Journal of Luminescence最新文献

{"title":"Research on the importance of substrate morphological features in high-power mode for the perovskite film’s photoluminescence stability","authors":"Wenfang Wang ,&nbsp;Xi Zhang ,&nbsp;Hang Ren ,&nbsp;Yao Wang,&nbsp;Xueyi Wang,&nbsp;Yicheng Wang,&nbsp;Yumeng Li,&nbsp;Dong Liang,&nbsp;Taizhe Zhang,&nbsp;Shuai Wang,&nbsp;Yining Mu","doi":"10.1016/j.jlumin.2025.121575","DOIUrl":"10.1016/j.jlumin.2025.121575","url":null,"abstract":"<div><div>In this work, we investigate the photoluminescence stability of CsPbBr₃ perovskite quantum dot films under high-power excitation, focusing on the critical role of substrate morphology in modulating thermal dissipation and absorptance evolution. Conventional two-dimensional substrates induce severe thermal accumulation and spectral instability during continuous wave excitation, which compromises photoluminescence efficiency and color mixing accuracy in white-light communication. To overcome these challenges, we propose a novel three-dimensional microporous waveguide substrate combined with a method of ice-templated and spray-assisted deposition to fabricate stratified CsPbBr₃/CsPbI₂Br quantum dot films. This three-dimensional configuration enhances thermal dissipation, mitigates thermally induced degradation of perovskite quantum dots and stabilizes photoluminescence under optically modulated excitation. Experimental results show that the films based on the three-dimensional substrate exhibit a photostability threshold approximately 2.5 times higher than those based on planar substrates, demonstrating a significant enhancement in photoluminescence stability. Furthermore, the photoluminescence emission intensity is increased by approximately 4.35 times compared to the two-dimensional substrate. Notably, white-light mixing based on this structure is effectively localized in the CIE 1931 color space, with color mixing fluctuation reduced by approximately 81.68 % compared to the two-dimensional substrate. Our results demonstrate that the three-dimensional substrate, as a key determinant of photoluminescence performance, offers a promising path for the development of power-type perovskite devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121575"},"PeriodicalIF":3.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155998","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":"Bright yellow emission from self-trapped exciton in a new antimony chloride-based hybrid material [C8H10N3]2SbCl5","authors":"Abir Kessentini,&nbsp;Thameur Dammak,&nbsp;Kawthar Abid","doi":"10.1016/j.jlumin.2025.121569","DOIUrl":"10.1016/j.jlumin.2025.121569","url":null,"abstract":"<div><div>Single crystals of a hybrid organic/inorganic material (HOIM) with the formula [C₈H₁₀N₃]₂SbCl₅ were synthesized and characterized using X-ray diffraction, optical absorption, and photoluminescence spectroscopy. The crystal structure is composed of discrete [SbCl₅] units surrounded by organic (C₈H₁₀N₃) molecules, thus creating a zero-dimensional structure. For optical investigations, thin films have been prepared by spin-coating from the methanol solution of the compound. A strong yellow photoluminescence at room temperature, attributed to self-trapped excitons confined in isolated [SbCl₅]²⁻ square pyramids, is observed around 560 nm (2.21 eV) with the CIE chromaticity coordinates of (0.422, 0.534) and exciton binding energy of around 53 meV. This material shows an important photoluminescence quantum yield (PLQY) of ≈82 %. To further explore the electronic structure properties of the titled compound, Density Functional Theory (DFT) and time-dependent TD-DFT calculations were performed. A considerable correlation was observed between the theoretical results and the experimental data. This agreement is confirmed through the superposition of the experimental and theoretical absorption spectra. This calculation allowed us to plot the density of states (DOS) and determine the band gap of this material. This research successfully resulted in the development of a luminescent material with significant potential for applications in the field of photoluminescent technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121569"},"PeriodicalIF":3.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226963","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":"Concentration-dependent intra- and inter-chain charge transfer dynamics of conjugated polymers explored by transient absorption spectroscopy","authors":"Ruixiang Wu,&nbsp;Rongli Guo,&nbsp;Jiacheng Tang,&nbsp;Zhiliang Han,&nbsp;Shengzhi Wang,&nbsp;Bin Li,&nbsp;Xiangyang Miao","doi":"10.1016/j.jlumin.2025.121572","DOIUrl":"10.1016/j.jlumin.2025.121572","url":null,"abstract":"<div><div>Conjugated polymers exhibit significant application potential in the field of organic optoelectronic devices owing to their unique photophysical properties. Poly(2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylene vinylene) (MDMO-PPV) presented a distinct photoluminescence (PL) emission at the different concentration. The two PL components of intra- and inter-chain emissions at 556 nm and 592 nm can be adjusted. Ground state bleaching and stimulated emission features were observed below and after 524 nm in the transient absorption spectrum of the low MDMO-PPV concentration. As the concentration increased, the ground state bleaching feature red-shifted, indicating a reduction of the band gap. At high concentrations, intra-chain charge transfer was substituted by the inter-chain charge transfer. The lifetime of inter-chain emission turned increased due to the charge aggregation.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121572"},"PeriodicalIF":3.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155458","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":"Eco-friendly carbon dots exhibiting aqueous-stable room-temperature phosphorescence for anti-forgery and information hiding","authors":"Yanni Jie ,&nbsp;Zengbo Fan ,&nbsp;Jiang Yan ,&nbsp;Fuchun Li ,&nbsp;Ting Meng ,&nbsp;Zhenli Guo ,&nbsp;Penggao Dai","doi":"10.1016/j.jlumin.2025.121567","DOIUrl":"10.1016/j.jlumin.2025.121567","url":null,"abstract":"<div><div>Carbon dots (CDs) with room-temperature phosphorescence (RTP) characteristics have drawn considerable attention because of their broad applications in various area. However, achieving water-soluble RTP CDs remains highly challenging owing to the severe phosphorescence quenching effect caused by dissolved oxygen in aqueous solutions. Herein, a realizable strategy of attaining long-lifetime and high stability RTP CDs-based composites in aqueous solutions is proposed via constructing a rigid hydrogen-bonded network. The synthesized composites display an ultra-long phosphorescence lifetime of 1.38 s in solid state and 316 ms in aqueous phase. Moreover, the RTP emission remains visible to naked eye for up to 10 s even under strongly acidic or alkaline conditions. TEM, XRD, FT-IR, and XPS analyses confirmed the successful conjugation of cyanuric acid (CA) with carbon dots (CDs) which the rigid CA framework effectively restricted the chromophore vibrations and rotations, minimizing non-radiative recombination of triplet excitons. Finally, applications of CDs in screen printing, anti-counterfeiting and information protection were explored.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121567"},"PeriodicalIF":3.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226971","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":"Characterization of anisotropic photoluminescence properties of PMN-0.30PT-Er-Yb ceramics after electric field poling","authors":"S. Yakubu ,&nbsp;J.A. Eiras ,&nbsp;M.H. Lente","doi":"10.1016/j.jlumin.2025.121571","DOIUrl":"10.1016/j.jlumin.2025.121571","url":null,"abstract":"<div><div>The crystal structure of most ferroelectric materials can be locally distorted by changing the temperature, pressure, or by applying an electric BIAS field. Doping such ferroelectric material with rare-earth (RE) metals activates <em>f-f</em> electronic transitions, resulting in light emission. When external fields are applied to rare-earth-doped ferroelectrics (RE-F), the resulting modification in the local symmetry around the rare-earth dopant sites may promote the tuning of the photoluminescence properties of the RE-F. Such behavior opens great potential for optical applications of RE-F in photonic displays and medical ultrasonic imaging transducers. This work reports the synthesis of Er-Yb-doped PMN-0.30 PT ceramics and the characterization of their physical properties, primarily the photoluminescent ones, aiming to investigate the potential applications of such compounds in piezo-photonics and ferro-photonics devices. The room temperature up-conversion photoluminescence spectrum of the as-sintered ceramic bodies revealed two emissions at about 550 nm and 669 nm corresponding to the transition from ⁴S_3/2 → ⁴I_15/2 and ⁴F_9/2 → ⁴I_15/2 of Er³⁺ ions, respectively. Then, it was verified that the emission intensity is proportional to the nth power of the excitation intensity (<span><math><mrow><msup><mrow><mi>I</mi><mo>∝</mo><mi>P</mi></mrow><mi>n</mi></msup></mrow></math></span>), as proposed by theoretical models. The relationship: <span><math><mrow><msup><mrow><mi>I</mi><mo>∝</mo><mi>P</mi></mrow><mi>n</mi></msup></mrow></math></span>, were investigated before and after a poling process, and the results were discussed based on the anisotropy in photoluminescent properties driven by changes in the Judd-Ofelt Ω₂ intensity parameter related to the local crystal field around the RE ions in both parallel and perpendicular directions to the applied D.C. electric field.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121571"},"PeriodicalIF":3.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226848","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":"Preparation and optical properties of Na-β″-Al2O3: Ce3+ phosphors","authors":"Yingnan Dong,&nbsp;Yumeng Jia,&nbsp;Kenan Xu,&nbsp;Xu Sun,&nbsp;Jing Wang,&nbsp;Zhongxiang Shi,&nbsp;Yanchen Liu","doi":"10.1016/j.jlumin.2025.121574","DOIUrl":"10.1016/j.jlumin.2025.121574","url":null,"abstract":"<div><div>In order to expand the multi-scene application of rare earth doped luminescent materials in the field of blue light illumination, a series of Ce³⁺ doped Na-β″-Al₂O₃ phosphors were prepared by solid-state method with Na-β″-Al₂O₃ as matrix. The crystal structure, micro-morphology, optical properties and thermal stability were investigated systematically. The results show that the activated ion Ce³⁺ in the prepared Na-β″-Al₂O₃: <em>x</em>Ce³⁺ phosphor replaces the Al³⁺ (CN = 6) lattice in the crystal, and with a outstanding blue light emission. In addition, the thermal stability of Na-β″-Al₂O₃: 0.05Ce³⁺ phosphor is analyzed by variable temperature spectrum, and its luminescence intensity at 573K can reach 71.55 % at room temperature. Finally, Na-β″-Al₂O₃: 0.05Ce³⁺ phosphors are packaged with 330 nm n-UV LED chips to obtain high quality blue LED devices. With its high color rendering index (81.60), low color temperature (2886 K) and good color consistency, it provides a theoretical basis for the application of Na-β″-Al₂O₃-based phosphors in blue LED devices, and makes it show great application potential in the field of solid-state blue spectral lighting.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121574"},"PeriodicalIF":3.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156026","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":"Facile preparation of ZrO2-based composite films and their impact on OLED efficiency and color stability","authors":"Bo-Yen Lin ,&nbsp;Hsin-I Chen ,&nbsp;Su-Hua Chen ,&nbsp;Mao-Kuo Wei","doi":"10.1016/j.jlumin.2025.121566","DOIUrl":"10.1016/j.jlumin.2025.121566","url":null,"abstract":"<div><div>This study demonstrated a cost-effective strategy for fabricating ZrO₂–resin composite films as external light extraction layers for organic light-emitting devices (OLEDs). A systematic investigation was conducted to evaluate the influence of film composition and spin-coating rate on optical performance. The resulting films exhibited haze values exceeding 80 %, indicating strong light-scattering properties. When applied to white OLEDs, the ZrO₂ films enhanced device performance. As the ZrO₂ planar density of film increased, the OLED efficiency rose to a peak value, followed by a subsequent decline. A maximum device efficiency enhancement of 21.5 % was achieved at planar density of approximately 2112 particles/ <span><math><mrow><mi>μ</mi></mrow></math></span> m². Furthermore, a higher ZrO₂ planar density in the composite films was found to enhance angular color stability, as evidenced by reduced variation in CIE color coordinates over a wide viewing angle (0°–60°), thereby effectively suppressing the angular color shift of the OLEDs. These results underscored a strong correlation between nanoparticle planar density of composite film and device performance, emphasizing the importance of precise particle content control in optimizing light extraction and achieving color-stable, high-efficiency OLEDs for advanced display and lighting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121566"},"PeriodicalIF":3.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155459","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":"Ce3+:CaHfO3 thick film scintillators epitaxially grown on SrTiO3, YAlO3, and MgO substrates using chemical vapor deposition","authors":"Terumasa Oga ,&nbsp;Shunsuke Kurosawa ,&nbsp;Akihiko Ito","doi":"10.1016/j.jlumin.2025.121568","DOIUrl":"10.1016/j.jlumin.2025.121568","url":null,"abstract":"<div><div>Alkaline earth hafnate perovskite is a promising inorganic scintillator due to its high density and high stopping power; however, its high melting point and phase transitions at elevated temperatures make its crystal growth difficult. We apply chemical vapor deposition method to prepare Ce³⁺-doped CaHfO₃ (Ce³⁺:CaHfO₃) thick films on the SrTiO₃, YAlO₃, and MgO substrates. Ce³⁺:CaHfO₃ thick films were epitaxially grown on each substrate with deposition rates of 44–77 μm h⁻¹. The luminescence spectra of the films at the excitation wavelength of 340 nm showed peaks at 423 nm and 463 nm, which were attributed to the Ce³⁺ 5d → ²F_5/2 and 5d → ²F_7/2 transitions, respectively. The scintillation light yield of the Ce³⁺:CaHfO₃ thick film grown on the MgO substrate was 2900 photons per 5.5 MeV with fast decay constant of 32.1 ns.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121568"},"PeriodicalIF":3.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155461","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":"Structure and photoluminescence of dimeric europium and terbium pivalates with 1,10-phenanthroline derivatives","authors":"Konstantin P. Zhuravlev ,&nbsp;Vadim D. Savchenko ,&nbsp;Anna V. Vologzhanina ,&nbsp;Vera I. Tsaryuk","doi":"10.1016/j.jlumin.2025.121565","DOIUrl":"10.1016/j.jlumin.2025.121565","url":null,"abstract":"<div><div>The relationship between the spectroscopic and structural features of europium, terbium, and gadolinium pivalates [Ln(Piv)₃L], where Piv = (CH₃)₃C-COO^–, L = 1,10-phenanthroline and its 4-methyl-, 4,7-dimethyl-, 3,4,7,8-tetramethyl-, 5-amino-, and 5-nitro- derivatives, was studied. Crystal structures of seven new dimeric lanthanide pivalates were determined by X-ray diffraction methods. The luminescence spectra of Eu and Tb compounds, the phosphorescence spectra of Gd compounds, and the lifetimes of the electronic states ⁵D₀ (Eu³⁺) and ⁵D₄ (Tb³⁺) at 77 and 295 K were investigated. The efficiency of excitation energy transfer to Eu³⁺ and Tb³⁺ ions was analyzed depending on the relative position of the lowest excited singlet S₁ and triplet T₁ states of the ligands and resonance levels of the Ln³⁺ ions. The Judd-Ofelt intensity parameters Ω_λ for europium pivalates, the rates of radiative and nonradiative processes, and other spectroscopic characteristics were calculated. In most europium pivalates, multiphonon relaxation is the only nonradiative process contributing to the decay rate of the ⁵D₀ state. At 77 K, the calculated quantum efficiency and quantum yield of Eu³⁺ luminescence in such compounds vary within the range of 55–62 %. It was shown that the intensity of the f-f transitions of the Eu³⁺ ion in pivalates is associated predominantly with the dynamic coupling (DC) mechanism. In most terbium pivalates, in addition to multiphonon relaxation affecting the ⁵D₄ decay, the back transfer energy ⁵D₄-T₁ is also active, which leads to a reduction in the lifetime of the ⁵D₄ state at 295 K, as well as a sharp decrease in the luminescence intensity. The absence of ⁵D₄-T₁ back transfer in Tb pivalate with Phen and the high luminescence intensity are caused by the strong Tb-ligands binding.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121565"},"PeriodicalIF":3.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226966","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":"Radiophotoluminescence properties of silver-doped lithium–aluminum borate glasses","authors":"Ryoichi Morishita,&nbsp;Hiroki Kawamoto,&nbsp;Yutaka Fujimoto,&nbsp;Keisuke Asai","doi":"10.1016/j.jlumin.2025.121563","DOIUrl":"10.1016/j.jlumin.2025.121563","url":null,"abstract":"<div><div>Radiophotoluminescence (RPL) is a phenomenon in which luminescence is emitted from radiation-induced luminescent centers, known as RPL centers. Upon optical excitation, these centers are promoted to excited states and subsequently emit photoluminescence. This property has been utilized in passive dosimetry. However, only a limited number of RPL-active materials have been reported to date, making the development of new materials an important challenge. In this study, we investigated the RPL properties of silver-doped lithium–aluminum borate glasses as a potential novel RPL material.</div><div>After X-ray irradiation, the glasses exhibited dose-dependent luminescence and characteristic ESR signals, indicating the formation of Ag-related centers. The detectable dose range extended from 53.7 to 1000 Gy. Thermal annealing affected both the luminescence and ESR responses. These results suggest that Ag-doped Li–Al borate glass is a promising candidate for a reusable RPL material.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121563"},"PeriodicalIF":3.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155999","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}