Journal of Luminescence最新文献

{"title":"Experimental and theoretical studies of the optical properties of a pyrene dye-attached polymer for the development of thermal and chemical sensors","authors":"Debrupa Biswas,&nbsp;Pranesh Chowdhury,&nbsp;Nandagopal Bar,&nbsp;Gourab Kanti Das","doi":"10.1016/j.jlumin.2025.121105","DOIUrl":"10.1016/j.jlumin.2025.121105","url":null,"abstract":"<div><div>Dye-attached polymers (DAPs) are an emerging research field because they are suitable for sensing (temperature, chemical, biomaterial, etc.), bio-imaging, and optical devices. Herein, we report a magnificent water-soluble DAP with an excellent fluorescent quantum yield (0.2), temperature sensitivity, and chemical recognition ability. At room temperature, the facile Schiff base reaction between pyrene dye and chitosan yields the desired PACh (pyrene-attached chitosan). Theoretical studies (DFT, FMO, MEP) have been done to optimize the probe structures and explore the structure-property relationship. The well-defined temperature-dependence fluorescence leads to the development of a thermal sensor and molecular thermometer. The PACh could recognize the ceric and ferric ions sensitively.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121105"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138960","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 of novel color tunable Na2Ca(PO4)F:Eu2+,Mn2+ phosphors for sunlike LED applications","authors":"Qiliang Chen,&nbsp;Han Xu,&nbsp;Shuai Yang,&nbsp;Guoying Zhao,&nbsp;Langping Dong,&nbsp;Jingshan Hou,&nbsp;Yongzheng Fang","doi":"10.1016/j.jlumin.2025.121103","DOIUrl":"10.1016/j.jlumin.2025.121103","url":null,"abstract":"<div><div>A series of color-tunable Na₂Ca(PO₄)F:Eu²⁺, Mn²⁺ phosphors were prepared by solid state reaction. The structure, as well as the photoluminescent properties of the as-prepared phosphor were investigated. The energy transfer process between Eu²⁺-Mn²⁺ was also discussed. The phosphor demonstrates luminescence in the range of 420 nm–750 nm under UV excitation. Specifically, the emission spectra comprise green light (420–550 nm) attributed to the 4f-5d transition of Eu²⁺ ions, and orange red light (550–750 nm) resulting from the ⁶A₁→⁴A₁(⁴G), ⁴E(⁴G) transitions of Mn²⁺ ions. An effective dipole-dipole energy transfer has been confirmed to occur between the co-doped Eu²⁺ and Mn²⁺ ions. The luminescent color of the as-prepared phosphors can change from blue to yellow, and finally to orange red by adjusting the doping amount of the co-doped ions. The optimal sample's EQE reached 20.59% due to the high absorption efficiency. Finally, a 400 nm violet light chip excited white LED with a high color rendering index (CRI) of Ra = 98 was fabricated by using the as-prepared Na₂Ca(PO₄)F:0.02Eu²⁺,0.04Mn²⁺ phosphor in combination with the commercial blue Sr₅(PO₄)₃Cl:Eu²⁺ phosphor and red CaAlSiN₃:Eu²⁺ phosphor. The results indicated that the developed phosphor holds notable potential for application in in the field of sunlike healthy lighting.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121103"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138928","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":"Key components for active-matrix OLED displays: Fundamentals and market status","authors":"Yunfeng Long ,&nbsp;Hong Meng","doi":"10.1016/j.jlumin.2025.121099","DOIUrl":"10.1016/j.jlumin.2025.121099","url":null,"abstract":"<div><div>Since Samsung introduced its first-generation Super active-matrix organic light-emitting display (AMOLED) displays on Galaxy S smartphones in 2010, AMOLED technology has garnered significant attention, driving the establishment of numerous production lines. LG launched AMOLED TVs using white OLED (WOLED) technology in 2013, followed by Samsung's mass production of quantum dot (QD)-OLED panels in 2021. In 2024, Huawei unveiled the world's first three-fold AMOLED smartphone. These advancements required decades of research to evolve from experimental prototypes to cutting-edge products. Over the past 30 years, OLED components have been extensively reviewed. However, other critical elements for constructing displays remain less explored. This article provides an in-depth analysis of the key materials essential for AMOLED development, with a particular focus on the four key components: substrates, thin-film transistors, OLEDs, and optical films.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121099"},"PeriodicalIF":3.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138958","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":"Adjustment of the energy transfer pathway in nanoplatelet-organic molecule hybrids through spectral overlap","authors":"Chaofan Fang,&nbsp;Zhongpo Zhou,&nbsp;Minghuan Cui,&nbsp;Shuwen Zheng,&nbsp;Pan Song,&nbsp;Jian Song,&nbsp;Zhaoyong Jiao,&nbsp;Shuhong Ma,&nbsp;Guangrui Jia,&nbsp;Yuhai Jiang,&nbsp;Chaochao Qin","doi":"10.1016/j.jlumin.2025.121102","DOIUrl":"10.1016/j.jlumin.2025.121102","url":null,"abstract":"<div><div>Two-dimensional (2D) CsPbBr₃ nanoplatelets (NPLs) have garnered significant attention because of their promising applications in optoelectronics and photocatalysis. Despite substantial progress in the development of these materials, a critical gap remains. This gap is particularly evident in the understanding of singlet and triplet energy transfer mechanisms within hybrid systems that incorporate organic molecules, such as Rose Bengal (RoseB). Using a combination of steady-state and transient absorption spectroscopy, we demonstrate that both singlet and triplet energy transfer are feasible within this hybrid system. Our findings reveal that the efficiency of these processes highly depends on the CsPbBr₃ NPLs and RoseB spectral overlap, which is in turn influenced by the NPLs thickness. The energy transfer rate of the system increases with increasing spectral overlap, as does the energy transfer efficiency. As the NPLs thickness increases, a higher proportion of singlet energy transfer and a corresponding decrease in triplet energy transfer occur. Our results offer new strategies for controlling energy transfer pathways, which can enhance the design and optimization of high-performance optical devices and improve the efficiency of photocatalytic systems.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121102"},"PeriodicalIF":3.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138957","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 room temperature afterglow in nitrogen doped carbon dots triggered by steric hindrance effect","authors":"Jing Yang,&nbsp;Yafang Wang,&nbsp;Xiaona Lu","doi":"10.1016/j.jlumin.2025.121100","DOIUrl":"10.1016/j.jlumin.2025.121100","url":null,"abstract":"<div><div>Carbon dots (CDs) have attracted considerable attention in the construction of metal free afterglow materials. Most of the precursor materials used for the preparation of CDs are hazardous chemicals and the afterglow decay time is very short. The current improvements were made by modifying the reaction time and embedding dopants. Two series of boronic acid-based carbon dots (CDs/BA) and N-doped boronic acid-based carbon dots (NCDs/BA) have been successfully prepared. The luminescence results indicate that the boronic acid caused boron carbon (B-C) bond can reduce the energy gap (Δ E_ST) between the lowest singlet state (S₁) and triplet state (T₁), which leads to the promotion of intersystem crossing (ISC) between S₁ and T₁ and the increase of the number of triplet excitons. Additionally, morphological characterization as well as the luminescence performance of NCDs/BA indicate that the steric hindrance effect has another effect on the activating of room temperature phosphorescent (RTP) of boronic acid-based CDs, which could increase the skeleton stiffness of CDs and effectively protect the excited triplet state of CDs from non-radiative deactivation.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121100"},"PeriodicalIF":3.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138929","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":"Novel EGCG assisted combustion synthesis of Ce3+, Tb3+ co-doped Y4Al2O9 nanophosphors: Photometric characteristics, W-LED, anticounterfeiting and latent fingerprinting applications","authors":"K.S. Chenthil ,&nbsp;Siva Ranganatham ,&nbsp;B.R. Radha Krushna ,&nbsp;M. Gagana ,&nbsp;S.C. Sharma ,&nbsp;Deepak Parhi ,&nbsp;R. Sivayogana ,&nbsp;R. Anitha ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;R. Arunakumar ,&nbsp;H. Nagabhushana","doi":"10.1016/j.jlumin.2025.121093","DOIUrl":"10.1016/j.jlumin.2025.121093","url":null,"abstract":"<div><div>This study reports the synthesis and characterization of novel green-emitting Y₄Al₂O₉:0.03Ce³⁺/0.02Tb³⁺ (YAM:0.03Ce³⁺/0.02Tb³⁺) nanophosphors (NPs) for advanced solid-state lighting and multifunctional applications. The NPs, synthesized using a combustion method, exhibited a monoclinic structure confirmed by Rietveld refinement using data. Upon near-ultraviolet (n-UV) excitation (365 nm), the YAM:0.03Ce³⁺/0.02 Tb³⁺ NPs produced bright green emission at 543 nm, facilitated by an efficient Ce³⁺→Tb³⁺ energy transfer (ET) process with a remarkable efficiency of 92.28 %. The ET mechanism is identified as dipole-dipole (<em>d-d</em>) interaction, highlighting the cooperative luminescent behavior between Ce³⁺ and Tb³⁺ ions. The NPs demonstrated excellent thermal stability, retaining 98.26 % of their luminescence at 423 K with an activation energy (<em>E</em>_<em>a</em>) of 0.38 eV, and a high internal quantum efficiency (\"IQE\") of 90.8 %. A prototype white light emitting diodes (w-LEDs), fabricated using the YAM:0.03Ce³⁺/0.02 Tb³⁺ NPs combined with a 395 nm n-UV LED chip and CaAlSiN₃:Eu²⁺ red NPs, exhibited superior performance. The device emitted high-brightness cool-white light with CIE coordinates (0.325, 0.319) and, a colour rendering index (<em>R</em>_<em>a</em>) of 94, a correlated colour temperature (CCT) of 5880 K, and a luminous efficacy (LE) of 35.02 lm/W. Beyond lighting applications, the NPs demonstrated high resolution and sensitivity in latent fingerprints (LFPs) detection, excellent fluorescence for anticounterfeiting applications, and strong potential for optical thermometry. The outstanding luminescent properties, thermal stability, and multifunctionality of YAM:0.03Ce³⁺/0.02 Tb³⁺ NPs underscore their potential as efficient colour converters for n-UV w-LEDs and versatile materials for security and forensic technologies, paving the way for advancements in solid-state lighting and beyond.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121093"},"PeriodicalIF":3.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139050","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":"Application of high thermal stability inorganic scintillator material Ba1.31Ca0.69SiO4:Eu2+,Dy3+ in X-ray imaging","authors":"Kuo Shen ,&nbsp;Yahong Jin ,&nbsp;Yanmei Li ,&nbsp;Yihua Hu","doi":"10.1016/j.jlumin.2025.121097","DOIUrl":"10.1016/j.jlumin.2025.121097","url":null,"abstract":"<div><div>Inorganic scintillator materials have garnered widespread attention due to their applications in high-energy X-ray detection and imaging. However, developing materials that possess both high thermal stability and the capability to provide high-resolution X-ray imaging remains a significant challenge in this field. This article reports the synthesis of Ba_1.31Ca_0.69SiO₄ inorganic scintillator materials doped with Eu²⁺ and Dy³⁺ through a high-temperature solid-phase method. Their structure, photoluminescent properties under visible light and X-ray excitation, and thermoluminescence characteristics were thoroughly characterized. Experimental results indicate that the material's traps were enriched through the aliovalent substitution of Dy³⁺, enhancing the afterglow at room temperature. Under 350 nm excitation, the material demonstrated excellent thermal stability (maintaining 90% of its intensity at 150 °C compared to 30 °C) and a high quantum efficiency (IQE = 96.64 %). Furthermore, under X-ray excitation, the material exhibits a high electron storage capacity, which can be read out under near-infrared light at 870 nm, and can be rapidly erased under heating conditions or under visible light at 470 nm. Finally, we prepared flexible films using the phosphor, demonstrating a spatial resolution of 11.9 lp/mm⁻¹ under X-rays, as well as showcasing the real-time and delayed imaging capabilities of the flexible film under X-ray exposure.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121097"},"PeriodicalIF":3.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139074","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":"SMD chip resistors as reliable thermoluminescent dosimeters: Dosimetric characterization and TL kinetics study","authors":"Madhusmita Panda ,&nbsp;Sreekar Chivukula ,&nbsp;Shailesh Joshi ,&nbsp;M.G. Komathi ,&nbsp;O. Annalakshmi ,&nbsp;Venkata Srinivas C","doi":"10.1016/j.jlumin.2025.121094","DOIUrl":"10.1016/j.jlumin.2025.121094","url":null,"abstract":"<div><div>The ubiquity of surface mount devices (SMDs), such as resistors, capacitors, and inductors, in portable electronic devices and their sensitivity to ionizing radiation have made them an attractive area of study in luminescence dosimetry. While the optically stimulated luminescence of these components has been extensively studied, the thermoluminescence (TL) properties of SMDs remain relatively understudied. This investigation includes glow curve deconvolution of SMD chip resistors to analyze their kinetics and dosimetric suitability. We found that aluminosilicates are the primary material responsible for the TL signal, and the application of a suitable optical filter significantly enhances detection sensitivity. The glow curves exhibited two distinct peaks at ∼92 °C and 365 °C, and an overlapping peak near 205 °C. The 205 °C peak, unaffected by sensitization effects, was selected for detailed analysis. The resistors demonstrated a linear dose response over a range of 86 mGy to 10 Gy, with a minimum detectable dose of 12.57 mGy. We also found that preheating the resistors reduces signal fading by about 22 %. Our analysis of TL kinetic parameters using the glow curve deconvolution revealed the coexistence of discrete and continuous energy traps, which is consistent with results from T_m-T_stop analysis. The single aliquot regenerative-dose technique was used to accurately recover the dose, demonstrating that SMD chip resistors can serve as reliable TL dosimeters for measuring past radiation exposure.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121094"},"PeriodicalIF":3.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139049","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":"Highly sensitive solar-blind avalanche photodetector based on one-dimensional Ga2O3 nanoarrays heterojunction","authors":"Chaoyang Huang ,&nbsp;Xiaoxuan Wang ,&nbsp;Lingfeng Mao ,&nbsp;Yi Ma ,&nbsp;Feifei Qin ,&nbsp;Jianqi Dong ,&nbsp;Zengliang Shi ,&nbsp;Gangyi Zhu ,&nbsp;Qiannan Cui ,&nbsp;Chunxiang Xu","doi":"10.1016/j.jlumin.2025.121095","DOIUrl":"10.1016/j.jlumin.2025.121095","url":null,"abstract":"<div><div>To achieve excellent ultra-weak light detection in solar blind ultraviolet range, avalanche photodetector (APD) with carrier multiplication is an efficient means, especially in one-dimensional nanoarray for its high light filed confinement ability and specific carrier transport path spatially. Herein, a simple, convenient and mass-produced hydrothermal method is used to fabricated Ga₂O₃ nanoarrays, and the SnO₂ film meets the seed layer and type-I heterojunction construction requirement with large conduction band offset. Interestingly, the avalanche effect with a low avalanche voltage is demonstrated in this device through temperature-changed experiments, hence the APD is obtained successfully and exhilaratingly. The device exhibits an ultra-high gain of ∼10⁵ and superb sensitivity to weak signal (126 nW/cm²) of deep ultraviolet light. The results provide a simple, effective and industrially producible way to construct highly sensitive photodetectors and three-dimensional integrated optoelectronic devices with high performance.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121095"},"PeriodicalIF":3.3,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138959","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":"Broadening near-infrared emission and enhancing thermal stability of Cr3+-activated SrLaGa3O7 phosphors via Yb3+ co-doping","authors":"Yichen Yang ,&nbsp;Wei Lü ,&nbsp;Xiaojiao Kang ,&nbsp;Zhennan Zhu ,&nbsp;Qiwen Pan ,&nbsp;Qun Zeng","doi":"10.1016/j.jlumin.2025.121098","DOIUrl":"10.1016/j.jlumin.2025.121098","url":null,"abstract":"<div><div>Cr³⁺-activated near-infrared (NIR) phosphors are receiving remarkable attention for their use in spectroscopic technologies. We present an NIR emitting phosphor SrLaGa₃O₇:Cr³⁺ with the internal quantum efficiency (IQE) of 46.8 %. This phosphor exhibits an emission centered at 760 nm under 440 nm blue light excitation, which is caused by Cr³⁺ ion occupancy at two Ga³⁺ sites. The intensity of the emission at 150 °C maintains 68 % of that at 25 °C. Furthermore, the Yb³⁺ co-doping technique is utilized to generate a substantial broadening of the near-infrared emission and an immense improvement in thermal stability (85 %@150 °C). Both lifetime analysis and luminescence spectra verified the energy transfer (ET) from Cr³⁺ to Yb³⁺. The brightest phosphors, SrLaGa₃O₇: Cr³⁺ and SrLaGa₃O₇: Cr³⁺, Yb³⁺, are combined with a 450 nm blue LED chip to fabricate the NIR pc-LED device, which show that phosphors have considerable potential for use in NIR spectroscopy and night vision.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121098"},"PeriodicalIF":3.3,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138949","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}