Journal of Solid State Chemistry最新文献

{"title":"A fluorinated star-shaped covalent organic framework for efficient iodine adsorption","authors":"Yunchao Ma ,&nbsp;Shengnan Qi ,&nbsp;Yuxin Yao ,&nbsp;Chuanxue You ,&nbsp;Chunbo Liu ,&nbsp;Baixiang Ren","doi":"10.1016/j.jssc.2024.125025","DOIUrl":"10.1016/j.jssc.2024.125025","url":null,"abstract":"<div><div>Covalent organic frameworks (COFs) are widely used for gaseous radioiodine capture through distinctive properties. Herein, 2D fluorinated imine COF (JLNU-316) was designed and constructed in this study. JLNU-316 exhibited large BET surface area of 596.25 mg²/g and pore size (2.74 and 3.78 nm), excellent thermal and chemical stability. The adsorption of iodine by JLNU-316 reached 4.08 g/g, which exceeded most of the current fluorine-containing porous iodine adsorption materials. Furthermore, the iodine adsorption capacity remains at 99 % after seven days of exposure to air conditions, and JLNU-316 maintains stable performance following ten cycles. The introduction of heteroatoms enhanced the stability of JLNU-316 and enriched the adsorption sites, thereby increasing the iodine adsorption capacity. This study guides for the design and preparation of novel iodine adsorbents.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125025"},"PeriodicalIF":3.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Homochiral Zn(Ⅱ) coordination polymers with helixes constructed from semirigid lactate deriatives for circular polarization luminescence and fluorescent prober","authors":"Zhong-Xuan Xu,&nbsp;Ya-Jia Zheng,&nbsp;Xiao-Ru Liu","doi":"10.1016/j.jssc.2024.125024","DOIUrl":"10.1016/j.jssc.2024.125024","url":null,"abstract":"<div><p>In the presence of nitrogen heterocyclic compound 2,5-di(1<em>H</em>-imidazole-1 -yl)pyridine (2,5-DIP), luminescent chiral synthons (<em>R</em>)-H₃CTA and (<em>S</em>)–H₃CTA assembled with Zn²⁺ ions to obtain enantiomers [Zn((<em>R</em>)-HCTA) (2,5-DIP)]_n (<strong>HU14<em>-R</em></strong>) and [Zn((<em>S</em>)-HCTA) (2,5-DIP)]_n (<strong>HU14–<em>S</em></strong>)) under hydrothermal condition, respectively. Partially deprotonated (<em>R</em>)-HCTA^2- anions were bridged by Zn²⁺ ions to form small left-handed (<em>R</em>)-HCTA-Zn chain in <strong>HU14-<em>R</em></strong>, while (<em>S</em>)-HCTA^2- anions and Zn²⁺ ions were connected together resulting in enantiomeric right-handed chain in <strong>HU14–<em>S</em></strong>. Moreover, larger left-handed (<em>R</em>)-HCTA-Zn-2,5-DIP chain and right-handed (<em>S</em>)-HCTA-Zn-2,5-DIP chain were found in <strong>HU14<em>-R</em></strong> and <strong>HU14–<em>S</em></strong>, respectively. These helical building blocks were joined together to create a pair of 3D frameworks with <em>dia</em> net, which show strong fluorescent characteristic and circular dichroism response. Further tests proved that <strong>HU14<em>-R</em></strong> and <strong>HU14–<em>S</em></strong> have circularly polarized light (CPL) activity and their luminescence anisotropy factors (g_1um) at 358 nm are +0.00346 and −0.00157, respectively. Moreover, as fluorescent probes, they have high stability, reliability and interference detection rate, and detection limits are up to 2.80 × 10⁻⁶ M for Cr₂O₇²⁻ and 6.19 × 10⁻⁶ M for MnO₄⁻.</p></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125024"},"PeriodicalIF":3.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing structural changes and variable range hopping conduction in Na0.5Bi0.5TiO3 perovskite: Effect of Sr2+ doping at Bi-site","authors":"Rajdip Roy,&nbsp;Abhigyan Dutta","doi":"10.1016/j.jssc.2024.125023","DOIUrl":"10.1016/j.jssc.2024.125023","url":null,"abstract":"<div><div>In this present investigation, we explored the impact of Sr²⁺ doping at the Bi-site on the structural, electrical, and optical characteristics of <span><math><mrow><msub><mtext>Na</mtext><mn>0.5</mn></msub><msub><mtext>Bi</mtext><mn>0.5</mn></msub><mtext>Ti</mtext><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> (NBT) nanomaterial. By employing the citrate auto-combustion method, we synthesized pure <span><math><mrow><msub><mtext>Na</mtext><mn>0.5</mn></msub><msub><mtext>Bi</mtext><mn>0.5</mn></msub><mtext>Ti</mtext><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span> nano-perovskites, as well as various Sr-doped counterparts. Analysis of the observed X-ray diffraction patterns through Rietveld refinement revealed a rhombohedral phase with space group R3c, although the composition doped with 10 % Sr exhibited impurity phases. The introduction of Sr²⁺ ions had a discernible influence on diverse microstructural parameters, including lattice parameters (a and c), microstrain, X-ray density, and particle size. Detailed morphological and elemental assessments were conducted utilizing TEM, FE-SEM, and EDX spectroscopy. The analysis of UV–Vis absorption spectra yielded a reduction in the optical band gap with increasing Sr addition up to 8 % doping, followed by an increase. Random Free-Energy Barrier Model (RBM) was employed to analyze complex AC conductivity. The three-dimensional Godet's Variable Range Hopping (3D G-VRH) model was also applied to elucidate the electrical transport properties.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125023"},"PeriodicalIF":3.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-pressure synthesis, crystal structure and anisotropic thermal/compressive behaviors of pseudo-ternary (V,Cr,Mo)P4","authors":"Chung-Ching Chang ,&nbsp;Takuya Sasaki ,&nbsp;Shunsuke Muto ,&nbsp;Nico Alexander Gaida ,&nbsp;Ken Niwa ,&nbsp;Masashi Hasegawa","doi":"10.1016/j.jssc.2024.125021","DOIUrl":"10.1016/j.jssc.2024.125021","url":null,"abstract":"<div><div>Pseudo-ternary CrP₄-type (V,Cr,Mo)P₄ was successfully synthesized at the conditions of 4 GPa and 900 °C by using a large volume multi-anvil-type press. SEM-EDS and STEM analyses revealed that the synthesized pseudo-ternary (V,Cr,Mo)P₄ contains almost equimolar amounts of transition metals. The lattice parameters and unit cell volume of (V,Cr,Mo)P₄ yield the average value of its end-members. The low-temperature (133 K–333 K) <em>in-situ</em> synchrotron XRD measurements demonstrated that the <em>c</em>-axis showed the highest coefficient of thermal expansion, followed by the <em>b</em>-axis and the <em>a</em>-axis. These thermal behaviors are the same as the binary end-members and pseudo-binary (V,Cr)P₄. While from the high-pressure (P &lt; 10 GPa) <em>in-situ</em> synchrotron XRD measurements, it was found that (V,Cr,Mo)P₄ showed no phase transition and compression behaviors in which the <em>c</em>-axis was more compressible than the other two axes (<em>b</em> and <em>a</em>) and the <em>b</em>-axis was slightly compressible more than the <em>a</em>-axis. The zero-pressure bulk modulus of 106 (1) GPa and 122.1 (7) GPa were obtained for (V,Cr)P₄ and (V,Cr,Mo)P₄, respectively. MoP₆ octahedral is highly distorted in comparison with VP₄ and CrP₄, thus the incorporation of MoP₄ greatly yields incompressible behaviors of CrP₄-type phosphides with respect to temperature and pressure.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125021"},"PeriodicalIF":3.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, spectral, structural and Hirshfeld surface analysis of bis(5-ammonium isophthalic acid) hexabromostannate(IV) tetrahydrate hybrid","authors":"S. Senthan ,&nbsp;S. Ananthi ,&nbsp;Aditya Ranjan ,&nbsp;A.B. Ibragimov ,&nbsp;L. Guganathan ,&nbsp;S. Bhuvaneshwari ,&nbsp;P. Suppuraj ,&nbsp;A.S. Normamatov ,&nbsp;C. Balakrishnan","doi":"10.1016/j.jssc.2024.125022","DOIUrl":"10.1016/j.jssc.2024.125022","url":null,"abstract":"<div><div>A Tin(IV)-5-ammonium isophthalic acid hybrid has been successfully synthesized at room temperature using 5-ammonium isophthalic acid hydrobromide and tin (IV) bromide as precursors. Single-crystal X-ray diffraction analysis reveals that the compound crystallizes in a triclinic system with a centrosymmetric space group Pī, where the asymmetric unit consists of one [C₈H₈NO]⁺ cation, half of a [SnBr₆]²⁻ anion, and two water molecules. The crystal cohesion is reinforced by a network of intermolecular interactions, including N–H⋯Br, O–H⋯Br, N–H⋯O, and O–H⋯O hydrogen bonds, which play a crucial role in stabilizing the crystal structure and ensuring its integrity. BVS calculations performed on SnBr₆²⁻ anion resulted in 3.95, it is conclusively shown that tin's near the formal oxidation state is 4+. At room temperature, diffuse reflectance spectral measurements indicated a band gap of 2.93 eV. The ¹H and ¹³C NMR analyses reveal distinct chemical shifts and broadening due to coupling effects, providing critical insights into the structural arrangement and interactions within the compound. Fingerprint plots have been utilized to identify and quantify the percentage of hydrogen bonding interactions.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125022"},"PeriodicalIF":3.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement of electrochemical properties of LiFe0.9Zn0.1-xMnxPO4 (x=0, 0.05, 0.075, 0.1) by double doping with Zn2+, Mn2+","authors":"Bowen Li,&nbsp;Chengyu Pan,&nbsp;Jiamin Chen,&nbsp;Haoyan Yin,&nbsp;Jiaqi He,&nbsp;Weicheng Xie,&nbsp;Yanmin Gao","doi":"10.1016/j.jssc.2024.125015","DOIUrl":"10.1016/j.jssc.2024.125015","url":null,"abstract":"<div><div>Zn²⁺ and Mn²⁺ co-doped LiFe_0.9Zn_0.1-xMn_xPO₄ (where x = 0, 0.05, 0.075, 0.1) composites are synthesized by a simple one-step hydrothermal method. The composition, structure, morphology and electrochemical properties of the materials are fully characterized using XRD, SEM, TEM, EDS, CV and AC impedance tests. The results show that the co-doping of Zn²⁺ and Mn²⁺ preserves the olivine structure of LiFePO₄ and also stabilizes the crystal structure, reduces the charge transfer resistance and improves the Li⁺ diffusion rate. When the initial specific capacity of the cathode material with the doping ratio of Zn = 0.025 and Mn = 0.075 is 161.8 mAh·g⁻¹, the discharge specific capacity after 200 cycles is still as high as 157.8 mAh·g⁻¹ with a capacity retention of 97.5 %, which is obviously better than the rest of the materials.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125015"},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systematic investigation of the influence of magnetic and non-magnetic ion substitutions in BiFeO3 under similar internal chemical pressure","authors":"Ch. Komala Lakshmi ,&nbsp;T. Durga Rao ,&nbsp;G. Bhavani ,&nbsp;M. Sudhadhar ,&nbsp;B. Sattibabu ,&nbsp;V. Satya Narayana Murthy ,&nbsp;T. Karthik ,&nbsp;Saket Asthana","doi":"10.1016/j.jssc.2024.125019","DOIUrl":"10.1016/j.jssc.2024.125019","url":null,"abstract":"<div><div>Polycrystalline Bi_1-xR_xFeO₃ (R<img>Ho and Y, x = 0.00, 0.05 and 0.10) compounds were prepared to perform a systematic investigation of the role of chemical nature and effect of internal chemical pressure on the structural, microstructural, magnetic, electric, ferroelectric and optical properties of the compounds. Structural analysis revealed that lattice distortions observed in Ho and Y-substituted compounds were not the same. The lattice parameters were larger in the case of the Y-substitution compared to the Ho-substituted counterpart. Scanning electron micrographs confirmed the formation of dense, well-connected grains exhibiting a reduction in size with increasing substitution. The magnetic properties of BiFeO₃ were enhanced through the suppression of the spin structure with the substitution. The substitution of magnetic (Ho³⁺) ions led to an improvement in remanent magnetization and coercive field, whereas the substitution of non-magnetic (Y³⁺) ions resulted in enhanced maximum magnetization with negligible coercive field at room temperature. The ferroelectric measurements evidenced that both remanent polarization and coercive fields improved in substituted compounds, attributed to a decrease in charge carriers. Furthermore, the Y³⁺ ion substitution positively influenced ferroelectric properties by reducing leakage currents compared to the Ho³⁺ ion substitution. The optical absorption measurements indicated a decrease in the energy band gap of BiFeO₃ with substitution, implying alterations in the material's optical characteristics. The <em>ac</em> conductivity studies demonstrated a discernible reduction in the conductivity of the substituted compounds. Specifically, Ho-substitution exhibited a more pronounced magnitude in the decline in conductivity relative to Y-substitution. This outcome signifies the potential efficacy of Ho-substitution in exerting control over the insulating characteristics of the compounds.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125019"},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of AgInSe2 nanoparticles to boost the power conversion efficiency of CdS QDs-sensitized solar cells","authors":"Moniba Ahmadi,&nbsp;Maziar Marandi","doi":"10.1016/j.jssc.2024.125020","DOIUrl":"10.1016/j.jssc.2024.125020","url":null,"abstract":"<div><div>In this study, bandgap engineering was utilized to assess the efficiency of photoanodes incorporating CdS nanocrystals and AgInSe₂ (AISe) quantum dots (QDs) in quantum dot-sensitized solar cells (QDSSCs). Initially, the deposition of CdS(Xc) nanocrystal layers on a TiO₂ substrate was tested using the SILAR method with varying cycles (X = 1–6). Optical transmission analysis revealed a redshift in the absorption edge and reduced transmission with an increasing number of cycles. J-V analysis of TiO₂ NCs/CdS(Xc) photoanodes identified cycle X = 5 as optimal. The short-circuit current density (J_sc), open-circuit voltage (V_oc), fill factor (FF) and maximum power conversion efficiency (PCE) were 15.5 mA/cm², 614 mV, 40 %, and 3.76 %, respectively. Subsequently, pre-synthesized AISe QDs were deposited on TiO₂ nanocrystals/CdS(Xc) photoanodes, exhibiting a single absorption edge with a bandgap energy of 2.19 eV for all photoanodes. The TiO₂ NCs/CdS(5c)/AISe/ZnS photoanode showed an increase in J_sc and efficiency, reaching 17.25 mA/cm² and 4.27 %, respectively. Utilizing sub-micron-sized TiO₂ hollow spheres (HSs) as a light-scattering layer further enhanced light absorption and performance. It was demonstrated that this approach increased the photovoltaic parameters to a J_sc of 19.12 mA/cm², FF of 43 %, and an overall efficiency of 4.75 %.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125020"},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The charge compensation mechanism and structure stability study of Li2Mn15/16TM1/16O3 (TM=Cr, Mo, W)","authors":"Hui Liu ,&nbsp;Zhiqiang Li ,&nbsp;Xilin Wang ,&nbsp;Jianan Wang ,&nbsp;Hualong Tao ,&nbsp;Yan Cui ,&nbsp;Yao Liang ,&nbsp;Teng-Fei Lu ,&nbsp;ZhiHua Zhang ,&nbsp;Ming He ,&nbsp;Bo Song ,&nbsp;Alexander Nikiforov","doi":"10.1016/j.jssc.2024.125018","DOIUrl":"10.1016/j.jssc.2024.125018","url":null,"abstract":"<div><div>Density functional theory (DFT) and ab initio molecular dynamics (AIMD) methods were used to study the charge compensation mechanism and structure stability of Li₂Mn_15/16TM_1/16O₃ (TM = Cr, Mo, W). The O loss and phase transition caused by Mn migration during the delithiation process were investigated. With the increasing of periodicity of the doped element, the charge provided by O is suppressed and O loss is inhibited. The charge providing ability of doping element as the oxidation center is weakened, and the function of activating Mn to provide charge is strengthened. The introduction of the doped elements is beneficial to the electrochemical performance, but it can induce unfavorable phase transitions. The established relationship between cathode material composition and electrochemical performance provides guidelines toward future material screen and design of lithium-ion batteries.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125018"},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A red-emitting phosphor Na3AlF6:Mn4+: Green synthesis, optical characteristics, thermal stability and application in high-performance warm WLED","authors":"Yang Xu,&nbsp;Haiqing Su,&nbsp;Yan Gao,&nbsp;Song Zhang,&nbsp;Long Li,&nbsp;Feng Hong,&nbsp;Yuting Xu,&nbsp;Dechuan Yu,&nbsp;Hai Lin","doi":"10.1016/j.jssc.2024.125016","DOIUrl":"10.1016/j.jssc.2024.125016","url":null,"abstract":"<div><p>Mn⁴⁺-doped fluoride red phosphors have been widely used in warm WLEDs, but the preparation of such phosphor requires the use of a large amount of HF as a fluorine source and an acidic environment. How to reduce the excessive use of highly toxic HF in the preparation process and achieve green synthesis has become a hot research topic. Therefore, a simple green synthesis strategy is proposed in this work to synthesize a series of red-emitting phosphors Na₃AlF₆:Mn⁴⁺. The highly toxic HF solution is replaced by using a low toxicity reaction system (HCl/HNO₃ + NH₄F), which reduces the direct use of HF. X-ray powder diffraction, energy-dispersive X-ray spectrometer and scanning electron microscope are employed to determine the crystal structure, composition and morphology of all samples. Optical properties are characterized using excitation spectra, emission spectra and fluorescence lifetime curves. The calculation results indicate that the red-light has low correlated color temperature and the excellent color purity, and Na₃AlF₆ host can provide a strong crystal field environment for Mn⁴⁺. In addition, different aluminum sources and Mn⁴⁺ doping concentrations are used to explore the optimal preparation condition. The mechanisms of concentration quenching and thermal quenching have also been systematically explored. The stabilities of red-light emission intensity and color are investigated under the high temperature. The integral PL intensity at 423 K is 47 % of the initial value at 298 K. The activation energy, the chromaticity shift and the chromaticity coordinate variation are also systematically calculated. More importantly, a high-performance warm WLED with low correlated color temperature (CCT = 3296 K) and high color rendering index (R_a = 94.7) is achieved by using Na₃AlF₆:Mn⁴⁺ as a red-emitting material. Not only that, the warm WLED exhibits strong output stability under high driving current. The discovery of this work provides a comprehensive understanding for the rational design of high-performance Mn⁴⁺-activated fluoride red phosphors <em>via</em> a simple green synthesis strategy.</p></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125016"},"PeriodicalIF":3.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}