Chen,Yongsheng Sun,Puxian Xiong,Siyun Li,Shanhui Xu,Zhongmin Yang
The development of extra-broadband visible emission phosphors is crucial to achieve next-generation illumination with better color experience. Herein, a defect engineering strategy mediated by the structural cationic substitution is proposed and experimentally demonstrated for specific ultra-broadband emission in a garnet phosphor. The induced oxygen vacancies and interstitial cation through lattice distortion break the periodic potential field of the crystal and provide electronic levels in the band gap. As a result, excited by blue-light-emitting diodes, the novel Y3Sc2Al3O12:B3+ shows an ultra-broad emission with a full width at half maximum (FWHM) of ∼170 nm. Compared to general defect-emitting phosphors, the unique Y3Sc2Al3O12:B3+ exhibits excellent thermal quenching resistance and superior internal quantum efficiency of up to 95%. These findings not only show great promise of Y3Sc2Al3O12:B3+ as an extra-broadband emitter but also provide a new design strategy to achieve a full-visible-spectrum phosphor in a single-component material for white-light applications.
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
C. Wang,X.Z. Zheng,L. Yue,P.J. Xia,M. Xu,W.B. Dai
The exploration of stable/efficient phosphor for n -UV chip pumped white light-emitting diodes ( w LEDs) remains an arduous task. Herein, a novel series of color tunable Eu 2+ /Tb 3+ /Sm 3+ tridoped Sc-based cyclosilicate phosphors (KBaScSi 3 O 9 : Eu 2+ /Tb 3+ /Sm 3+ ) have successfully designed and obtained via facile solid-state reaction based on comprehensive consideration of rigidly structural network of host, weak electron-phonon coupling strength and spectral adjustability of codopants via energy transfer (ET). The crystallographic occupancies of Eu, Tb and Sm primary in Ba/K, Ba and Ba sites in the monoclinic host, respectively were determined on the basis of the Rietveld refinements and crystal chemistry rules. The photoluminescence (PL) properties were systematically investigated in conjunction with structural analyses, implying that the ‘warm’ white light with excellent thermal stability is stemmed from combination of optimized blue (Eu 2+ ), green (Tb 3+ ) and red (Sm 3+ ) emissions via Eu → Tb → Sm ET strategy. Interestingly, Tb ions play both roles of green light luminescent center and ET bridge to achieve cascade ET for connecting Eu/Sm ion pairs because of the adverse metal-metal charge transfer (MMCT) effect (Eu 2+ + Sm 3+ → Eu 3+ + Sm 2+ ). Furthermore, the phosphor-converted w LEDs (pc- w LEDs), by encapsulating the optimal KBS: 4 %Eu/4 %Tb/6 %Sm with commercial n -UV LED chip, show high thermal stability with satisfactory electroluminescence (EL) performances. These results indicate the KBS: Eu/Tb/Sm phosphors are potential candidates for application in high power n -UV pumped pc- w LEDs.
研究领域:
材料科学
·
发光材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 7.4
Yifei Xu,Pengjun Zhang,Shuwei Hao,Chongqiang Zhu,Chunhui Yang
Novel double perovskite Cs 2 Na 0.7 Ag 0.3 InCl 6 : Mn 2+ material is developed. • Tunable dual emission covering full visible light range is fulfilled. • Novel perovskite material is excited by deep-ultraviolet light. • White LED with high CRI of 87.9 is fabricated by coating double perovskites and commercial BaMgAl 10 O 17 :Eu 2+ blue phosphor on deep-UV chip. The commercial potential of traditional double perovskites in white light-emitting diodes (WLEDs) has been constrained by low photoluminescence quantum yield (PLQY) and narrow emission spectrum, mainly due to parity-forbidden transitions and indirect bandgap characteristics. To address these issues, Ag + doped Cs 2 NaInCl 6 (CNIC) are synthesized via solvothermal method. Compared to the undoped sample exhibiting a low PLQY of 2.76%, Ag + doped samples show a high PLQY of 77.56%, attributing to STEs emission of 540 nm. Additionally, a series of Cs 2 Na 0.7 Ag 0.3 InCl 6 : x Mn 2+ novel materials are designed. The results demonstrate that an energy transfer pathway from STEs to Mn 2+ in co-doped system, enabling tunable dual emission across the entire visible spectrum. Notably, Cs 2 Na 0.7 Ag 0.3 InCl 6 : x Mn 2+ materials can be effectively excited by deep-ultraviolet (deep-UV) light. A WLEDs device is fabricated by coating this novel material and commercial BaMgAl 10 O 17 :Eu 2+ blue phosphor on deep-UV chip, producing warm white light with a CIE coordinate of (0.3609, 0.3576), a correlated color temperature (CCT) of 4460 K and a high color rendering index (CRI) of 87.9. These results show that Cs 2 Na 0.7 Ag 0.3 InCl 6 : x Mn 2+ novel materials have potential for application in solid-state lighting.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yun Tang,Xiaoqiang He,Yuchao Zhang,Hudie Yuan,Yalou Xin,Xiaohu Ren,Qiang Chen,Hongfeng Yin
Widespread application of YAG:Ce-based white light-emitting diodes (WLEDs) is being challenged for their poor color rendering index (CRI) and high correlated color temperature (CCT) due to the lack of red emission. Organic-inorganic hybrid perovskite nanocrystals (MAPbX 3 PNCs, X = Cl, Br, I or mixture of them), presenting high photoluminescence quantum yield, tunable emission color and simple fabrication process have been recognized as promising red-emitting component for warm WLEDs. However, additional protection process for PNCs always needed due to their poor stability, which complicates the fabrication procedures of WLEDs. Besides, nano-sized PNCs and micron YAG:Ce powder display different sinking behavior in silicone , which also hard to ensure the uniform distribution of the two components and subsequently stable optical characteristics of the device. Herein, a one-pot anchoring strategy is implemented to realize the enhanced thermal and photo-stabilities of in-situ generated red-emitting MAPbBr 0.5 I 2.5 PNCs and simultaneously strong interaction between the PNCs and YAG:Ce to form PNCs@A-YAG composite, which greatly simplifies the processes, and also avoids the uneven distribution of phosphor and PNCs in silicone . Furthermore, the WLED, fabricated by PNCs@A-YAG and a commercial blue chip, exhibits high CRI of 92, low CCT of 4755 K, and super high saturated red color R9 of 95, which are of vital importance in achieving warm white light for indoor lighting applications. This work could promote the practical application of perovskite nanocrystals in the field of high color rendering index WLEDs.
研究领域:
材料科学
·
光学工程
·
电子器件
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）