Optical Materials最新文献

{"title":"Y6 derivatives for near-infrared organic photodetectors with enhanced specific detectivity","authors":"Hyung Jin Cheon ,&nbsp;Eunyong Seo ,&nbsp;Sinhui Min ,&nbsp;Donggu Lee ,&nbsp;Yun-Hi Kim","doi":"10.1016/j.optmat.2025.117456","DOIUrl":"10.1016/j.optmat.2025.117456","url":null,"abstract":"<div><div>Recently, the advancement of non-fullerene acceptors (NFAs) for near-infrared (NIR) organic photodetectors (OPDs) has garnered significant attention due to their superior NIR light absorption characteristics. Notably, the attractive properties of Y6 and its derivatives, such as enhanced π-π stacking and stronger NIR absorption, can enhance the performance of optical photodetectors due to improved intermolecular stacking, optical absorption, and charge transfer properties. Herein, we designed and synthesized two fused small molecules, <strong>BTP-eC9-4F</strong> and <strong>BTP-eC9-4Cl</strong>, for efficient bulk heterojunction NIR OPDs. The OPDs with these NFAs exhibited excellent performance, extending their spectral response from the visible (Vis) to the NIR region. Specifically, devices with <strong>BTP-eC9-4Cl</strong> exhibited a specific detectivity (D∗) of 8.49 <span><math><mrow><mo>×</mo></mrow></math></span> 10¹⁰ Jones at 850 nm under a -2V bias, attributed to its optimized molecular design, which leads to reduced dark current density with relative deep energy improved morphology, its potential for high-performance NIR OPD applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117456"},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932076","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}

{"title":"The effect of aging on the preparation of co-precipitation Mg–Al spinel powders and transparent ceramics","authors":"Jianjun Zeng ,&nbsp;Kuibao Zhang ,&nbsp;Xi Zhang ,&nbsp;Shengquan Yu","doi":"10.1016/j.optmat.2025.117458","DOIUrl":"10.1016/j.optmat.2025.117458","url":null,"abstract":"<div><div>The co-precipitation method allows rapid and large-scale preparation of highly active Mg–Al spinel precursors, but the crystalline growth of precursors affects the activity of the calcined powders. In the study, the stirring is introduced to inhibit the crystal growth during aging. The effects of stirring during aging on the grain growth of precursors, the phase composition and morphology of calcined powders and the optical transmittance of ceramics were comparatively investigated. It is found that the rod-like morphology obtained by static aging would be retained after calcination, resulting in the formation of a small number of pores in the HIPed ceramics. The stirring effect inhibits the growth of the precursor and molds it into granular-like particles, resulting in spherical-like particles of approximately 50 nm after calcination. The transmittance of stirred aging in the near-infrared wavelength band is also above 80 % (1000–1500 nm) and the maximum transmittance of 84 % can be achieved at 1300 nm wavelength.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117458"},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921596","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}

{"title":"Polarization insensitive cross resonator based highly sensitive metamaterial absorber for pH level monitoring","authors":"Md Kutub Uddin ,&nbsp;Touhidul Alam ,&nbsp;Mohammad Lutful Hakim ,&nbsp;Heba G. Mohamed ,&nbsp;Mohamad A. Alawad ,&nbsp;Abdulmajeed M. Alenezi ,&nbsp;Mohammad Tariqul Islam","doi":"10.1016/j.optmat.2025.117460","DOIUrl":"10.1016/j.optmat.2025.117460","url":null,"abstract":"<div><div>Monitoring pH is a crucial parameter in agriculture to ensure crop health and maximize productivity, as pH directly influences nutrient availability and plant growth. This article introduces a cross-shaped resonator-based metamaterial absorber (CRMMA) for microwave pH sensing applications. The proposed CRMMA sensor offers significant advantages over conventional pH sensors with the ability to respond to a wide range of pH levels and detect even minute fluctuations. The CRMMA is engineered by utilizing a cross-shaped resonator in every quarter of a four-fold rotationally symmetric structure, achieving incident angle stability and polarization insensitivity. This compact design has a subwavelength unit cell of 0.123λ × 0.123λ × 0.018λ mm³. Additionally, the CRMMA achieves an impressive absorption rate of 99.876 % at 3.5 GHz. The permittivity, permeability, electromagnetic field distribution, and surface current distribution of the sensor were thoroughly analyzed, revealing consistent performance across TE and TM polarization modes. A 106 × 106 mm² array prototype was fabricated to validate the scattering parameters and absorption characteristics, with real-time experimental results closely aligning with simulation results. The pH sensing capability of the proposed MMA was also tested in coco peat, where the sensor demonstrated a high sensitivity of 5.14, a high Q-factor of 619.47, and a high figure of merit (FoM) of 3184.07. The results demonstrate that the proposed CRMMA is an efficient and compact solution for real-time, high-precision pH monitoring in agricultural applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117460"},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009987","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}

{"title":"Microstructure and photoluminescence of Eu-doped NiMoO4 phosphors","authors":"Ye Eun Kim ,&nbsp;Seungyong Shin ,&nbsp;Sangmin Lee ,&nbsp;Yeomin Yoon ,&nbsp;Ho Seong Jang ,&nbsp;Dong Hun Kim","doi":"10.1016/j.optmat.2025.117459","DOIUrl":"10.1016/j.optmat.2025.117459","url":null,"abstract":"<div><div>In this study, Eu³⁺-activated α-NiMoO₄ red phosphors were synthesized through a mass-producible solid-state reaction for potential applications in white light-emitting diodes aimed at next-generation lighting solutions. The structural, morphological, and photoluminescence properties of α-NiMoO₄:Eu³⁺ phosphors were systematically investigated as a function of Eu³⁺ concentration and calcination temperature. Compared to Ni sites, substituting Eu at Mo sites led to the formation of a higher proportion of secondary phases, which resulted in reduced luminescence intensity. Consequently, our investigation focused on the synthesis of Ni_1-xEu_xMoO₄ phosphors, where Eu³⁺ doping up to 5 at.% yielded a single-phase material, whereas higher doping levels promoted the formation of secondary phases. As the doping concentration increased, the PL intensity initially increased, reaching a maximum at 20 at.% Eu³⁺ content, and subsequently declined due to concentration quenching effects. The Ni_0.8Eu_0.2MoO₄ powders calcined at 1100 °C demonstrated excellent thermal stability, maintaining approximately 75.2 % of their initial PL intensity at 200 °C. These results highlight that α-NiMoO₄:Eu³⁺ phosphors, synthesized through a simple and industrially scalable method, are promising candidates for high-performance, thermally stable red-emitting materials, well-suited for solid-state lighting and other optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117459"},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925564","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}

{"title":"The bimetallic synergistic enhancement of photothermal properties in tannic acid-grafted MoS2","authors":"Tianbao Wu ,&nbsp;Xueping Fan ,&nbsp;Chao Wang ,&nbsp;Guozhi Jia","doi":"10.1016/j.optmat.2025.117454","DOIUrl":"10.1016/j.optmat.2025.117454","url":null,"abstract":"<div><div>We systematically investigated the optical and photothermal properties of bimetallic complexation in tannic acid-grafted MoS₂ (TA-MoS₂). The TA-MoS₂ nanosheets were synthesized via an ultrasound-assisted oil-bath method. Afterwards, transition metals (TM = Fe, Co, Ni, Cu and Zn) were introduced into TA-MoS₂. The optical absorption coefficient of TM/TA-MoS₂ increased with fewer valence electrons of the TM. Based on Fe/TA-MoS₂, the introduction of other TMs forms bimetallic Fe-TM/TA-MoS₂. The Fe–Ni/TA-MoS₂ membrane with high-transmittance exhibits the optimal photothermal properties compared with the various compositions. Importantly, its highest equilibrium temperature was 33.1 °C higher than that of the pristine TA-MoS₂, and the transmittance remains above 80 %. Based on first-principles calculations, the high optical absorption coefficient of Fe–Ni/TA-MoS₂ originates from the multi-electron impurity bands formed by Fe–Ni atoms. The design of a synergistic coordination effect between dual TMs paves a new way for developing architectural photothermal glass.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117454"},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932075","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}

{"title":"Thickness-dependent linear and nonlinear optical properties of spin-coated iron (III) tetraphenylporphyrin chloride thin films","authors":"Amr Attia Abuelwafa,&nbsp;Sabrien M. Abdelhamid,&nbsp;M. Dongol,&nbsp;A.F. Elhady","doi":"10.1016/j.optmat.2025.117447","DOIUrl":"10.1016/j.optmat.2025.117447","url":null,"abstract":"<div><div>This study investigated the thickness-dependent structural, linear, and nonlinear optical properties of spin-coated iron (III) tetraphenylporphyrin chloride (FeTPPCl) thin films. Thin films with thicknesses ranging from 90 to 480 nm were fabricated on quartz substrate via spin coating method, and then characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), Raman spectroscopy, UV–Vis–NIR spectroscopy, and photoluminescence (PL) spectroscopy. The results revealed that film thickness significantly influenced crystallinity, surface morphology, and optical behavior. Thicker films exhibited significantly increased crystallite size (from 23.09 to 50.18 nm), enhanced crystallinity, and reduced structural defects, as evidenced by XRD analyses and SEM images. UV–Vis spectroscopy showed a redshift in absorption peaks and a systematic reduction in the optical bandgap with increasing thickness. Urbach energy (E_U) analysis indicated a decrease in disorder and localized states in thicker thin films, corroborating improved structural order. Photoluminescence (PL) studies revealed a thickness-dependent emission redshift and intensity increase, attributed to enhanced crystallinity and reduced surface traps. The absorbance coefficient (α) was employed to identify the nature of optical transitions in the films. The optical constants and dielectric properties exhibited notable thickness-dependent trends, consistent with the Wemple-DiDomenico and Sellmeier models. Furthermore, nonlinear optical properties, including third-order susceptibility <span><math><mrow><mo>(</mo><msup><mi>χ</mi><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></msup><mo>)</mo></mrow></math></span>, nonlinear refractive index <span><math><mrow><mrow><mo>(</mo><mrow><mspace></mspace><msub><mi>n</mi><mrow><mn>2</mn><mspace></mspace></mrow></msub></mrow><mo>)</mo></mrow><mtext>,</mtext></mrow></math></span> and two-photon absorption coefficient (βc), were modulated by film thickness, highlighting FeTPPCl's potential for nonlinear optical applications. These findings underscore the critical role of thickness control in tailoring the optoelectronic performance of solution-processed FeTPPCl thin films for advanced device applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117447"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917019","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}

{"title":"Reflection structural colors based on Fano resonance in planar optical nanocavities with Sb2Te3 layer","authors":"Chunyu Wang,&nbsp;Hua Lu,&nbsp;Jiadeng Zheng,&nbsp;Dikun Li,&nbsp;Yiqiao Zhang,&nbsp;Jianxu Zhao,&nbsp;Jianlin Zhao","doi":"10.1016/j.optmat.2025.117452","DOIUrl":"10.1016/j.optmat.2025.117452","url":null,"abstract":"<div><div>Planar optical nanocavities play crucial roles in light interactions with matters and structural colors. The purity of reflection structural color is generally limited by the resonant absorption of light, especially in metal-based nanocavities. Herein, we propose and fabricate a novel kind of planar metal-based nanocavities integrated with an ultrathin antimony telluride (Sb₂Te₃) layer to generate Fano resonance effect for achieving the vivid reflection colors, which present the higher purity than those of traditional metal/dielectric/metal cavities. The results show that the Sb₂Te₃/ITO/Ag nanofilm possesses strong light absorption in the entire visible region. The integration of this nanofilm with the ITO and Ag layers can give rise to the generation of Fano resonance effect with the low light absorption and narrow reflection peak. The experiments agree excellently with the simulations. The Fano resonance effect can be derived from the coupling interference between the wide-spectrum lossy resonance (continuum state) in Sb₂Te₃/ITO/Ag nanofilm and narrow-spectrum resonance (discrete state) in Ag/ITO/Ag nanocavity. We achieve the high-purity reflection structural colors in the planar nanocavities and vivid color printing based on the Fano resonance effect by using grayscale focused ion beam (FIB) lithography. This work will pave a new avenue for the realization of Fano resonance and its application in high-performance reflection color printing.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117452"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921597","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}

{"title":"Quantification of nitrogen in HPHT diamond: A synergistic approach combining FTIR and EPR validation","authors":"Jiao Yang ,&nbsp;Haikuo Wang ,&nbsp;Yijin Xie ,&nbsp;Zhicai Zhang ,&nbsp;Yao Tang ,&nbsp;Zhiqiang Hou ,&nbsp;Chao Wang ,&nbsp;Hao Li ,&nbsp;Yikan Yang ,&nbsp;Jun Gao ,&nbsp;Derong Shou ,&nbsp;Xiaoping Ouyang","doi":"10.1016/j.optmat.2025.117450","DOIUrl":"10.1016/j.optmat.2025.117450","url":null,"abstract":"<div><div>Nitrogen in diamond is a prerequisite for the formation of nitrogen-vacancy (NV) center, making precise quantification of nitrogen concentration critical for diamond-based sensors and quantum devices. This study aims to address the significant quantitative deviation (approximately 61 %) caused by the nitrogen doping inhomogeneity in high-pressure and high-temperature (HPHT) diamonds and the spatial resolution constraints of fourier transform infrared spectroscopy (FTIR) characterization through a FTIR averaging method across the entire diamond slice region to quantify nitrogen concentration. Quantitative analysis demonstrates that for HPHT diamond, a single region in nitrogen concentration determined by FTIR exhibits excellent reproducibility with a standard deviation of approximately 6 %, while the standard deviation across the entire diamond slice is reduced to approximately 20 %. Moreover, combining electron paramagnetic resonance (EPR) method, the average nitrogen concentration values measured by FTIR across the entire diamond slice region exhibit good linear correlation (R² &gt; 0.98) with EPR results, indirectly validating the reliability of our characterization approach used in this paper for nitrogen quantification. This study can provide a reference scheme for the quantitative analysis of nitrogen in HPHT diamonds and lay a solid foundation for the controlled preparation and optimization of quantum sensing materials based on HPHT diamonds in future research.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117450"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921598","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}

{"title":"Interface quality variations of La/B4C multilayer with increasing period number","authors":"Fenghua Li ,&nbsp;Jiaoling Zhao ,&nbsp;Xiaoran Li ,&nbsp;Hetao Tang ,&nbsp;Ge Zhang","doi":"10.1016/j.optmat.2025.117451","DOIUrl":"10.1016/j.optmat.2025.117451","url":null,"abstract":"<div><div>The interface quality of La/B₄C RMs with increasing period number is investigated by x-ray reflectivity (XRR), atomic force microscopy (AFM), x-ray diffuse scattering (XDS), and transmission electron microscopy (TEM). The results demonstrate that the interface diffusion remains constant while interface roughness is a variable as the period number increases from 25 to 250. The interface diffusion of B₄C-on-La and La-on-B₄C are about 0.55 nm and 0.29 nm, respectively. Moreover, as the period number increases from 25 to 250, the interface roughness of B₄C-on-La increases from 0.12 to 0.3 nm and that of La-on-B₄C increases from 0.1 to 0.19 nm. The interface diffusion exhibits a significant asymmetry, while the interface roughness presents a certain trend of asymmetry. Therefore, the obvious asymmetry of interface is mainly attributed to the asymmetric interface diffusion.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117451"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920375","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}

{"title":"Morphology engineering of dual-emissive copper-based perovskites for stable blue LED devices","authors":"Juin J. Liou ,&nbsp;Yu Zhang ,&nbsp;Siyao Li ,&nbsp;Yuqing Ren ,&nbsp;Xianting Zhang ,&nbsp;Hsin-Han Peng ,&nbsp;Hsiang-Chen Chui","doi":"10.1016/j.optmat.2025.117444","DOIUrl":"10.1016/j.optmat.2025.117444","url":null,"abstract":"<div><div>Copper-based ternary halide composites have garnered significant attention for their exceptional chemical stability and optical properties. Here, we report the one-step synthesis of dual-emissive Cs₃Cu₂I₅:CsI perovskite nanocrystals (NCs) via a facile anti-solvent method. Under 295 nm excitation, these NCs exhibit blue emission centered at 450 nm, while 350 nm excitation induces violet emission peaking at 427 nm. The material demonstrates a high photoluminescence quantum yield (PLQY &gt;55 %) and remarkable stability (&gt;30 days in ethanol). Morphological evolution from needle-like to rod-like and irregular bulky to well-defined cubic structures was achieved by precisely modulating precursor stoichiometry and reaction temperature. Furthermore, we fabricated highly stable blue LEDs based on Cs₃Cu₂I₅:CsI perovskite, achieving CIE 1931 chromaticity coordinates of (0.20, 0.25). The devices retained 90.3 % of initial luminance after 192 h of continuous operation.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117444"},"PeriodicalIF":4.2,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913851","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}