Pub Date : 2025-12-03DOI: 10.1016/j.jlumin.2025.121691
Qinghong Meng , Jiaming Yuan , Wanjun Yu , Xiangming Li , Yaping Wang , Zhijun Xu , Ji-Guang Li
To meet the diverse requirements of the near-infrared (NIR) phosphor-converted light-emitting-diodes (NIR pc-LEDs) in various fields, high-performance broadband NIR-emitting phosphors are attracting growing interest. A novel garnet-type Gd2CaAl3‒yGaZrO12:yCr3+ (GCAGZ:yCr) NIR phosphor with satisfactory luminescence efficiency and thermal stability was discovered in this work. The typical GCAGZ:0.04Cr phosphor exhibited highly efficient (IQE = 93.3 %, EQE = 20.0 %) broadband NIR emission with peaking at ∼748 nm (full-width at half-maximum ∼102 nm) and excellent thermal stability (88.3 %@423 K) under 450 nm light excitation, owing to the wide band gap of the garnet host, the relatively weak crystal field environment, and the exceedingly weak electron-phonon coupling effect. The NIR pc-LED device constructed by coating this GCAGZ:0.04Cr phosphor on a 450 nm blue LED chip presented outstanding NIR output power (∼44.8 mW) and photoelectric conversion efficiency (19.8 %) under a driving current of 100 mA, showing that this phosphor has huge potential utilized in the construction of NIR pc-LED applied in plant growth lighting, night vision, and non-invasive medical diagnosis.
{"title":"Efficient and thermal stable broadband near-infrared emitting Gd2CaAl3GaZrO12:Cr3+ garnet phosphor: structure, luminescence, and pc-LED application","authors":"Qinghong Meng , Jiaming Yuan , Wanjun Yu , Xiangming Li , Yaping Wang , Zhijun Xu , Ji-Guang Li","doi":"10.1016/j.jlumin.2025.121691","DOIUrl":"10.1016/j.jlumin.2025.121691","url":null,"abstract":"<div><div>To meet the diverse requirements of the near-infrared (NIR) phosphor-converted light-emitting-diodes (NIR pc-LEDs) in various fields, high-performance broadband NIR-emitting phosphors are attracting growing interest. A novel garnet-type Gd<sub>2</sub>CaAl<sub>3‒<em>y</em></sub>GaZrO<sub>12</sub>:<em>y</em>Cr<sup>3+</sup> (GCAGZ:<em>y</em>Cr) NIR phosphor with satisfactory luminescence efficiency and thermal stability was discovered in this work. The typical GCAGZ:0.04Cr phosphor exhibited highly efficient (IQE = 93.3 %, EQE = 20.0 %) broadband NIR emission with peaking at ∼748 nm (full-width at half-maximum ∼102 nm) and excellent thermal stability (88.3 %@423 K) under 450 nm light excitation, owing to the wide band gap of the garnet host, the relatively weak crystal field environment, and the exceedingly weak electron-phonon coupling effect. The NIR pc-LED device constructed by coating this GCAGZ:0.04Cr phosphor on a 450 nm blue LED chip presented outstanding NIR output power (∼44.8 mW) and photoelectric conversion efficiency (19.8 %) under a driving current of 100 mA, showing that this phosphor has huge potential utilized in the construction of NIR pc-LED applied in plant growth lighting, night vision, and non-invasive medical diagnosis.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121691"},"PeriodicalIF":3.6,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692189","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jlumin.2025.121689
Xuejie Yuan , Guobin Cong , Meijing Deng , Sa Zhang , Shuwen Zheng , Pengfei Liu , Yueyu Peng , Zihan Zhao , Han Zhang , Ying Niu , Qianyan Duan , Bin Zhai , Fuli Zhang
Three novel cationic iridium(III) complexes, [Ir(btp)2(pymi)]PF6 (Ir1), [Ir(tfbtp)2(pymi)]PF6 (Ir2), and [Ir(btq)2(pymi)]PF6 (Ir3), featuring benzothiophene-based cyclometalating ligands and a pyridyl-carbene ancillary ligand, were designed and synthesized. By systematically varying the π-conjugation length and electron-withdrawing substituents on the cyclometalating ligands, we achieved precise tuning of the luminescence properties. In acetonitrile solution, Ir1–Ir3 exhibit intense phosphorescence spanning from yellow to deep-red, with emission maxima at 580, 608, and 639 nm, respectively. Combined photophysical studies and quantum chemical calculations reveal that the emissions predominantly originate from ligand-centered triplet states (3LC π–π*) on the cyclometalating ligands. Furthermore, these complexes serve as excellent luminescent probes for live cell imaging, demonstrating efficient cellular uptake and distinct subcellular localization patterns—from cytoplasmic distribution (Ir1) to lysosomal (Ir2) and membrane-associated (Ir3) targeting. This work underscores the significant potential of pyridyl-carbene based Ir(III) complexes as tunable luminophores for both fundamental photophysical studies and advanced bioimaging applications.
{"title":"Cationic iridium complexes with a pyridyl-carbene ancillary ligand: strategic color tuning and application in live cell imaging","authors":"Xuejie Yuan , Guobin Cong , Meijing Deng , Sa Zhang , Shuwen Zheng , Pengfei Liu , Yueyu Peng , Zihan Zhao , Han Zhang , Ying Niu , Qianyan Duan , Bin Zhai , Fuli Zhang","doi":"10.1016/j.jlumin.2025.121689","DOIUrl":"10.1016/j.jlumin.2025.121689","url":null,"abstract":"<div><div>Three novel cationic iridium(III) complexes, [Ir(btp)<sub>2</sub>(pymi)]PF<sub>6</sub> (<strong>Ir1</strong>), [Ir(tfbtp)<sub>2</sub>(pymi)]PF<sub>6</sub> (<strong>Ir2</strong>), and [Ir(btq)<sub>2</sub>(pymi)]PF<sub>6</sub> (<strong>Ir3</strong>), featuring benzothiophene-based cyclometalating ligands and a pyridyl-carbene ancillary ligand, were designed and synthesized. By systematically varying the π-conjugation length and electron-withdrawing substituents on the cyclometalating ligands, we achieved precise tuning of the luminescence properties. In acetonitrile solution, <strong>Ir1–Ir3</strong> exhibit intense phosphorescence spanning from yellow to deep-red, with emission maxima at 580, 608, and 639 nm, respectively. Combined photophysical studies and quantum chemical calculations reveal that the emissions predominantly originate from ligand-centered triplet states (<sup>3</sup>LC π–π*) on the cyclometalating ligands. Furthermore, these complexes serve as excellent luminescent probes for live cell imaging, demonstrating efficient cellular uptake and distinct subcellular localization patterns—from cytoplasmic distribution (<strong>Ir1</strong>) to lysosomal (<strong>Ir2</strong>) and membrane-associated (<strong>Ir3</strong>) targeting. This work underscores the significant potential of pyridyl-carbene based Ir(III) complexes as tunable luminophores for both fundamental photophysical studies and advanced bioimaging applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121689"},"PeriodicalIF":3.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692190","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jlumin.2025.121690
José A. Jiménez , Luiz G. Jacobsohn
Melt-quenched phosphate glasses prepared with fixed Tb3+ content alongside SnO added up to 5.0 mol% were characterized by density and optical absorption measurements, and radioluminescence (RL) evaluated under continuous X-ray excitation including at high temperatures. The densities exhibited some variations which were suggested to be influenced by the Sn4+ concentration leading to more compact phases. The optical absorption spectra were consistent with Tb3+ occurring similarly in the glasses. Comparison of the RL spectra at room temperature showed the most intense emission was obtained for the Tb-doped glass prepared with the highest SnO content supporting a key role from Sn2+ → Tb3+ energy transfer. An enhancement of the peak intensity of 2.5 × was observed, endorsing codoping with Sn2+ as an effective strategy to enhance the scintillator behavior of Tb3+-containing glasses. The temperature dependence of the scintillation spectra showed minimal variations for the tin-free Tb-doped reference, whereas the tin-containing glasses exhibited distinct intensity enhancements with temperature followed by quenching which depended on the SnO content.
{"title":"Scintillation properties of Tb3+ and Sn2+ co-doped phosphate glasses","authors":"José A. Jiménez , Luiz G. Jacobsohn","doi":"10.1016/j.jlumin.2025.121690","DOIUrl":"10.1016/j.jlumin.2025.121690","url":null,"abstract":"<div><div>Melt-quenched phosphate glasses prepared with fixed Tb<sup>3+</sup> content alongside SnO added up to 5.0 mol% were characterized by density and optical absorption measurements, and radioluminescence (RL) evaluated under continuous X-ray excitation including at high temperatures. The densities exhibited some variations which were suggested to be influenced by the Sn<sup>4+</sup> concentration leading to more compact phases. The optical absorption spectra were consistent with Tb<sup>3+</sup> occurring similarly in the glasses. Comparison of the RL spectra at room temperature showed the most intense emission was obtained for the Tb-doped glass prepared with the highest SnO content supporting a key role from Sn<sup>2+</sup> → Tb<sup>3+</sup> energy transfer. An enhancement of the peak intensity of 2.5 × was observed, endorsing codoping with Sn<sup>2+</sup> as an effective strategy to enhance the scintillator behavior of Tb<sup>3+</sup>-containing glasses. The temperature dependence of the scintillation spectra showed minimal variations for the tin-free Tb-doped reference, whereas the tin-containing glasses exhibited distinct intensity enhancements with temperature followed by quenching which depended on the SnO content.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121690"},"PeriodicalIF":3.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692179","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}
Pub Date : 2025-11-30DOI: 10.1016/j.jlumin.2025.121687
Zehua Zhang, Lili Wang, Ruiliang Zuo, Zhenzhen Jiang, Guangyong Jin
Wide band emission has aroused widespread focus in various fields such as display, plant lighting, and solar cells due to its spectral continuity. Here, a series of Sb3+/Mn2+ doped Cs2NaLuCl6 double perovskites with wide blue and red emissions were synthesized through a precipitation method. Enhanced self-trapped exciton (STE) emission and red emission of Mn2+ ion are achieved by doping Sb3+ ion to construct energy transfer channels. The temperature dependent fluorescence spectra exhibit that the emission intensity at 418 K remains 66.4% of that at 298 K in Cs2NaLuCl6: 1% Sb3+, 10% Mn2+ microcrystal. Importantly, the full-width at half-maximum (FWHM) of STE and Mn2+ ion emissions show obvious broadening as the temperature increases, which is attributed to the enhanced electron-phonon interaction. The optical temperature sensing method based on FWHM of STE and Mn2+ emissions is designed, the corresponding maximum relative sensitivity (Sr) values are 0.14% at 298 K and 0.61% at 448 K, respectively. Furthermore, due to the fluorescence intensity ratio (FIR) between STE and Mn2+ ion is highly temperature-dependent, the temperature sensing based on FIR technique is investigated. The maximum Sr values reach 1.31% K−1 at 448 K under 317 nm excitation. The minimum temperature resolution (δT) is calculated as 0.26 K at 448 K. The dual-mode temperature measurement methods based on FWHM and FIR can achieve more accurate remote temperature measurement. These results indicate the microcrystal has potential application in the fields of optical temperature thermometry.
{"title":"Design of dual-mode optical thermometry using Sb3+/Mn2+ codoped Cs2NaLuCl6 double perovskite","authors":"Zehua Zhang, Lili Wang, Ruiliang Zuo, Zhenzhen Jiang, Guangyong Jin","doi":"10.1016/j.jlumin.2025.121687","DOIUrl":"10.1016/j.jlumin.2025.121687","url":null,"abstract":"<div><div>Wide band emission has aroused widespread focus in various fields such as display, plant lighting, and solar cells due to its spectral continuity. Here, a series of Sb<sup>3+</sup>/Mn<sup>2+</sup> doped Cs<sub>2</sub>NaLuCl<sub>6</sub> double perovskites with wide blue and red emissions were synthesized through a precipitation method. Enhanced self-trapped exciton (STE) emission and red emission of Mn<sup>2+</sup> ion are achieved by doping Sb<sup>3+</sup> ion to construct energy transfer channels. The temperature dependent fluorescence spectra exhibit that the emission intensity at 418 K remains 66.4% of that at 298 K in Cs<sub>2</sub>NaLuCl<sub>6</sub>: 1% Sb<sup>3+</sup>, 10% Mn<sup>2+</sup> microcrystal. Importantly, the full-width at half-maximum (FWHM) of STE and Mn<sup>2+</sup> ion emissions show obvious broadening as the temperature increases, which is attributed to the enhanced electron-phonon interaction. The optical temperature sensing method based on FWHM of STE and Mn<sup>2+</sup> emissions is designed, the corresponding maximum relative sensitivity (<em>S</em><sub>r</sub>) values are 0.14% at 298 K and 0.61% at 448 K, respectively. Furthermore, due to the fluorescence intensity ratio (FIR) between STE and Mn<sup>2+</sup> ion is highly temperature-dependent, the temperature sensing based on FIR technique is investigated. The maximum <em>S</em><sub>r</sub> values reach 1.31% K<sup>−1</sup> at 448 K under 317 nm excitation. The minimum temperature resolution (<em>δT</em>) is calculated as 0.26 K at 448 K. The dual-mode temperature measurement methods based on FWHM and FIR can achieve more accurate remote temperature measurement. These results indicate the microcrystal has potential application in the fields of optical temperature thermometry.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121687"},"PeriodicalIF":3.6,"publicationDate":"2025-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692178","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}
Pub Date : 2025-11-29DOI: 10.1016/j.jlumin.2025.121686
Yaomei Shen , Yujie Liu , Qi Zhu , Guoying Zhao , Zhixin Xu , Panpan Du , Ji-Guang Li , Yongzheng Fang
Layered rare earth hydroxides (LRHs) capable of anion exchange without altering the primary layer structure have garnered significant interest in various chemical domains. Specifically, by manipulating the type and concentration of anions, precise control can be exercised over the morphology, interlayer spacing, and photoluminescent behavior of LRHs. In this study, we successfully synthesized three distinct interlayer compounds. Anions containing various transition metal oxyanions exchanged with NO3− anions in the interlayer region, resulting in reduced or unaltered interlayer spacing. Photoluminescence spectra exhibited additional charge transfer bands (CTB). Under the CTB excitation, a symmetry transition of Eu3+ coordination from 9-fold (C4ᵥ) to 8-fold (C1) and anion exchange with MoO42− and WO42− reduced interlayer spacing (from 0.90 nm to 0.858 nm and 0.794 nm). The symmetry reduction led to the formation of Eu3+ activators with enhanced asymmetry, resulting in an 8.5-fold and 2.5-fold improvement in photoluminescence intensity. Furthermore, enhancement in fluorescence performance after the exchange of vanadate anions with LRH's NO3− can be attributed to the efficient transfer of absorbed energy by the vanadate anions to Eu3+ ions in LRHs, achieved through an antenna effect, ultimately increasing a 30.2-fold photoluminescent efficiency, despite maintaining the unaltered interlayer spacing and the original coordination symmetry. This study showcases the synthesis of high-quality layered compound materials using a hydrothermal approach, opening up new prospects for inserting a broader range of anion species into layered rare earth hydroxides and fabricating high-quality nanosheets.
{"title":"Drastic enhancement of photoluminescence properties from anion-pillared layered Y/Eu hydroxides with oxometallate species","authors":"Yaomei Shen , Yujie Liu , Qi Zhu , Guoying Zhao , Zhixin Xu , Panpan Du , Ji-Guang Li , Yongzheng Fang","doi":"10.1016/j.jlumin.2025.121686","DOIUrl":"10.1016/j.jlumin.2025.121686","url":null,"abstract":"<div><div>Layered rare earth hydroxides (LRHs) capable of anion exchange without altering the primary layer structure have garnered significant interest in various chemical domains. Specifically, by manipulating the type and concentration of anions, precise control can be exercised over the morphology, interlayer spacing, and photoluminescent behavior of LRHs. In this study, we successfully synthesized three distinct interlayer compounds. Anions containing various transition metal oxyanions exchanged with NO<sub>3</sub><sup>−</sup> anions in the interlayer region, resulting in reduced or unaltered interlayer spacing. Photoluminescence spectra exhibited additional charge transfer bands (CTB). Under the CTB excitation, a symmetry transition of Eu<sup>3+</sup> coordination from 9-fold (C<sub>4</sub>ᵥ) to 8-fold (C<sub>1</sub>) and anion exchange with MoO<sub>4</sub><sup>2−</sup> and WO<sub>4</sub><sup>2−</sup> reduced interlayer spacing (from 0.90 nm to 0.858 nm and 0.794 nm). The symmetry reduction led to the formation of Eu<sup>3+</sup> activators with enhanced asymmetry, resulting in an 8.5-fold and 2.5-fold improvement in photoluminescence intensity. Furthermore, enhancement in fluorescence performance after the exchange of vanadate anions with LRH's NO<sub>3</sub><sup>−</sup> can be attributed to the efficient transfer of absorbed energy by the vanadate anions to Eu<sup>3+</sup> ions in LRHs, achieved through an antenna effect, ultimately increasing a 30.2-fold photoluminescent efficiency, despite maintaining the unaltered interlayer spacing and the original coordination symmetry. This study showcases the synthesis of high-quality layered compound materials using a hydrothermal approach, opening up new prospects for inserting a broader range of anion species into layered rare earth hydroxides and fabricating high-quality nanosheets.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121686"},"PeriodicalIF":3.6,"publicationDate":"2025-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692187","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}
Pub Date : 2025-11-28DOI: 10.1016/j.jlumin.2025.121678
Zixuan Qian , Xuteng Wu , Lunbin Xia , Jin Wang , Jialong Zhao , Xi Yuan , Xin Bao
Silicon nanodots (SiNDs)-based room-temperature phosphorescence (RTP) materials have garnered significant attention due to their facile synthesis, cost-effectiveness, and low toxicity. However, the development of SiNDs with multi-color long-lived RTP remains a significant challenge, primarily due to the difficulty in regulating the bandgap. In this work, long-lived multicolor RTP was achieved in SiNDs through Zn2+ doping, which effectively reduces the bandgap. The doping of Zn2+ in SiNDs overcomes the limitations imposed by the energy gap law, enabling precise control of the RTP emission color and allowing excitation under UV/blue light. The phosphorescence emission spans from green to orange, and the afterglow signals are clearly visible to the naked eye for 8–14 s. Additionally, the introduction of Zn2+ ions reduces the singlet-triplet energy gap (ΔEST), facilitating efficient intersystem crossing (ISC) and significantly enhancing phosphorescence performance. The as-prepared SiNDs were further applied in pattern-based anti-counterfeiting and integrated with Morse code for multiple-level information encryption, highlighting their promising potential in security and data encryption technologies.
{"title":"Achieving long-lived multicolor room-temperature phosphorescence in silicon nanodots through Zn2+ doping for anti-counterfeiting and multiple-level information encryption","authors":"Zixuan Qian , Xuteng Wu , Lunbin Xia , Jin Wang , Jialong Zhao , Xi Yuan , Xin Bao","doi":"10.1016/j.jlumin.2025.121678","DOIUrl":"10.1016/j.jlumin.2025.121678","url":null,"abstract":"<div><div>Silicon nanodots (SiNDs)-based room-temperature phosphorescence (RTP) materials have garnered significant attention due to their facile synthesis, cost-effectiveness, and low toxicity. However, the development of SiNDs with multi-color long-lived RTP remains a significant challenge, primarily due to the difficulty in regulating the bandgap. In this work, long-lived multicolor RTP was achieved in SiNDs through Zn<sup>2+</sup> doping, which effectively reduces the bandgap. The doping of Zn<sup>2+</sup> in SiNDs overcomes the limitations imposed by the energy gap law, enabling precise control of the RTP emission color and allowing excitation under UV/blue light. The phosphorescence emission spans from green to orange, and the afterglow signals are clearly visible to the naked eye for 8–14 s. Additionally, the introduction of Zn<sup>2+</sup> ions reduces the singlet-triplet energy gap (ΔE<sub>ST</sub>), facilitating efficient intersystem crossing (ISC) and significantly enhancing phosphorescence performance. The as-prepared SiNDs were further applied in pattern-based anti-counterfeiting and integrated with Morse code for multiple-level information encryption, highlighting their promising potential in security and data encryption technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121678"},"PeriodicalIF":3.6,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145622803","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}
Pub Date : 2025-11-28DOI: 10.1016/j.jlumin.2025.121685
Xiaodong Zhang , Xiaoman Zhang , Kun Nie , Yuqing Qu , Luoxin Wang , Lefu Mei , Hua Wang , Xiaoxue Ma
Luminescence enhancement has always been a key research topic for luminescent materials. Rare earth (RE) -doped hydroxyapatite (HAP) luminescent materials have been widely applied in the fields of biological probes and target cell markers due to their excellent biocompatibility. However, hydroxyl groups (-OH) in hydroxyapatite luminescent materials significantly weaken their luminous ability. Here, we introduce an Eu3+-doped hydroxyapatite luminescent material that regulates luminescence by introducing Eu3+ during the experiment. The Eu3+-doped hydroxyapatite did not significantly alter the crystal structure of hydroxyapatite, but the hydroxyapatite nanorods became smaller. Eu3+-doped hydroxyapatite has an excellent red glow under ultraviolet (UV) light. In addition, hydroxyapatite and aramid chopped fibers (ACFs)/polyphenylene sulfide (PPS) composite fibers were composite to obtain luminescent and stable luminescent fibers. This flexible luminescent fiber paper can maintain stable luminescence in environments such as high and low temperatures. The color temperature (CCT) of the white light emitting diode (LED) prepared based on Eu3+-doped HAP is 6761 K, and the color rendering index (CRI) is 92. This study successfully explores the application of hydroxyapatite in the fields of emergency rescue, anti-counterfeiting, and lighting.
{"title":"Multi-talented luminescent hydroxyapatite nanocrystals toward high-performance fiber fabric and optoelectronic devices","authors":"Xiaodong Zhang , Xiaoman Zhang , Kun Nie , Yuqing Qu , Luoxin Wang , Lefu Mei , Hua Wang , Xiaoxue Ma","doi":"10.1016/j.jlumin.2025.121685","DOIUrl":"10.1016/j.jlumin.2025.121685","url":null,"abstract":"<div><div>Luminescence enhancement has always been a key research topic for luminescent materials. Rare earth (RE) -doped hydroxyapatite (HAP) luminescent materials have been widely applied in the fields of biological probes and target cell markers due to their excellent biocompatibility. However, hydroxyl groups (-OH) in hydroxyapatite luminescent materials significantly weaken their luminous ability. Here, we introduce an Eu<sup>3+</sup>-doped hydroxyapatite luminescent material that regulates luminescence by introducing Eu<sup>3+</sup> during the experiment. The Eu<sup>3+</sup>-doped hydroxyapatite did not significantly alter the crystal structure of hydroxyapatite, but the hydroxyapatite nanorods became smaller. Eu<sup>3+</sup>-doped hydroxyapatite has an excellent red glow under ultraviolet (UV) light. In addition, hydroxyapatite and aramid chopped fibers (ACFs)/polyphenylene sulfide (PPS) composite fibers were composite to obtain luminescent and stable luminescent fibers. This flexible luminescent fiber paper can maintain stable luminescence in environments such as high and low temperatures. The color temperature (CCT) of the white light emitting diode (LED) prepared based on Eu<sup>3+</sup>-doped HAP is 6761 K, and the color rendering index (CRI) is 92. This study successfully explores the application of hydroxyapatite in the fields of emergency rescue, anti-counterfeiting, and lighting.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121685"},"PeriodicalIF":3.6,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145622802","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}
Pub Date : 2025-11-26DOI: 10.1016/j.jlumin.2025.121677
Mengke Bai , Wenya Lai , Fei Zhou , Hangqing Xie , Jing Xu , Jiadi Lian , Shiqing Xu
Triplet excitons serve as a critical pathway for harvesting energy released during X-ray interactions with heavy elements; however, strategies to enhance their activation efficiency remain limited. Herein, we report a novel organic doping approach to optimize the triplet radioluminescence (RL) of Tb3+/Ga3+ metallacrown (Tb-1) scintillators. By introducing 1,2,4,5-benzenetetracarboxylic acid (PMA) as a ligand dopant, a new scintillation crystal, Tb-1-PMA, is synthesized. Compared to the Tb-1 crystal, Tb-1-PMA exhibits a significant reduction in metal content while maintaining structural integrity. When excited by ultraviolet light or X-rays, Tb-1-PMA crystal emit bright green light, and the photoluminescence quantum yield (PLQY) is increased from 36.8 % to 45.3 %. The RL intensity of Tb-1-PMA surpasses that of Tb-1 by 50 %, achieving a relative light yield of 17,000 photons MeV−1, accompanied by nearly eliminated afterglow. These enhancements stem from improved energy-level alignment between organic triplet excitons and Tb3+ in Tb-1-PMA, enabling efficient energy transfer. The RL intensity demonstrates a linear response to X-ray dose rates, with a detection limit of 0.044 μGy s−1, approximately 123-fold lower than conventional diagnostic doses. This work provides a cost-effective and scalable strategy for designing organic-doped high-performance triplet-emitting scintillators.
{"title":"Organic doping-based optimization of triplet radioluminescence of Tb3+/Ga3+ metallacrown scintillators for X-Ray detection","authors":"Mengke Bai , Wenya Lai , Fei Zhou , Hangqing Xie , Jing Xu , Jiadi Lian , Shiqing Xu","doi":"10.1016/j.jlumin.2025.121677","DOIUrl":"10.1016/j.jlumin.2025.121677","url":null,"abstract":"<div><div>Triplet excitons serve as a critical pathway for harvesting energy released during X-ray interactions with heavy elements; however, strategies to enhance their activation efficiency remain limited. Herein, we report a novel organic doping approach to optimize the triplet radioluminescence (RL) of Tb<sup>3+</sup>/Ga<sup>3+</sup> metallacrown (Tb-1) scintillators. By introducing 1,2,4,5-benzenetetracarboxylic acid (PMA) as a ligand dopant, a new scintillation crystal, Tb-1-PMA, is synthesized. Compared to the Tb-1 crystal, Tb-1-PMA exhibits a significant reduction in metal content while maintaining structural integrity. When excited by ultraviolet light or X-rays, Tb-1-PMA crystal emit bright green light, and the photoluminescence quantum yield (PLQY) is increased from 36.8 % to 45.3 %. The RL intensity of Tb-1-PMA surpasses that of Tb-1 by 50 %, achieving a relative light yield of 17,000 photons MeV<sup>−1</sup>, accompanied by nearly eliminated afterglow. These enhancements stem from improved energy-level alignment between organic triplet excitons and Tb<sup>3+</sup> in Tb-1-PMA, enabling efficient energy transfer. The RL intensity demonstrates a linear response to X-ray dose rates, with a detection limit of 0.044 μGy s<sup>−1</sup>, approximately 123-fold lower than conventional diagnostic doses. This work provides a cost-effective and scalable strategy for designing organic-doped high-performance triplet-emitting scintillators.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121677"},"PeriodicalIF":3.6,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145622804","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}
Pub Date : 2025-11-26DOI: 10.1016/j.jlumin.2025.121667
Juanfang Zhou , Zhihao Zhou , Meng Li , Yanhong Zhou , Xiaohan Ma , Dehao Xie , Xingliang Liu , Defang Xu
Two novel D-A type MFC molecules, BTPEBZBP and BTPECEBP, incorporating tetraphenylethylene units, were synthesized via a unified synthetic route. Both compounds exhibit pronounced ICT characteristics and significant AIE behavior, with AIE factors exceeding 135 and 58, respectively. Notably, they demonstrate exceptional MFC performance. The pristine powders of BTPEBZBP and BTPECEBP display intense blue and yellow-green luminescence, correspondingly. Mechanical grinding causes their luminescence colors to transform to green and orange-red, respectively. The fluorescence peaks exhibit redshifts, shifting from 461 nm to 533 nm–504 nm and 594 nm, accordingly. Additionally, the solid-state emission efficiencies of BTPEBZBP and BTPECEBP notably elevate from 0.135 to 0.174 to 0.175 and 0.385, respectively, upon mechanical stimulation. BTPEBZBP exhibits reversible MFC characteristics when exposed to DCM vapors, while ground BTPECEBP samples transition to Y-powders emitting yellow fluorescence with the wavelength of about 567 nm under DCM vapor fuming, demonstrating three-color fluorescence switching. The MFC properties of both compounds arise primarily from the transformation between crystalline and non-crystalline states. The detected bathochromic shift in PL spectra stems from a decreased bandgap, which results from extended π-conjugation, enhanced PICT effects, strengthened π-π stacking, and elevated exciton coupling coupled with stronger orbital overlap between adjacent molecules.
{"title":"Excellent aggregation-induced emission and mechanofluorochromic performances of donor–acceptor luminophores functionalized with tetraphenylethene","authors":"Juanfang Zhou , Zhihao Zhou , Meng Li , Yanhong Zhou , Xiaohan Ma , Dehao Xie , Xingliang Liu , Defang Xu","doi":"10.1016/j.jlumin.2025.121667","DOIUrl":"10.1016/j.jlumin.2025.121667","url":null,"abstract":"<div><div>Two novel D-A type MFC molecules, <strong>BTPEBZBP</strong> and <strong>BTPECEBP</strong>, incorporating tetraphenylethylene units, were synthesized via a unified synthetic route. Both compounds exhibit pronounced ICT characteristics and significant AIE behavior, with AIE factors exceeding 135 and 58, respectively. Notably, they demonstrate exceptional MFC performance. The pristine powders of <strong>BTPEBZBP</strong> and <strong>BTPECEBP</strong> display intense blue and yellow-green luminescence, correspondingly. Mechanical grinding causes their luminescence colors to transform to green and orange-red, respectively. The fluorescence peaks exhibit redshifts, shifting from 461 nm to 533 nm–504 nm and 594 nm, accordingly. Additionally, the solid-state emission efficiencies of <strong>BTPEBZBP</strong> and <strong>BTPECEBP</strong> notably elevate from 0.135 to 0.174 to 0.175 and 0.385, respectively, upon mechanical stimulation. <strong>BTPEBZBP</strong> exhibits reversible MFC characteristics when exposed to DCM vapors, while ground <strong>BTPECEBP</strong> samples transition to Y-powders emitting yellow fluorescence with the wavelength of about 567 nm under DCM vapor fuming, demonstrating three-color fluorescence switching. The MFC properties of both compounds arise primarily from the transformation between crystalline and non-crystalline states. The detected bathochromic shift in PL spectra stems from a decreased bandgap, which results from extended π-conjugation, enhanced PICT effects, strengthened π-π stacking, and elevated exciton coupling coupled with stronger orbital overlap between adjacent molecules.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121667"},"PeriodicalIF":3.6,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692176","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}
Pub Date : 2025-11-25DOI: 10.1016/j.jlumin.2025.121674
M. Korzhik , V. Smyslova , A. Bondarau , V. Dubov , E. Borisevich , K. Ivanovskikh , P. Karpuyk , I. Komendo , V. Pustovarov , D. Tavrunov , Y. Talochka
The radioluminescence and phosphorescence of Gd1.5Y1.5Al2Ga3O12 transparent scintillation ceramics doped with Pr3+, Ce3+, or their combination, as well as co-doped with Mg2+ were investigated for the first time. The results demonstrate that phosphorescence, which is a well-known phenomenon in Pr3+-doped aluminum-gallium garnets, can be effectively suppressed by introduction of Ce3+ ions and a small concentration of Mg2+ in the ceramics. The yield of radioluminescence of Ce3+ and Pr3+ co-doped ceramics was found to exceed a little that of ceramics doped solely with Ce3+, showing a low dependence on dopant concentration. The study also reveals that the Gd sublattice plays a crucial role in energy transfer between doping ions. Mg2+ co-doping acts similarly to the aluminum-gallium garnets solely doped with Ce; it suppresses phosphorescence in Pr3+-doped polycationic garnets resulting in sufficient diminishing of the afterglow level. Developed materials maintain high scintillation efficiency which makes them promising for applications in radiation detection.
{"title":"Mastering the suppression of the phosphorescence of Pr-doped aluminum-gallium Gd1.5Y1.5Al2Ga3O12 ceramic scintillators","authors":"M. Korzhik , V. Smyslova , A. Bondarau , V. Dubov , E. Borisevich , K. Ivanovskikh , P. Karpuyk , I. Komendo , V. Pustovarov , D. Tavrunov , Y. Talochka","doi":"10.1016/j.jlumin.2025.121674","DOIUrl":"10.1016/j.jlumin.2025.121674","url":null,"abstract":"<div><div>The radioluminescence and phosphorescence of Gd<sub>1.5</sub>Y<sub>1.5</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> transparent scintillation ceramics doped with Pr<sup>3+</sup>, Ce<sup>3+</sup>, or their combination, as well as co-doped with Mg<sup>2+</sup> were investigated for the first time. The results demonstrate that phosphorescence, which is a well-known phenomenon in Pr<sup>3+</sup>-doped aluminum-gallium garnets, can be effectively suppressed by introduction of Ce<sup>3+</sup> ions and a small concentration of Mg<sup>2+</sup> in the ceramics. The yield of radioluminescence of Ce<sup>3+</sup> and Pr<sup>3+</sup> co-doped ceramics was found to exceed a little that of ceramics doped solely with Ce<sup>3+</sup>, showing a low dependence on dopant concentration. The study also reveals that the Gd sublattice plays a crucial role in energy transfer between doping ions. Mg<sup>2+</sup> co-doping acts similarly to the aluminum-gallium garnets solely doped with Ce; it suppresses phosphorescence in Pr<sup>3+</sup>-doped polycationic garnets resulting in sufficient diminishing of the afterglow level. Developed materials maintain high scintillation efficiency which makes them promising for applications in radiation detection.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"290 ","pages":"Article 121674"},"PeriodicalIF":3.6,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145610620","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}
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