Optical Materials最新文献_第2页

Homo-dinuclear SamariumIII and EuropiumIII complexes with remarkable quantum yields: Orange-red and bright- red emitters 具有显著量子产率的同核SamariumIII和EuropiumIII配合物：橙红色和亮红色发射体

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-10-03 DOI: 10.1016/j.optmat.2025.117583

Asgar Ali , Zubair Ahmed , Khalid Iftikhar

{"title":"Homo-dinuclear SamariumIII and EuropiumIII complexes with remarkable quantum yields: Orange-red and bright- red emitters","authors":"Asgar Ali , Zubair Ahmed , Khalid Iftikhar","doi":"10.1016/j.optmat.2025.117583","DOIUrl":"10.1016/j.optmat.2025.117583","url":null,"abstract":"<div><div>This paper presents the synthesis and thorough characterizations of two highly luminescent heteroleptic homo-dinuclear samarium<sup>III</sup> and europium<sup>III</sup> complexes, [Ln(fod)<sub>3</sub>(μ-PBTPy)Ln(fod)<sub>3</sub>] (Ln = Eu(<strong>1</strong>) and Sm(<strong>2</strong>); fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod) and PBTPy = 4ʹ,4ʹʹʹʹ-(1,4-phenylene)bis(2,2ʹ:6ʹ,2ʹʹ-terpyridine}. Remarkably, the Sm<sup>III</sup> complex exhibits the highest solid-state photoluminescence quantum yield (PLQY = 13 %), ever reported for samarium complexes. The Eu<sup>III</sup> complex shows PLQY of 25 %. These results demonstrate that the PBTPy is an efficient synergic ligand for Sm<sup>III</sup> than Eu<sup>III</sup> ions. The intensity ratio between the Ln<sup>III</sup> chelates, [Ln(fod)<sub>3</sub>(H<sub>2</sub>O)] and PBTPy ligand in <sup>1</sup>H NMR spectra confirm the formation of dinuclear complexes. Moreover, NMR analysis also indicates that the complexes adopt nine-coordinate structures in solution. The luminescent properties of the complexes were investigated in solid, solution and 3 % PMMA. Furthermore, the obtained band gaps fall within the semiconductor range, suggesting their potential application in optoelectronics.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117583"},"PeriodicalIF":4.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the efficiency and stability of perovskite solar cells by incorporating MoS2 nanoparticles into the hole-transport layer 通过在空穴传输层中加入二硫化钼纳米颗粒来提高钙钛矿太阳能电池的效率和稳定性

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-10-03 DOI: 10.1016/j.optmat.2025.117581

A. Кabdiyeva, A. Zeinidenov, D. Abeuov, X. Rozhkova, A. Aimukhanov

{"title":"Enhancing the efficiency and stability of perovskite solar cells by incorporating MoS2 nanoparticles into the hole-transport layer","authors":"A. Кabdiyeva, A. Zeinidenov, D. Abeuov, X. Rozhkova, A. Aimukhanov","doi":"10.1016/j.optmat.2025.117581","DOIUrl":"10.1016/j.optmat.2025.117581","url":null,"abstract":"<div><div>In the paper, MoS<sub>2</sub> nanoparticles were incorporated into HTL PEDOT:PSS of PSC. The effect of their concentration on the morphology and structure of PEDOT:PSS, optical absorption spectra and photoelectric characteristics of PEDOT:PSS in PSC was studied in detail. MoS<sub>2</sub> nanoparticles were synthesized by laser ablation of MoS<sub>2</sub> in isopropanol. Comprehensive analysis of AFM and optical absorption showed that the addition of MoS<sub>2</sub> nanoparticles to HTL leads to an increase in the values of the root-mean-square deviation Sq and the optical band gap. Impedance spectroscopy was used to determine the role of MoS<sub>2</sub> nanoparticles in the charge transfer mechanism in HTL. The measurement results showed that the recombination resistance, which determines the charge recombination rate at the interface boundaries, increases, reaching a maximum value at a MoS<sub>2</sub> concentration of 6 wt%. A further increase in concentration leads to a decrease in the recombination resistance. Measurements of the current-voltage characteristics of PSC show that increasing the concentration of MoS<sub>2</sub> to 6 wt% leads to an increase in the light energy conversion efficiency to 19.19 %. It is explained that the improvement in the photovoltaic characteristics of the devices is associated with an improvement in the transport efficiency in HTL and charge separation at the HTL/perovskite interface, while their deterioration is associated with the release of nanoparticles to the HTL surface, which results in increased charge recombination at the interface boundaries. In addition, MoS<sub>2</sub> nanoparticles in PEDOT:PSS enhance the bond strength and act as a barrier, preventing moisture penetration and, therefore, preventing perovskite degradation.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117581"},"PeriodicalIF":4.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Engineering the p-SnO2/n-Si heterojunction with ultrafast response for broadband photodetection and imaging 设计具有超快响应的p-SnO2/n-Si异质结，用于宽带光探测和成像

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-10-01 DOI: 10.1016/j.optmat.2025.117579

Xiaojun Yin , Li Zhou , Mingqi Yang , Xin Wang , Jinhua Su , Kaifeng Pan , Liang Tian , Xun Kang , Shusheng Pan

{"title":"Engineering the p-SnO2/n-Si heterojunction with ultrafast response for broadband photodetection and imaging","authors":"Xiaojun Yin , Li Zhou , Mingqi Yang , Xin Wang , Jinhua Su , Kaifeng Pan , Liang Tian , Xun Kang , Shusheng Pan","doi":"10.1016/j.optmat.2025.117579","DOIUrl":"10.1016/j.optmat.2025.117579","url":null,"abstract":"<div><div>The p-type nitrogen-doped tin oxide (SnO<sub>2</sub>:N) films were fabricated on n-Si wafers through a combined sputtering and thermal oxidation process. The optimized p-type SnO<sub>2</sub> films manifests a hole concentration of 6.27 × 10<sup>15</sup> cm<sup>−3</sup> and a mobility of 6.92 cm<sup>2</sup>/Vs. The p-SnO<sub>2</sub>:N/n-Si photodetector achieves broadband response from ultraviolet to near-infrared light (255–1040 nm), with a responsivity of 1.17 A/W and detectivity of 3.3 × 10<sup>10</sup> Jones at 740 nm (at 91.6 μW/cm<sup>2</sup>) under 5 V bias. The linear dynamic range reaches 56.27 dB. The high mobility of p-SnO<sub>2</sub>:N films enable rapid separation of photogenerated carriers, yielding exceptional response speeds (13.84 μs rise/28.51 μs day). Remarkably, the devices maintain outstanding stability through 10<sup>4</sup> operational cycles (>5 h). Single-pixel imaging across UV–Vis–NIR spectra has been successfully demonstrated.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117579"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Er3+-doped BaY2F8 for non-contact lifetime thermometry: Combined effects of dopant concentration and programmable UV LED excitation Er3+掺杂BaY2F8用于非接触寿命测温：掺杂浓度和可编程UV LED激发的综合影响

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-30 DOI: 10.1016/j.optmat.2025.117574

Danilo D. Tannus , Adriano B. Andrade , Giordano F.C. Bispo , Sonia L. Baldochi , Zélia S. Macedo , Mário E.G. Valerio

{"title":"Er3+-doped BaY2F8 for non-contact lifetime thermometry: Combined effects of dopant concentration and programmable UV LED excitation","authors":"Danilo D. Tannus , Adriano B. Andrade , Giordano F.C. Bispo , Sonia L. Baldochi , Zélia S. Macedo , Mário E.G. Valerio","doi":"10.1016/j.optmat.2025.117574","DOIUrl":"10.1016/j.optmat.2025.117574","url":null,"abstract":"<div><div>This work presents a luminescence thermometry system based on a programmable electronic module designed for precise control of excitation pulses using a UV LED source, enabling time-resolved measurements of luminescence lifetime. This system was applied to investigate the influence of dopant concentration on the luminescence lifetime of Er<sup>3+</sup> ions in a barium and yttrium fluoride matrix (BaY<sub>2</sub>F<sub>8</sub>) doped with different concentrations (1, 2, and 3 mol%) and their possible effects on thermometric usage. Spectroscopic measurements revealed that the sample with 3 mol% of Er<sup>3+</sup> exhibited the highest luminescence efficiency, without evidence of concentration quenching. The luminescence lifetime decreased with increasing temperature, which was attributed to the increase in nonradiative de-excitation processes observed for all samples. The relative thermal sensitivity (S<sub>r</sub>) was obtained from the lifetime dependence on temperature with the 3 mol% Er<sup>3+</sup>-doped sample presenting the highest S<sub>r</sub>, reaching 0.36 % K<sup>−1</sup> at 317 K, indicating its potential usage as a non-contact luminescent thermometer. The measurements were performed via an electronic module specifically developed for excitation and lifetime-based luminescence detection, allowing precise control of the excitation pulse parameters. The repeatability of the measurements reached approximately 98 %, confirming that the sensor is stable and highly reproducible. The results demonstrate that lifetime-based luminescence thermometry using Er<sup>3+</sup>-doped BaY<sub>2</sub>F<sub>8</sub>, combined with a programmable electronic module for precise excitation and detection control, provides a robust and accessible approach for temperature sensing, reducing the dependence on complex excitation sources, such as lasers, and increasing flexibility in data acquisition.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117574"},"PeriodicalIF":4.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-epitaxial integration of strain-tuned polycrystalline BiFeO3 thin films for silicon-based optoelectronics 应变调谐多晶BiFeO3薄膜在硅基光电子学中的非外延集成

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-30 DOI: 10.1016/j.optmat.2025.117577

Saleh H. Fawaeer , Wala’ M. Al-Qaisi , Vlasta Sedláková , Marwan S. Mousa , Alexandr Knápek , Dinara Sobola

{"title":"Non-epitaxial integration of strain-tuned polycrystalline BiFeO3 thin films for silicon-based optoelectronics","authors":"Saleh H. Fawaeer , Wala’ M. Al-Qaisi , Vlasta Sedláková , Marwan S. Mousa , Alexandr Knápek , Dinara Sobola","doi":"10.1016/j.optmat.2025.117577","DOIUrl":"10.1016/j.optmat.2025.117577","url":null,"abstract":"<div><div>Integrating thin bismuth ferrite films with silicon-based platforms offers a promising path for advanced optoelectronic devices. This work investigates how oxygen partial pressure during pulsed laser deposition governs the structure, microstructure, defect chemistry, and optical properties of BiFeO<sub>3</sub> films grown on Ti-buffered Si. Diffraction and microscopy confirm single-phase rhombohedral perovskite and indicate that the oxygen background tunes the lattice strain states and vacancy proxies. The lower-pressure film exhibits partial relaxed strain, finer grains, and a smaller oxygen-defect fraction, whereas the moderate-pressure film shows stronger tensile lattice strain, rougher grains, and a higher vacancy level. Spectroscopic ellipsometry results, analyzed with a multilayer model that includes buried Ti and TiO<sub>x</sub> interlayers, reveals distinct differences in dielectric dispersion and absorption edges. The lower-pressure film displays direct and indirect bandgaps of about 2.61 and 2.25 eV, while the moderate-pressure film shows slightly larger values of about 2.68 and 2.32 eV. These shifts are consistent with coupled variations in strain and oxygen-related disorder that modulate Fe–O bond lengths and hybridization. Overall, the results demonstrate that pressure-controlled strain and defect engineering can tailor light–matter interaction in Si-integrated BiFeO<sub>3</sub> films for photonic and optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117577"},"PeriodicalIF":4.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple and rapid synthesis of AIE-active GSH-protected copper nanoclusters for fluorometric detection of Cr3+ 用于荧光检测Cr3+的aie活性gsh保护铜纳米簇的简单快速合成

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-30 DOI: 10.1016/j.optmat.2025.117578

Taiqun Yang , Lei Li , Chaoqun Ma , Hui Gao , Chun Zhu , Guoqing Chen

{"title":"Simple and rapid synthesis of AIE-active GSH-protected copper nanoclusters for fluorometric detection of Cr3+","authors":"Taiqun Yang , Lei Li , Chaoqun Ma , Hui Gao , Chun Zhu , Guoqing Chen","doi":"10.1016/j.optmat.2025.117578","DOIUrl":"10.1016/j.optmat.2025.117578","url":null,"abstract":"<div><div>Fluorescent metal nanoclusters (FMNCs) have attracted significant attention in fluorescence sensor research due to their unique optical properties. Herein, glutathione-protected copper nanoclusters (GSH-CuNCs) were rapidly synthesized within 10 min by direct mixing of glutathione and copper nitrate solutions under weakly acidic conditions (pH 5–6). This as-prepared GSH-CuNCs exhibit a pronounced aggregation-induced emission (AIE) effect in ethanol solution. The generated fluorescence excited at ∼330 nm was found to be sensitive to the presence of chromium ions (Cr<sup>3+</sup>), which can be significant quenched by the addition of Cr<sup>3+</sup>. A fluorescent probe was designed for on-off detection of Cr<sup>3+</sup> based on as-synthesized GSH-CuNCs. A linear relationship between fluorescence intensity and Cr<sup>3+</sup> concentration was observed, with a detection limit of 600 nM. This probe is simple and rapid to fabricate, enabling fast and sensitive detection of Cr<sup>3+</sup>. It holds significant potential for practical applications in environmental analysis.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117578"},"PeriodicalIF":4.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable dielectric, electro-optic, and photoluminescence properties of Cu- and Gd-doped ZnO nanocomposites in E7 liquid crystals for device applications 用于器件应用的E7液晶中Cu和gd掺杂ZnO纳米复合材料的可调谐介电、电光和光致发光特性

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-29 DOI: 10.1016/j.optmat.2025.117568

Gülnur Önsal, Umit Hüseyin Kaynar

{"title":"Tunable dielectric, electro-optic, and photoluminescence properties of Cu- and Gd-doped ZnO nanocomposites in E7 liquid crystals for device applications","authors":"Gülnur Önsal, Umit Hüseyin Kaynar","doi":"10.1016/j.optmat.2025.117568","DOIUrl":"10.1016/j.optmat.2025.117568","url":null,"abstract":"<div><div>This study investigates the effects of Cu- and Gd-doped ZnO nanoparticles on the structural, dielectric, electro-optical, and photoluminescence (PL) properties of a nematic E7 liquid crystal matrix. Nanoparticles were synthesized using a microwave-assisted gel combustion method and uniformly dispersed into E7. Dielectric measurements revealed a reduction in permittivity and dielectric strength with both dopants, with Gd:ZnO producing a more pronounced effect. Electro-optical analysis showed that the threshold voltage decreased from 0.78 V (pure E7) to 0.71 V (Gd:ZnO/E7), indicating improved switching characteristics. PL studies demonstrated significant quenching in doped samples, particularly with Gd:ZnO, attributed to deep trap states and non-radiative recombination. Additionally, all doped structures exhibited voltage-induced PL quenching under increasing electric fields. These findings suggest that Cu:ZnO and Gd:ZnO doped LCs offer tunable dielectric and optical responses and are promising candidates for low-power display devices, light modulators, and tunable optoelectronic systems.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117568"},"PeriodicalIF":4.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lead detection based on organometallic platinum (II) complex using surface plasmon resonance sensor 基于表面等离子体共振传感器的有机金属铂（II）配合物铅检测

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-29 DOI: 10.1016/j.optmat.2025.117575

Amir Reza Sadrolhosseini , Mina Sadeghian , Mohsen Golbon Haghighi , Arash Shirshahi , Ali Bizhanifar , Seyedeh Mehri Hamidi , Ali Talib Bader

{"title":"Lead detection based on organometallic platinum (II) complex using surface plasmon resonance sensor","authors":"Amir Reza Sadrolhosseini , Mina Sadeghian , Mohsen Golbon Haghighi , Arash Shirshahi , Ali Bizhanifar , Seyedeh Mehri Hamidi , Ali Talib Bader","doi":"10.1016/j.optmat.2025.117575","DOIUrl":"10.1016/j.optmat.2025.117575","url":null,"abstract":"<div><div>A novel application of an organometallic platinum (II) complex, K[Pt(dfppy)(<em>p</em>-MeC<sub>6</sub>H<sub>4</sub>)(CN)], is reported for the selective detection of lead ion using a surface plasmon resonance imaging (SPRi) platform. The complex was synthesized via the reaction of [Pt(dfppy)(<em>p</em>-MeC<sub>6</sub>H<sub>4</sub>)(SMe<sub>2</sub>)] with KCN in a methanol–water medium and characterized by NMR, FT-IR, and UV–vis spectroscopies. The resulting yellow complex was drop-cast onto a gold-coated glass substrate to form the sensing layer, whose morphology and optical response were analyzed using scanning electron microscopy (SEM) and SPRi techniques, respectively. The sensing behavior of the fabricated layer was evaluated toward Pb<sup>2+</sup>, Hg<sup>2+</sup>, Zn<sup>2+</sup>, and Ni<sup>2+</sup> ions at various complex concentrations (10<sup>−3</sup>, 10<sup>−4</sup>, and 10<sup>−5</sup> M). Among the tested ions, the sensor exhibited the strongest response to Pb<sup>2+</sup>, with a detection limit as low as 0.05 ppm. This study reports a simple and effective approach for plasmonic detection of lead ions with high sensitivity and selectivity using a cyclometalated platinum(II) complex.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117575"},"PeriodicalIF":4.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental elucidation of nematic host-driven modulation of Bragg reflection in cholesteric liquid crystals 胆甾液晶中Bragg反射向列宿主驱动调制的实验研究

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-29 DOI: 10.1016/j.optmat.2025.117576

Ramin Khalil Sarbaz , Mohammadsadeg Zakerhamidi , Behroz Rezaei , Amid Ranjkesh

{"title":"Experimental elucidation of nematic host-driven modulation of Bragg reflection in cholesteric liquid crystals","authors":"Ramin Khalil Sarbaz , Mohammadsadeg Zakerhamidi , Behroz Rezaei , Amid Ranjkesh","doi":"10.1016/j.optmat.2025.117576","DOIUrl":"10.1016/j.optmat.2025.117576","url":null,"abstract":"<div><div>This experimental study explores the critical role of the host nematic liquid crystal environment in modulating selective Bragg reflection in cholesteric liquid crystals, which possess a self-organized helical superstructure capable of reflecting circularly polarized light within a specific wavelength band. By incorporating 2.45 wt% of the chiral dopant R5011 into five distinct NLC hosts (ML-0648, E7, RDP84685, MLC-2053, and MLC-2048), we systematically investigate the influence of host-specific parameters (such as birefringence, refractive index, and molecular compatibility) on key optical features, including central Bragg reflection wavelength, bandwidth, and helical twisting power. Our findings reveal a tunable Bragg reflection range from 499 nm (ML-0648) to 754 nm (MLC-2048), strongly governed by the cholesteric pitch and host refractive index. The reflection bandwidth spans 23–86 nm, with broader spectra observed in hosts exhibiting higher birefringence. Notably, ML-0648, chemically similar to the chiral dopant, achieves the highest helical twisting power value of 123.88 μm<sup>−1</sup>, underscoring the importance of host–dopant molecular affinity. Furthermore, doping E7 with varying S5011 concentrations (2.30–3.42 wt %) produces a pronounced blue shift in central Bragg reflection wavelength, alongside an inverse correlation between reflection bandwidth and dopant concentration. These results elucidate the tunability of optical properties in cholesteric liquid crystals via strategic host selection, offering valuable insights for designing advanced optical devices such as tunable filters, reflective displays, and chiral photonic structures.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117576"},"PeriodicalIF":4.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Divulging the effect of compositional variation (Li+, Zn2+, B3+, Ti4+) on color tunable luminescence of Tb3+- Sm3+ ions co-doped tellurite glasses for solid state laser applications 揭示了Li+、Zn2+、B3+、Ti4+组成变化对Tb3+- Sm3+离子共掺碲酸盐玻璃固态激光色调发光的影响

IF 4.2 3区材料科学

Optical Materials Pub Date : 2025-09-29 DOI: 10.1016/j.optmat.2025.117571

Sourav Ghosh , Joydeb Biswas

{"title":"Divulging the effect of compositional variation (Li+, Zn2+, B3+, Ti4+) on color tunable luminescence of Tb3+- Sm3+ ions co-doped tellurite glasses for solid state laser applications","authors":"Sourav Ghosh , Joydeb Biswas","doi":"10.1016/j.optmat.2025.117571","DOIUrl":"10.1016/j.optmat.2025.117571","url":null,"abstract":"<div><div>A new batch of Tb<sup>3+</sup>/Sm<sup>3+</sup> co-imbued tellurite glasses based on the compositional variation of oxidation state (where, X = Li<sup>+</sup>, Zn<sup>2+</sup>, B<sup>3+</sup>, Ti<sup>4+</sup>) have been prepared by the melt quenching method for color tunable solid state laser applications. The detailed structural information of the present glass system has been analyzed by performing XRD and FTIR measurements. Luminescence spectra of the titled glasses evince two strong emissions at 542 nm (<strong>green</strong>: Tb<sup>3+</sup> ions) and 599 nm (<strong>orange</strong>: Sm<sup>3+</sup> ions). The spectral overlapping of the emission spectra of Tb<sup>3+</sup> ions and the excitation spectra of Sm<sup>3+</sup> ions ensures the effective energy transfer from Tb<sup>3+</sup>→ Sm<sup>3+</sup> ions. The emission intensity as well as the luminescence decay lifetime becomes shorter with change in oxidation state of incorporated metal oxides owing to the dominance of phonon relaxation and increment of the traps and defects within the glass network. The shifting of the emitted color tone towards reddish-orange region in CIELab space highlights that the investigated glasses hold promise for use in tunable solid-state laser systems. These research findings provide a strong foundation for the development of new materials for advancement in laser technologies.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"169 ","pages":"Article 117571"},"PeriodicalIF":4.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0