Journal of Luminescence最新文献

{"title":"Investigation of ultrafast charge dynamics in aminoanthraquinone by transient absorption spectroscopy","authors":"Johar Zeb ,&nbsp;Shuai Zhang ,&nbsp;Muhammad Bilal Ahmed Qureshi ,&nbsp;Manas Kumar Mandal ,&nbsp;Qunhui Yuan ,&nbsp;Wei Gan","doi":"10.1016/j.jlumin.2025.121170","DOIUrl":"10.1016/j.jlumin.2025.121170","url":null,"abstract":"<div><div>Photoinduced intra and intermolecular charge transfer processes are vital in the solar energy conversion system. This research compared the photoinduced charge transfer processes of 1-aminoanthraquinone (AAQ) and 1,5-diaminoanthraquinone (DAAQ) molecules in ethanol using steady-state and transient absorption spectroscopic techniques, along with density functional theory (DFT) methods. The results revealed that AAQ shows greater intramolecular charge transfer (ICT) than the intermolecular charge transfer process. On the other hand, DAAQ, which has a lower solubility in ethanol and exhibits strong π-π stacking, displays higher intermolecular charge transfer processes than AAQ alongside its ICT process. The lifetimes for ICT and intersystem crossing (ISC) are shorter for DAAQ than AAQ molecules, representing their fast ICT and ISC processes. This work provides a comprehensive insight into the photoinduced intra- and intermolecular charge transfer processes of these two molecules, explaining their respective suitability as additives in photovoltaics and other optoelectronic devices due to their photoinduced charge transfer processes and structural planarity.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121170"},"PeriodicalIF":3.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552447","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}

{"title":"High performance Y4Al2O9:Eu3+ phosphors: Optical, thermal, and functional applications in w-LEDs, anti-counterfeiting and advanced forensics","authors":"R. Arunakumar ,&nbsp;M. Gagana ,&nbsp;B.R. Radha Krushna ,&nbsp;I.S. Pruthviraj ,&nbsp;G. Ramakrishna ,&nbsp;S.C. Sharma ,&nbsp;S.P.N. Choudhury ,&nbsp;E. Shanma ,&nbsp;Burnice Nalina Kumari ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;B.K. Das ,&nbsp;H. Nagabhushana","doi":"10.1016/j.jlumin.2025.121166","DOIUrl":"10.1016/j.jlumin.2025.121166","url":null,"abstract":"<div><div>In this study, un-doped and 1–5 mol % Eu³⁺ doped Y₄Al₂O₉ (YAM:Eu³⁺) phosphors are synthesized via an eco-friendly sol-gel combustion method and systematically characterized for their potential applications in white light-emitting diodes (w-LEDs), anticounterfeiting, and latent fingerprints (LFPs) detection. XRD confirmed a single-phase monoclinic structure with a <em>P</em><em>2</em>_<em>1</em><em>/</em><em>c</em> space group, and photoluminescence studies revealed a dominant red emission peak at 611 nm (^<em>5</em><em>D</em>_<em>0</em><em>→</em>^<em>7</em><em>F</em>_<em>2</em> transition) under 392 nm excitation. YAM:3Eu³⁺ phosphors exhibited exceptional thermal stability, retaining 90.56 % of their initial luminescence intensity at 420 K, with a high activation energy of 0.41 eV. The phosphors achieved a high internal quantum efficiency (<em>I</em>_<em>QE</em>) of 92.36 % and an excellent color purity (CP) of 99.4 %. When incorporated into a WLED, the phosphors demonstrated outstanding performance with CIE coordinates (0.336, 0.340), a correlated color temperature (CCT) of 5284 K, and a color rendering index (CRI) of 96, surpassing commercial counterparts, reveals that the YAM:3Eu³⁺ phosphors is highly useful for the fabrication of w-LED and display device applications. Further, the optimized phosphor is tested (under UV light of 365 nm) for the visualization of LFP and security ink on various material surfaces. YAM:3Eu³⁺ phosphors enabled high-resolution LFPs visualization with distinct Level I–III details, including ridgeoscopic features and pore characteristics, on diverse substrates. The results demonstrated that it provides an effective method for visualizing ridge patterns, offering a promising approach for applications in these areas. For anticounterfeiting applications, YAM:3Eu³⁺ phosphor-based ink exhibited strong red fluorescence under 365 nm UV light, invisible under daylight. It demonstrated excellent stability under pH variation, UV exposure, and long-term storage. These findings establish YAM:3Eu³⁺ phosphors as a multifunctional material with superior optical properties, robust thermal stability, and high applicability in advanced lighting, forensic science, and security technologies. In conclusion, YAM:3Eu³⁺ phosphors is a very promising light-emitting material for w-LED devices, w-LEDs, anti-counterfeiting (AC) and advanced forensics.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121166"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552448","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}

{"title":"Radiation induced light output enhancement of CsPbCl3 crystal","authors":"Xinlong Yan ,&nbsp;Chen Peng ,&nbsp;Weimin He ,&nbsp;Weiheng Duan ,&nbsp;Yi Lu ,&nbsp;Kan Zhang ,&nbsp;Yuzhen Jia ,&nbsp;Ruichen Wang ,&nbsp;Weihu Yang ,&nbsp;Shiguo Liu ,&nbsp;Hetong Han ,&nbsp;Zhaohui Song ,&nbsp;Fan Yang","doi":"10.1016/j.jlumin.2025.121162","DOIUrl":"10.1016/j.jlumin.2025.121162","url":null,"abstract":"<div><div>Generally, the light output (LO) of scintillators decreases after the gamma-ray irradiation. However, the LO enhancement is observed in CsPbCl₃ crystals after gamma-rays irradiation at doses of 10², 10³, 10⁴ and 10⁵ rad. A new luminescence band around 580 nm with a decay time of 12 μs is observed after the irradiation. Its intensity depends on the integrated dose of irradiation. A positive correlation between its intensity and LO is observed, illustrating the LO enhancement can be attributed to the new luminescence band. The absorption wavelength of radiation induced color centers at 2.84 eV is consistent with the excitation wavelength of the new luminescence band. There is a positive correlation between the concentration of color centers at 2.84 eV and the intensity of the new luminescence band. It indicates the new luminescence band is attributed to the luminescence of radiation induced color centers. Considering the high mobility of Cl⁻ ions in the CsPbCl₃ crystal, it is speculated the radiation induced color centers may be vacancies of Cl⁻ ions. The intensity of the new luminescence band decreases with time, which is attributed to the annihilation of radiation induced color centers at room temperature. The study provides valuable insights into the performance of CsPbCl₃ crystal under high irradiation. It also explains the abnormal LO enhancement in CsPbCl₃ crystals after gamma-ray irradiations, which may be useful to understand the defects of inorganic halide perovskite crystals.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121162"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527304","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}

{"title":"Realization of high efficiency pure red CsPbI3 quantum dot light emitting diodes by polarity screening","authors":"Changsheng Liang ,&nbsp;Zhiwei Yao ,&nbsp;Wenyuan Zhou ,&nbsp;Ming Deng ,&nbsp;Jingcheng Xu ,&nbsp;Ting Zhang ,&nbsp;Mi Ouyang ,&nbsp;Tao Sun ,&nbsp;Guohua Jia ,&nbsp;Chaoyu Xiang","doi":"10.1016/j.jlumin.2025.121161","DOIUrl":"10.1016/j.jlumin.2025.121161","url":null,"abstract":"<div><div>Perovskite quantum dots (QDs) are considered ideal materials for the next generation of light-emitting diodes (LEDs) due to their high color purity and tunable emission. The surface characteristics of QDs, especially the small-sized pure red QDs, significantly impact their optoelectronic performance, with surface defects remaining a major obstacle to achieving high-performance LEDs. Among the QDs synthesized by thermal injection, there are some QDs with poor ligand coverage and low crystallinity, and it is difficult for traditional post-treatment methods to effectively passivate these QDs. Here, we propose a new post-processing strategy using a mixed solution of isopropanol and methyl acetate to dissolve NH₄I to selectively screen small-sized QDs. This post-processing strategy can remove the low crystallinity QDs with poor ligand coverage and effectively passivate the remaining QDs in a halogen-rich environment. As a result of screening out lower-quality QDs, the overall performance of the QDs has been optimized, with the PLQY increasing from 79 % to 95 % and the lifetime improving from 12.7 ns to 13.7 ns. The EQE of devices based on the optimized QDs is 27.15 %, higher than the 19.46 % of the control devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121161"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527303","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}

{"title":"Power dependent variation in relative intensities of blue doublets in Tm doped NaYF4 nanocrystalline system","authors":"Sandeep K. Agarwalla ,&nbsp;G. Sridhar ,&nbsp;B. Dikshit ,&nbsp;V. Sudarsan","doi":"10.1016/j.jlumin.2025.121153","DOIUrl":"10.1016/j.jlumin.2025.121153","url":null,"abstract":"<div><div>Nanocrystalline β-NaYF₄ with an average crystallite size of ∼90 nm and doped with Tm³⁺ and Yb³⁺, were synthesized using the polyol method. Significant variations in intensity ratio of the blue doublets (emission peaks at 476 nm and 449 nm) and their growth rates (<span><math><mrow><mfrac><mrow><mi>d</mi><msub><mi>I</mi><mi>λ</mi></msub></mrow><mrow><mi>d</mi><msub><mi>P</mi><mi>D</mi></msub></mrow></mfrac></mrow></math></span>) as a function of power density confirm that the cross-relaxation process becomes dominant over the three-photon absorption process as power density increases. This power-induced enhancement of the cross-relaxation process is attributed to the increased steady-state population in the intermediate excited states (³H₄ and ³F_2,3 levels), thereby reducing the effective distance between excited Tm³⁺ ions in NaYF₄:Yb,Tm particles. The variation in the fractional intensity of upconversion luminescence at different wavelengths (I_λ/I_tot), combined with photoluminescence (PL) intensities in the NIR region under 808 nm excitation, further confirms existence of back energy transfer (BET) from Tm³⁺ to Yb³⁺ ions. Additionally, the measured lifetimes of the ¹D₂, ¹G₄, and ³H₄ states support the occurrence of the BET process. Temperature-dependent PL studies of β-NaYF₄:Yb,Tm(19:1) particles show variations in the intensity ratio associated with Stark sub-level transitions (¹G_4(1,2) → ³H₆), resulting in absolute (S_a) and relative (Sᵣ) temperature sensitivities of 0.81 % K⁻¹ and 1.3 % K⁻¹ respectively.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121153"},"PeriodicalIF":3.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563365","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}

{"title":"Photoinduced intramolecular charge transfer precedence over Enol-Keto isomerization in a molecular system: Spectroscopic exploration","authors":"Souvik Santra,&nbsp;Atanu Panja,&nbsp;Indrani Das,&nbsp;Najnin Mandal,&nbsp;Rintu Mondal,&nbsp;Nikhil Guchhait","doi":"10.1016/j.jlumin.2025.121152","DOIUrl":"10.1016/j.jlumin.2025.121152","url":null,"abstract":"<div><div>In this article we report excited state properties of Methyl-4-(diphenylamino)-2-hydroxybenzoate (<strong>DPHB</strong>), a newly-designed synthetic molecule having both the intramolecular charge transfer (ICT) and excited state intramolecular proton transfer (ESIPT) sites. Competitive photoinduced processes in this molecular system have been extensively studied in different solvents with varying polarity, hydrogen bonding capability using steady state absorption and emission and time-resolved emission spectroscopy. Spectral comparison of <strong>DPHB</strong> with two other more or less similar synthetic compounds 4-(diphenylamino)-2-methoxybenzoate (<strong>DPMB</strong>) and methyl 4-(diphenylamino)benzoate (<strong>DPB</strong>), both with only charge transfer channel and with Methyl salicylate (<strong>MS</strong>) having only proton transfer channel supports preferential charge transfer over proton transfer (PT) reaction in <strong>DPHB</strong>. The molecule <strong>DPHB</strong> shows high energy emission from the locally excited state (∼400 nm) and solvent dependent Stokes shifted charge transfer emission (&gt;450 nm) in polar aprotic solvents where ICT emission is slower (&gt;6ns) than the emission from the locally excited state (&lt;2ns). The dynamics of the excited state is comparatively faster in polar protic solvents due to solute-solvent H-bonding interaction. Structural calculation and theoretical PECs both along the donor twist coordinate and PT coordinate at Density Functional Theory (DFT) level also supports favourable charge transfer with low excited state energy barrier.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121152"},"PeriodicalIF":3.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526699","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}

{"title":"Efficient all-solution-processed and color-purity (over 800 nm) near-infrared polymer light-emitting diode (NIR-PLED) based on [Ir(C^N)2(N^O)]-bis-heteroleptic Ir(III)-complexes with different N^O-ancillary ligands","authors":"Youquan Chen ,&nbsp;Yu Chen ,&nbsp;Tiendrebeogo Salamata,&nbsp;Sicheng Yao,&nbsp;Chunmei Yuan,&nbsp;Xingqiang Lü,&nbsp;Guorui Fu","doi":"10.1016/j.jlumin.2025.121148","DOIUrl":"10.1016/j.jlumin.2025.121148","url":null,"abstract":"<div><div>The development of efficient all-solution-processed color-purity Ir(III)-complex-based NIR-PLEDs especially with maximum emission wavelength over 800 nm is under-explored. In this study, using the highly rigid <strong>Htbpz</strong> (tribenzo[a,c,i]phenazine) as HC^N main ligand, three new Ir(III)-complexes [Ir(tbpz)₂(Lⁿ)] (n = 1–3; <strong>1</strong>–<strong>3</strong>) with comparable color-purity NIR-emissions peaking at 833 nm, were developed. Moreover, based on the doping of the efficient (<em>Φ</em>_PL = 2.5 %) [Ir(tbpz)₂(L³)] (<strong>3</strong>) and usage of a polymeric electron-transport layer, the first-example of all-solution-processed color-purity (<em>λ</em>_em = 835 nm) Ir(III)-complex-based NIR-PLED endowing the <em>η</em>_EQE^Max of 0.41 %, was realized. This work can pave one way to Ir(III)-complexes for all-solution-processed color-purity NIR-PLEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121148"},"PeriodicalIF":3.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520575","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}

{"title":"Multi-stimuli-responsive hybrid MOFs loaded with spiropyran for optical information encryption and anticounterfeiting applications","authors":"Fucheng Yun ,&nbsp;Feiyang Cheng ,&nbsp;Bokun Lin ,&nbsp;Meichen Jin ,&nbsp;Jian Han ,&nbsp;Chen Shi","doi":"10.1016/j.jlumin.2025.121150","DOIUrl":"10.1016/j.jlumin.2025.121150","url":null,"abstract":"<div><div>Optical stimulus-responsive materials have a wide range of applications as smart material. However, most optical responsive materials have a single stimulation mode, complex preparation, and poor stability. In this study, we intentionally encapsulate a conformation-adaptable organic chromophore into the established coordination space of a flexible metal-organic framework (MOF). Through coupled structural transformations and spatial confinement, the chromophore within the MOF matrix underwent well-regulated conformational changes in response to physical and chemical stimuli, simultaneously exhibiting photoluminescence, thermo-, and solvato-chromism with color tunability in the visible spectrum. The π-π stacking self-assembly of benzene ring complexes, along with the adsorption of spiropyran (SP), enabled all color modulations to operate in a sensitive and self-reversible manner, each demonstrating a linear correlation between the emission maximum and the stimulus. This study elucidates the mechanisms of color change dominated by hybrid metal-organic frameworks (MOFs) and adsorption composites in the context of stimulus-responsive materials. Furthermore, this method provides a new platform for the future design of multi-stimulated tunable luminescent and color materials, leveraging weak intermolecular interactions between host and guest molecules. Optical information encryption and anticounterfeiting fabric preparation further demonstrates its utility.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121150"},"PeriodicalIF":3.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534384","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}

{"title":"[Ir(C1^N1)(C2^N2)(O^O)]-tris-heteroleptic and [Ir(C1^N1)2(O^O)]-bis-heteroleptic Ir(III)-complexes with one or two color-responsible HC1^N1 ligands towards efficient color-purity near-infrared (NIR) phosphorescence","authors":"Yu Chen ,&nbsp;Xinyu Dong ,&nbsp;Wenjing Guo,&nbsp;Yue Zhang,&nbsp;Zhiming Zhang,&nbsp;Yiqi Zhuang,&nbsp;Xingqiang Lü,&nbsp;Guorui Fu","doi":"10.1016/j.jlumin.2025.121149","DOIUrl":"10.1016/j.jlumin.2025.121149","url":null,"abstract":"<div><div>Despite the great success of homo-/heteroleptic Ir(III)-complexes as visible-phosphors, the development of their efficient NIR-emissive (NIR = near infrared) counterparts, especially color-purity ones with full emission beyond 700 nm, is highly challenging. In the paper, a robust [Ir(C¹^N¹)(C²^N²)(O^O)]-<em>tris</em>-heteroleptic molecular design strategy to [Ir(dpbq)(ppy)(acac)] (<strong>2</strong>) with single color-responsible <strong>Hdpbq</strong> ligand, is founded for desirable color-purity NIR-emission (<em>λ</em>_em^Max = <em>ca</em>. 786 nm). Importantly, owing to the augmented ³MLCT while less ³ILCT contributions to their comparable T₁ excited state, the larger quantum efficiency (<em>Φ</em>_PL = 4.9 %) of the [Ir(dpbq)(ppy)(acac)] (<strong>2</strong>) than that (3.9 %) of its [Ir(C¹^N¹)₂(O^O)]-<em>bis</em>-heteroleptic counterpart [Ir(dpbq)₂(acac)] (<strong>1</strong>) is observed. Therefore, the molecular design strategy to [Ir(C¹^N¹)(C²^N²)(O^O)]-<em>tris</em>-heteroleptic Ir(III)-complexes with one color-responsible HC¹^N¹ ligand, should pave one way to develop efficient and color-purity NIR-emitters.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121149"},"PeriodicalIF":3.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520577","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}

{"title":"A novel double-perovskite structure Mg2YVO6:Sm3+ phosphor with zero thermal quenching characteristics for w-LEDs and latent fingerprint development","authors":"Chang Zhou ,&nbsp;Leyi Zhang ,&nbsp;Huayu Sun ,&nbsp;Han Yu ,&nbsp;Likun Guan ,&nbsp;Lei Zhang ,&nbsp;Fei Li ,&nbsp;Fanzhong Zeng ,&nbsp;Xianchao Du ,&nbsp;Dan Zhang ,&nbsp;Yongqian Xu ,&nbsp;Ruijin Yu","doi":"10.1016/j.jlumin.2025.121147","DOIUrl":"10.1016/j.jlumin.2025.121147","url":null,"abstract":"<div><div>Novel orange-red Mg₂YVO₆:Sm³⁺ phosphors were synthesized via a high-temperature solid-phase reaction. The purity of Mg₂YVO₆:Sm³⁺, scanning electron microscope (SEM) image, element distribution, photoluminescence (PL), thermal stability, white light-emitting diode (w-LED) application, and so on were studied. Due to O²⁻→V⁵⁺ and O²⁻→Sm³⁺ charge transfer band (CTB), the phosphors show unique broadband excitation characteristics. Under excitation at 408 nm, the characteristic peaks were consistent with transitions from the ⁵G_5/2 to ⁶H_J (J = 5/2, 7/2, 9/2, and 11/2) energy levels at wavelengths of 565, 601, 647, and 714 nm, emitting bright orange-red light. The optimum concentration of doping was 5 mol%, and the quenching mechanism was attributed to interactions with neighboring ions. Mg₂YVO₆:5 mol%Sm³⁺ showcased remarkable thermal stability, retaining 100.2 % of its initial luminescence intensity even as the temperature escalated to 420 K. Combined with a 408 nm chip, the successfully encapsulated white LED exhibited good color rendering index (<em>R</em>_a = 85) and color temperature (CCT = 5889 K). Moreover, Mg₂YVO₆:Sm³⁺ phosphor demonstrates remarkable potential in latent fingerprint (LFP) development under ultraviolet lamp irradiation. It can assist in identifying the I-III level features in latent fingerprints and can be effectively combined with fingerprint impressions found on various everyday objects to achieve a development effect. Hence, it is evident that Mg₂YVO₆:Sm³⁺ holds significant application prospects in the fields of w-LED lighting and fingerprint recognition.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121147"},"PeriodicalIF":3.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508174","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}