Journal of Luminescence最新文献_第4页

Algae derived carbon dots and its polymeric composites for white light emission 用于发射白光的藻类衍生碳点及其聚合物复合材料

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-22 DOI: 10.1016/j.jlumin.2024.120955

B.U. Mendoza Enriquez , Miriam Rangel , Y. Kumar , S. Khandual , V. Agarwal

引用次数: 0

Geometrically isomeric [Ir(C^N)(C’^N’)(N’’^O)-tris-heteroleptic [Ir(dFppy)(CN-ppz)(pic)] Ir(III)-complexes with blue-light: Forwards to efficient blue organic light-emitting diodes 具有蓝光的几何异构[Ir(C^N)(C'^N')(N''^O)-三杂环[Ir(dFppy)(CN-ppz)(pic)]Ir(III)-络合物：向高效蓝色有机发光二极管迈进

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-22 DOI: 10.1016/j.jlumin.2024.120949

Siyu Hou , Baowen Wang , Yan Zhang , Hui Chang , Xingqiang Lü , Guorui Fu , Hongyang Zhang

{"title":"Geometrically isomeric [Ir(C^N)(C’^N’)(N’’^O)-tris-heteroleptic [Ir(dFppy)(CN-ppz)(pic)] Ir(III)-complexes with blue-light: Forwards to efficient blue organic light-emitting diodes","authors":"Siyu Hou , Baowen Wang , Yan Zhang , Hui Chang , Xingqiang Lü , Guorui Fu , Hongyang Zhang","doi":"10.1016/j.jlumin.2024.120949","DOIUrl":"10.1016/j.jlumin.2024.120949","url":null,"abstract":"<div><div>Despite the great success of Ir(III)-complex-based green/red-light OLEDs (OLED = organic light-emitting diode), the realization of their efficient blue-OLEDs is far behind and challenging. Herein, using <strong>HdFppy</strong> (2-(2,4-difluorophenyl)pyridine) and <strong>CN-ppzH</strong> (4-(1<em>H</em>-pyrazol-1-yl)benzonitrile) as the HC^N/HC’^N’ ligands and <strong>Hpic</strong> (2-picolinic acid) as the N’’^O-ancillary ligand, the [Ir(C^N)(C’^N’)(N’’^O)]-<em>tris</em>-heteroleptic molecular design strategy was adopted, obtaining the two [Ir(dFppy)(CN-ppz)(pic)]-configured blue-emitting (<em>λ</em><sub>PL</sub> (photoluminescence emission peak) = 466, 496(sh) nm; <em>Φ</em><sub>PL</sub> (photoluminescence quantum efficiency) = 0.41–0.46) geometrical isomers <strong>1a</strong> and <strong>1b</strong>. Further through the doped and vacuum-deposited fabrication, their <strong>blue-OLEDs-1A/1B</strong> with the <em>L</em><sup>Max</sup> (maximum luminance) values up to 18090–22528 cd/m<sup>2</sup> and the <em>η</em><sub>EQE</sub><sup>Max</sup> (maximum external quantum efficiency) sizes of 7.99–8.42 %, were realized, respectively. This study result shows that [Ir(dFppy)(CN-ppz)(pic)]-included [Ir(C^N)(C’^N’)(N’’^O)]-<em>tris</em>-heteroleptic Ir(III)-complexes can be used as the attractive blue-phosphor candidates forwards to efficient blue-OLEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120949"},"PeriodicalIF":3.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stokes and anti-Stokes emission characteristics of Er3+/Yb3+ co-doped zinc tellurite glasses under 377 and 1550 nm excitations for solar energy conversion application 用于太阳能转换的 Er3+/Yb3+ 共掺杂锌碲玻璃在 377 和 1550 纳米激发下的斯托克斯和反斯托克斯发射特性

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-18 DOI: 10.1016/j.jlumin.2024.120948

Keenatampalle Suresh , C.R. Kesavulu , C.J. Deviprasad , Wisanu Pecharapa , Upendra Kumar Kagola , Th Tröster , C.K. Jayasankar

{"title":"Stokes and anti-Stokes emission characteristics of Er3+/Yb3+ co-doped zinc tellurite glasses under 377 and 1550 nm excitations for solar energy conversion application","authors":"Keenatampalle Suresh , C.R. Kesavulu , C.J. Deviprasad , Wisanu Pecharapa , Upendra Kumar Kagola , Th Tröster , C.K. Jayasankar","doi":"10.1016/j.jlumin.2024.120948","DOIUrl":"10.1016/j.jlumin.2024.120948","url":null,"abstract":"<div><div>One of the best rare earth combinations for down- and up-converting the solar photons is Er<sup>3+</sup>/Yb<sup>3+</sup>. Therefore, at present, by using the traditional melt quench technique, zinc tellurite glasses doped with Er<sup>3+</sup> and Er<sup>3+</sup>/Yb<sup>3+</sup> were characterised. Several methods of down-conversion that result in the emission of 1000 nm from the acceptor (Yb<sup>3+</sup>) under excitation of donor (Er<sup>3+</sup>) were studied. On the other hand, the impact of acceptor (Yb<sup>3+</sup>) concentration and excitation pump power on the excited state absorption and its influence on the up-conversion emission (1000 nm) properties were investigated in detail under 1535 nm excitation. The studies on emission and decay results are discovered to be very significant. Suggesting that these glasses when used as conversion layers, can append the conversion efficiency of Si-based solar cells.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120948"},"PeriodicalIF":3.3,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cobalt/Aluminum layered double hydroxide intercalated with rice straw based-biochar for recognizing organophosphates in cereal crops 插层钴/铝双氢氧化物与稻草基生物炭用于识别谷类作物中的有机磷酸酯

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-18 DOI: 10.1016/j.jlumin.2024.120950

Harshita Gupta , Kulwinder Kaur , Irshad Mohiuddin , Raghubir Singh , Varinder Kaur

{"title":"Cobalt/Aluminum layered double hydroxide intercalated with rice straw based-biochar for recognizing organophosphates in cereal crops","authors":"Harshita Gupta , Kulwinder Kaur , Irshad Mohiuddin , Raghubir Singh , Varinder Kaur","doi":"10.1016/j.jlumin.2024.120950","DOIUrl":"10.1016/j.jlumin.2024.120950","url":null,"abstract":"<div><div>Herein, rice straw-based biochar was intercalated with Co/Al-LDH (LDH-Biochar) using a green technique based on the co-precipitation method. LDH-Biochar was further evaluated for the naked eye detection and spectrofluorimetric analysis of dibutyl phosphate (DBP), diphenyl phosphate (DPP), and diethyl chlorophosphate (DCP), which are extensively used as pesticides and flame retardants. The material inherited a fluorescent signal with a maximum at 570 nm (λ<sub>exc</sub> = 520 nm) from the precursor ‘biochar’ and porous interactive surface from the precursor ‘LDH.’ It showed selective quenching for the organophosphates, i.e., DBP, DPP, and DCP, with a detection limit of 1.39 μM, 1.17 μM, and 1.29 μM, respectively, and the probe showed good response within the linear range of 1.9–25.3 μM. Furthermore, the method was successfully implemented to extract the organophosphates from wheat, corn, and pearl millet with recoveries in the range of 97.49–101.35 % (RSD; 0.27–3.22 %), 97.08–99.91 % (RSD; 0.27–3.17 %), and 98.18–103.54 % (RSD; 0.19–4.76 %), respectively. The outcome of this research is thus expected to help develop LDH-Biochar as a multi-analyte sensor for organophosphates (DBP, DPP, and DCP), which are extensively used as pesticides and flame retardants.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120950"},"PeriodicalIF":3.3,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel strategy for suppressing blue light hazards of white light-emitting diodes by using transparent bamboo 利用透明竹子抑制白光发光二极管蓝光危害的新策略

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-17 DOI: 10.1016/j.jlumin.2024.120942

Yaling Chai , Xiaorong Yin , Ziquan Guo , Zhong Chen , Caichao Wan

{"title":"A novel strategy for suppressing blue light hazards of white light-emitting diodes by using transparent bamboo","authors":"Yaling Chai , Xiaorong Yin , Ziquan Guo , Zhong Chen , Caichao Wan","doi":"10.1016/j.jlumin.2024.120942","DOIUrl":"10.1016/j.jlumin.2024.120942","url":null,"abstract":"<div><div>- Light-emitting diode (LED) has become the most popular lighting device in the world, but the harm of blue light brought by LEDs still remains a very important problem. The natural bamboo possesses a unique hierarchical structure and can be treated as an optical management material applied in the photoelectric device after the treatment of lignin removal or lignin modification. In this paper, we have discovered that the blue light hazards of white LEDs can be effectively suppressed after introducing the transparent bamboo (TB) based on above treatment. Five types of white LEDs are adopted for performing this study, and more than 27 % decrease of blue light hazard efficiency can be found after covering the TB processed by lignin modification and polymer impregnation, although more or less optical loss happens. This fact may be attributed to different light scattering effects of TB in the blue band and others in the visible range. After that, the circadian effects of two types of white LEDs (warm white and neutral white) while the TB is covered on them are also discussed. This work provides an effective method for suppressing blue light hazards, regulating circadian effects, and maintaining the color performance of LED lighting as much as possible.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120942"},"PeriodicalIF":3.3,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolution of micro-photoluminescence spectra of PECVD diamond microcrystals along the vertical growth direction and their dependence on CH4 concentration PECVD 金刚石微晶的微光致发光光谱沿垂直生长方向的演变及其与 CH4 浓度的关系

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-16 DOI: 10.1016/j.jlumin.2024.120943

Iu. Nasieka , V. Strel'nitskij , O. Opalev , V. Gritsina , K. Koshevyi , O. Horobei , M. Zablodskyi , V. Lozinskii , V. Temchenko

{"title":"The evolution of micro-photoluminescence spectra of PECVD diamond microcrystals along the vertical growth direction and their dependence on CH4 concentration","authors":"Iu. Nasieka , V. Strel'nitskij , O. Opalev , V. Gritsina , K. Koshevyi , O. Horobei , M. Zablodskyi , V. Lozinskii , V. Temchenko","doi":"10.1016/j.jlumin.2024.120943","DOIUrl":"10.1016/j.jlumin.2024.120943","url":null,"abstract":"<div><div>The changes in the shape of micro-photoluminescence spectra of PECVD diamond micro-crystal measured, depending on the position of the excitation laser spot along the crystallite height, were analyzed. It was ascertained that the processes of SiV defect formation non-monotonically depend on the distance from the Si substrate. At the distances of 2–20 μm the concentration of SiV defects increases, then at distances larger than 20 μm the number of SiV defects decreases. The concentration of NV<sup>−</sup> and NV<sup>0</sup> defects monotonically increases with the distance from the Si substrate. The predomination of SiV defect formation at the beginning stages of the crystal growth is explained by the substantial concentration of carbon vacancies required for their formation. With the increase in the distance from the substrate, the crystalline perfection increases, the concentration of carbon vacancies decreases and the processes of NV<sup>−</sup> and NV<sup>0</sup> defect formation dominate. The increase in CH<sub>4</sub> fraction within 0.75–6 % leads to the increase in the volume fraction of graphite-like carbon, which is the good diffusion channel for Si atoms from the substrate into the plasma. Therefore, the concentration of SiV, NV<sup>−</sup>, and NV<sup>0</sup> defects on the surface of the crystal depends on the volume fraction of graphite-like carbon defined by CH<sub>4</sub> content.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120943"},"PeriodicalIF":3.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoluminescence optical and thermal quenching in heavily doped Gd3(Ga,Al)5O12:Ce, Mg single crystals: Dependence on the Ga3+, Ce3+, and Mg2+ concentration 重掺杂 Gd3(Ga,Al)5O12:Ce、Mg 单晶中的光致发光光学和热淬灭：与 Ga3+、Ce3+ 和 Mg2+ 浓度的关系

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-16 DOI: 10.1016/j.jlumin.2024.120945

V. Babin , P. Bohacek , A. Krasnikov , M. Nikl , L. Vasylechko , S. Zazubovich

{"title":"Photoluminescence optical and thermal quenching in heavily doped Gd3(Ga,Al)5O12:Ce, Mg single crystals: Dependence on the Ga3+, Ce3+, and Mg2+ concentration","authors":"V. Babin , P. Bohacek , A. Krasnikov , M. Nikl , L. Vasylechko , S. Zazubovich","doi":"10.1016/j.jlumin.2024.120945","DOIUrl":"10.1016/j.jlumin.2024.120945","url":null,"abstract":"<div><div>Heavily doped single crystals of Gd<sub>3</sub>Ga<sub>x</sub>Al<sub>5-x</sub>O<sub>12</sub>:Ce, Mg (x = 2.46–2.95) with different concentrations of Ce (0.016–0.188 at.%) and Mg (0–0.083 at.%) are investigated by the X-ray diffraction, photoluminescence, and thermoluminescence methods. Dependences of the luminescence characteristics, as well as crystal lattice parameters and distances between the Ce<sup>3+</sup> and Mg<sup>2+</sup> ions, on the Ga, Ce, and Mg concentration are studied. Mechanisms of the processes, resulting in the photoluminescence optical and thermal quenching and acceleration of decay kinetics, and the influence of the crystal composition on these processes are discussed. The role of close {Ce<sup>3+</sup> - Mg<sup>2+</sup><sub>Ga</sub>} pairs in these processes is considered. At <em>T</em> > 400 K, the luminescence thermal quenching is caused by the crossover process, while in the 200–350 K temperature range, by the electron transfer from the 5d<sub>1</sub> excited state of Ce<sup>3+</sup> to nearby defect levels (electron traps) located between the 5d<sub>1</sub> level and the conduction band. The latter process results also in the appearance of thermally stimulated luminescence, and its efficiency depends on the Ga<sup>3+</sup> content and concentration of intrinsic defects. The optimum concentrations of Ga<sup>3+</sup> and Mg<sup>2+</sup> ions in the investigated crystals are determined.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120945"},"PeriodicalIF":3.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stable random laser of perovskite quantum dots based on SiO2-QDs-SiO2 composite nanostructure 基于 SiO2-QDs-SiO2 复合纳米结构的过氧化物量子点稳定随机激光器

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-16 DOI: 10.1016/j.jlumin.2024.120946

Lihua Ye, Shaoqiang Hong, Chunguang Lu, Qing Zhao

{"title":"Stable random laser of perovskite quantum dots based on SiO2-QDs-SiO2 composite nanostructure","authors":"Lihua Ye, Shaoqiang Hong, Chunguang Lu, Qing Zhao","doi":"10.1016/j.jlumin.2024.120946","DOIUrl":"10.1016/j.jlumin.2024.120946","url":null,"abstract":"<div><div>In recent years, metal halide perovskite has gradually become a hotspot in the field of optoelectronics. However, the inherent instability of CsPbX<sub>3</sub> quantum dots (QDs) seriously affects the amplified spontaneous emission (ASE) or lasing performance. Herein, the highly stable CsPbBr<sub>3</sub> random laser is realized in SiO<sub>2</sub>-QDs-SiO<sub>2</sub> (SQS) composite nanostructure doped with Ag nanoislands. The strong scattering generated by SQS composite nanostructure and the localized surface plasmon resonance (LSPR) of metal silver nanoislands provide optical feedback for the formation of random laser. Then a coherent random laser with low threshold (∼2.2 mJ/cm<sup>2</sup>) is obtained. SiO<sub>2</sub> microspheres anchor QDs to avoid photoinduced regeneration and fluorescence quenching caused by QDs clusters. The inner QDs of SQS are effectively protected from water erosion, thus resulting that the samples have higher water resistance. The luminescence intensity still maintains 70 % of the original intensity after 40 days with the addition of pure water. Our research provides an effective method for improving the water stability of perovskite QDs. The highly stable random laser based on perovskite quantum dot film has a wide application prospect in integrated optoelectronics, display imaging and sensing measurement.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120946"},"PeriodicalIF":3.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Narrowband-UVB-emitting gadolinium-doped yttrium oxide nanofilm on xenon excimer lamp for phototherapy 氙准分子灯上用于光疗的窄带紫外线发射钆掺杂氧化钇纳米薄膜

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-16 DOI: 10.1016/j.jlumin.2024.120944

Sanghun Byeon, Mohammad M. Afandi, Busic Kang, Jongsu Kim

{"title":"Narrowband-UVB-emitting gadolinium-doped yttrium oxide nanofilm on xenon excimer lamp for phototherapy","authors":"Sanghun Byeon, Mohammad M. Afandi, Busic Kang, Jongsu Kim","doi":"10.1016/j.jlumin.2024.120944","DOIUrl":"10.1016/j.jlumin.2024.120944","url":null,"abstract":"<div><div>The continuous utilization of ultraviolet (UV) light sources within both academic and industrial contexts necessitates the imperative advancement of alternative UV sources to replace hazardous mercury lamps. Herein, we proposed a mercury-free narrowband UVB (NB-UVB)-emitting device from Y<sub>2</sub>O<sub>3</sub>:Gd<sup>3+</sup> nanofilm on a tubular quartz substrate. The nanofilm is fabricated utilizing the spin-coating sol-gel precursor technique and is subsequently synthesized via a high-annealing temperature solid-state reaction. This synthesis resulted in the formation of a single-phase cubical structure of Y<sub>2</sub>O<sub>3</sub> characterized by a crack-free morphology. The NB-UVB radiative output with a peak at 315 nm is generated through vacuum UV-induced photoluminescence originating from the emission of Xe excimer, which subsequently excites the Gd<sup>3+</sup> luminescent centers incorporated within the Y<sub>2</sub>O<sub>3</sub> host matrix. Moreover, in a high-voltage bipolar power system operating at 19 kV and 19 kHz, the device exhibited an NB-UVB radiance output of 1.34 mW, accompanied by a power efficiency of 0.02 %, whilst preserving exceptional temporal performance. Thus, this investigation introduces an innovative perspective on a mercury-free NB-UVB-emitting device, thereby promoting further exploration into the application of UV radiation sources derived from excimer lamp technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120944"},"PeriodicalIF":3.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High color purity aluminate phosphor SryCa1-x-yAl12O19: xEu2+ for lighting and backlight display applications 用于照明和背光显示应用的高色纯铝酸盐荧光粉 SryCa1-x-yAl12O19: xEu2+

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-10-13 DOI: 10.1016/j.jlumin.2024.120941

Zhaofeng Tian, Yangai Liu, Ci'an Xie, Juyu Yang, Yukun Liu, Chenguang Yang, Ruiyu Mi, Lefu Mei

{"title":"High color purity aluminate phosphor SryCa1-x-yAl12O19: xEu2+ for lighting and backlight display applications","authors":"Zhaofeng Tian, Yangai Liu, Ci'an Xie, Juyu Yang, Yukun Liu, Chenguang Yang, Ruiyu Mi, Lefu Mei","doi":"10.1016/j.jlumin.2024.120941","DOIUrl":"10.1016/j.jlumin.2024.120941","url":null,"abstract":"<div><div>In the context of the rapid advances in electronic information technology, the advancement of novel high-efficiency narrow-band blue phosphors represents a pivotal step in the advancement of high-quality liquid crystal displays (LCDs), as well as the development of white light-emitting diodes (WLEDs) with a reduced correlated color temperature (CCT). In this study, based on the sensitivity of Eu<sup>2+</sup> emission to local environment, the alkaline earth aluminate material CaAl<sub>12</sub>O<sub>19</sub> with high structural symmetry was selected as the matrix, and the symmetry of crystal structure was improved by replacing Ca<sup>2+</sup> with Sr<sup>2+</sup>, the narrow-band emission of the phosphor is realized. The Sr<sub>0.9</sub>Ca<sub>0.09</sub>Al<sub>12</sub>O<sub>19</sub>: 0.01Eu<sup>2+</sup> (SCAO: Eu<sup>2+</sup>) phosphor exhibited narrow-band emission with the full width at half maximum (FWHM) of 45.76 nm, and the colour purity of up to 95.46 %. Moreover, the internal quantum efficiency (IQE) of SCAO: Eu<sup>2+</sup> has been demonstrated to reach 81.70 %. In addition, SCAO: Eu<sup>2+</sup> phosphor, (Ba, Sr)<sub>2</sub>SiO<sub>4</sub>: Eu<sup>2+</sup> phosphor, CaAlSiN<sub>3</sub>: Eu<sup>2+</sup> phosphor, and 275 nm UVLED chips were combined to prepare white LED devices exhibiting a low color temperature (3733 K). The three-band LEDs of SCAO: Eu<sup>2+</sup>, β-Sialon: Eu<sup>2+</sup> and K<sub>2</sub>SiF<sub>6</sub>: Mn<sup>4+</sup> exhibited a colour gamut covering 84.75 % of the National Television Standards Committee (NTSC) standard. This indicates that the phosphor possesses the characteristics of a highly effective narrow-band blue-light-emitting substance with considerable potential for utilization in lighting and backlighting displays.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120941"},"PeriodicalIF":3.3,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0