Optical Materials最新文献

{"title":"Study on haze defects in CVD-ZnSe: Performance, microstructure and suppression","authors":"Yuanqing Li ,&nbsp;Dongxu Li ,&nbsp;Shuyang Li ,&nbsp;Zeyu Liu ,&nbsp;Naiguang Wei","doi":"10.1016/j.optmat.2026.117889","DOIUrl":"10.1016/j.optmat.2026.117889","url":null,"abstract":"<div><div>Haze is a prevalent defect limiting the optical performance and utilization of bulk CVD-ZnSe infrared windows. In this work, four CVD-ZnSe batches with different haze levels were prepared by varying the Zn/Se molar ratio of the reactants. Spectrophotometry, haze values, transmission polarizing microscopy, stress-birefringence mapping, EBSD, and TEM/HRTEM were combined to quantify performance, resolve microstructural origins, and propose strategies for haze suppression. The results show that haze mainly decreases visible-band transmittance. Microstructurally, grains are composed of twin lamellae with varying thickness. Σ3 lamellar twin boundaries with clustered stacking faults locally convert zinc blende stacking into hexagonal sequences, producing intrinsic birefringence that scatters light. Hazy samples thus include more twin boundaries. A semi-empirical internal-interface scattering model fitted to spectra reproduces both the curve trend and the wavelength dependence of the transmittance loss, corroborating internal scattering from hexagonally stacked lamellae as the primary haze mechanism. Haze value is introduced to describe scattering in materials to characterize defects. The haze value enables a four-grade classification (severe, moderate, slight, and clear) that is consistent with visible-band transmittance, macroscopic appearance, and microstructural indicators, and provides a practical quality criterion. In part of slightly hazy CVD-ZnSe, abnormal columnar growth introduces anisotropy and residual stress that dominate in-plane optical nonuniformity. Reducing twins and stabilizing equiaxed growth are crucial for haze suppression. Zn/Se molar ratio of reactants (≈1.2) and CVD chamber flow-field uniformity suppress haze defects, improve transmittance, and enhance consistency in CVD-ZnSe.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117889"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025520","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":"Polytungsten-oxygen clusters inducing crystallization for high performance of WO3 electrochromic films","authors":"Jiasheng Fang ,&nbsp;Yu Gong ,&nbsp;Likun Wang ,&nbsp;Gang Xu ,&nbsp;Sainan Ma ,&nbsp;Yong Liu ,&nbsp;Gaorong Han","doi":"10.1016/j.optmat.2026.117902","DOIUrl":"10.1016/j.optmat.2026.117902","url":null,"abstract":"<div><div>The electrochromic properties of tungsten trioxide (WO₃) films exhibit a significant dependence on their crystallinity. In this study, polytungsten-oxygen clusters were introduced into the precursor solution via the low-temperature sol-gel method to successfully fabricate nanocrystals-embedded amorphous WO₃ composite (nc-WO₃@a-WO₃) films. It was found that the incorporation of polytungsten-oxygen clusters serves a dual function: (1) increasing the solution viscosity to enable precise control of the spin-coated film thickness, and (2) acting as nucleation sites to induce the crystallization of hexagonal WO₃ (h-WO₃), resulting in WO₃ nanocrystals with uniform size in the amorphous substrate after annealing at 300 °C. XPS and HRTEM characterizations revealed that the nc-WO₃@a-WO₃ film possesses a higher concentration of oxygen vacancies and abundant amorphous/crystalline interfaces. This unique nanostructure endows the WO₃ film with superior electrochromic properties, including high modulation amplitude (ΔT = 83 % at 633 nm), rapid switching time (11.5 s/7 s for coloring and bleaching), and excellent cycling stability (the transmittance modulation loss was 25 % after 4500 cycles). The design of nanocrystals confined within an amorphous matrix provides a new strategy for the fabrication of high-stability electrochromic supercapacitor devices and smart energy-efficient windows.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117902"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025639","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":"Phase-specific detection of CO2 at sequestration pressure using mid-infrared fluoride fiber sensors","authors":"Ai Hosoki ,&nbsp;Airi Suka ,&nbsp;Hideki Kuramitz ,&nbsp;Akira Ueda ,&nbsp;Amane Terai","doi":"10.1016/j.optmat.2026.117986","DOIUrl":"10.1016/j.optmat.2026.117986","url":null,"abstract":"<div><div>Monitoring dissolved CO₂ under high-pressure conditions is important for subsurface environments relevant to geological sequestration. In this study, we report mid-infrared CO₂ absorbance measurements using compact attenuated total reflection (ATR) fiber-optic sensors. Two fluoride-fiber probes—a side-polished ZBLAN fiber and a tapered InF₃ fiber—were fabricated and evaluated in a pressure- and temperature-controlled system at 40 °C up to 8 MPa. CO₂ was detected in gaseous, aqueous, and supercritical states via distinct absorption features near 4.2 μm. In the aqueous phase, the ZBLAN sensor showed an approximately linear response and achieved a limit of detection of 7.03 mmol/L, while the InF₃ sensor enabled reliable detection of gaseous and supercritical CO₂. These results demonstrate phase-resolved CO₂ sensing with fluoride-fiber ATR probes under sequestration-relevant conditions and support their potential for in situ monitoring in subsurface systems, including geological sequestration and carbon-recycled geothermal applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117986"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385142","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":"One-step encapsulation of CsPbBr3 nanocrystals with customized polyethylene glycol for single-molecule localization microscopy imaging of cellular microstructures","authors":"Zhaoyan Yang ,&nbsp;Yeming Qing ,&nbsp;Kai Zhu ,&nbsp;Kuo Yang ,&nbsp;Shenfei Zong ,&nbsp;Zhuyuan Wang","doi":"10.1016/j.optmat.2026.117987","DOIUrl":"10.1016/j.optmat.2026.117987","url":null,"abstract":"<div><div>All-inorganic perovskite nanocrystals have emerged as highly effective fluorophores for single molecule localization microscopy (SMLM) imaging due to their remarkable blinking behavior, high photoluminescence quantum yields, and facile synthesis methods. However, the development of all-inorganic perovskite nanocrystals with targeting imaging properties has been limited by their insufficient stability, which presents challenges for their application in the SMLM imaging of cellular microstructures. Herein, a straightforward approach is demonstrated by conjugating cesium lead bromide perovskite nanocrystals (CsPbBr₃ NCs) with streptavidin (SA) using ester-functionalized carboxyl polyethylene glycol (COOH-PEG-NHS) to achieve a core-shell composite of SA-modified CsPbBr₃ NCs (CsPbBr₃@SA) as an immunofluorescence nanoprobe for SMLM imaging of cellular microstructures. The COOH-PEG-NHS served as a bridging agent that initially reacted with the amine groups of the SA and subsequently integrated with CsPbBr₃ NCs in a single-step process to minimize the impact of the biological modification process on the optical properties of the CsPbBr₃@SA nanoprobe. The obtained CsPbBr₃@SA exhibits a significant fluorescence characteristic along with the frequent blinking phenomena. Moreover, SMLM imaging of CsPbBr₃@SA demonstrated a localization precision of approximately 3 nm and an elevenfold enhancement in spatial resolution. Furthermore, CsPbBr₃@SA was utilized to label the nuclear lamina of the nuclear envelope via immunofluorescence technique. The improved spatial resolution suggests that CsPbBr₃@SA is capable of facilitating SMLM imaging of the nuclear lamina. This innovative biological modification method presents significant potential for improving the biological application of all-inorganic perovskite nanocrystals in SMLM.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117987"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385262","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":"Optimization of polishing parameters for surface roughness and material removal in chemical mechanical polishing of hard optical materials","authors":"Djouda Laadjel ,&nbsp;Nabil Belkhir ,&nbsp;Edda Rädlein","doi":"10.1016/j.optmat.2026.117988","DOIUrl":"10.1016/j.optmat.2026.117988","url":null,"abstract":"<div><div>In this work, a comprehensive chemo-mechanical polishing (CMP) study was conducted on two technologically important materials, the glass ceramic Zerodur® and a transparent Spinel ceramic under strictly controlled and identical process conditions. The novelty of this study lies in its mechanistic, side-by-side evaluation of two materials with fundamentally different hardness, microstructure, and chemical reactivity, enabling new insight into the governing abrasive–workpiece interactions during CMP. Systematic parametric analyses were performed to quantify the influence of pressure, relative velocity, slurry concentration, polishing time, and abrasive type (alumina vs. ceria) on both material removal rate and surface evolution. Particular attention is given to the distinct mechanical and chemical contributions of the two abrasives, revealing why ceria despite its known chemical reactivity with silicate systems performs sub-optimally on Zerodur® compared to alumina. The optimized CMP conditions yielded ultra-smooth surfaces, achieving RMS roughness values below 1 nm for Zerodur® and below 3 nm for spinel. The results establish a unified mechanistic framework for understanding and optimizing the CMP of advanced hard optical materials, and establishing a mechanistic framework that supports the optimization of CMP processes for advanced hard optical materials.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117988"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385265","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":"Study of ZnS:Ag and BaMgAl10O17:Eu2+ phosphor for UV-to-PAR spectral conversion greenhouse coatings","authors":"Chun-Ting Cho,&nbsp;Erik van der Kolk","doi":"10.1016/j.optmat.2026.117945","DOIUrl":"10.1016/j.optmat.2026.117945","url":null,"abstract":"<div><div>Spectral conversion films and coatings based on photoluminescent materials have attracted increasing attention for greenhouse applications and are reported to provide a net benefit through spectral control. However, there is little experimental data on spectral conversion coating that quantifies their optical properties, including absorption, transmittance, scattering loss, and the influence of the phosphor intrinsic parameters. In this work, UV-to-PAR spectral conversion coatings based on two commercial phosphors ZnS:Ag and BaMgAl₁₀O₁₇:Eu²⁺ (BAM:Eu), with different particle loading and thickness, were fabricated and assessed by direct transmittance, hemispherical light transmittance (T_HEM), and diffuse reflectance. Transmittance decreased with increasing coating thickness and particle loading, whereas backward scattering showed the opposite trend. Performance indicators derived from direct transmittance revealed that host-absorption ZnS:Ag coatings exhibited greater UV absorption and higher PAR Enhancement than activator-absorption BAM:Eu coatings, resulting from their higher absorption coefficient. Quantum yield had a minimal impact because both phosphors displayed close PLQY values. However, the backward scattering of ZnS:Ag coatings was more pronounced than that of BAM:Eu coating due to the high refractive index of ZnS:Ag (n ≈ 2.3), as confirmed by diffuse reflectance measurements. The 18 mass%, 200 μm ZnS:Ag coating showed the highest 1.3% PAR Enhancement, but its T_HEM was reduced by about 45%, demonstrating that backward scattering can counteract the benefits of spectral conversion. A general discussion for phosphor selection in greenhouse applications is also provided in this work.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117945"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385267","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":"Unveiling the gamma radiative response on structural and optical features of CeO2 doped sodium niobium phosphate glasses","authors":"Abhiram Senapati ,&nbsp;Suvendu Kumar Barik ,&nbsp;Satendra Kumar ,&nbsp;Sujoy Sen ,&nbsp;Ramani Yuvaraj ,&nbsp;S. Balakrishnan ,&nbsp;Hrudananda Jena","doi":"10.1016/j.optmat.2026.117916","DOIUrl":"10.1016/j.optmat.2026.117916","url":null,"abstract":"<div><div>The incorporation of CeO₂ into glass has garnered significant attention owing to its strong optical absorption nature, thereby promising it for innovative optical applications. This research highlights the gamma irradiation-induced structural and optical modifications in CeO₂-containing sodium niobium phosphate glasses by Fourier-transform infrared (FTIR) and ultraviolet–visible (UV–Vis) spectroscopic techniques. FTIR spectra depicted minor changes in the vibrational modes of the phosphate networks at a cumulative dose of 1 MGy, affirming the pivotal role of cerium in preserving the glass's structural integrity. The optical absorption edge, optical band gap (E_g), refractive indices (n) and Urbach energy (E_u) are derived from the UV–Vis spectra recorded between 200 and 1100 nm. Radiation-induced absorption spectra revealed the distinct defect bands attributed to positively charged hole center defects (POHCs) at ∼593 nm and ∼722 nm, whereas negatively charged electron center defects (ECs) in the high-energy regions (<span><math><mi>P</mi><msub><mi>O</mi><mn>3</mn></msub></math></span>- EC at 217 nm, <span><math><mi>P</mi><msub><mi>O</mi><mn>2</mn></msub></math></span>- EC at 264 nm, and <span><math><mi>P</mi><msub><mi>O</mi><mn>4</mn></msub></math></span>- EC at 229 nm). A systematic red shift in the UV absorption edge is encountered with increased CeO₂ content. Tauc and Urbach plot analysis indicate that CeO₂ stabilizes the oxygen-related hole defects, reducing radiation-induced disorder. A CeO₂-dependent rise in the refractive index value correlates with enhanced non-bridging oxygen (NBOs) density. Further, the minimal E_u variation in post-gamma-irradiated glasses supports effective suppression of electronic defect states. These findings diversify the potential of CeO₂-modified niobium phosphate glasses towards radiation-resistant optical applications, such as gamma shielding, optical fibres in nuclear reactors and can be tailored to integrated planner optical waveguides.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117916"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080242","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":"Tunable up-conversion and down-conversion photoluminescence of HfO2:Er3+ and HfO2:Er3+/Yb3+ coatings formed by plasma electrolytic oxidation of hafnium","authors":"Stevan Stojadinović ,&nbsp;Aleksandar Ćirić","doi":"10.1016/j.optmat.2026.117907","DOIUrl":"10.1016/j.optmat.2026.117907","url":null,"abstract":"<div><div>This study examines the structural and photoluminescent properties of HfO₂ coatings doped with Er³⁺ and co-doped with Yb³⁺, prepared on hafnium substrates using the plasma electrolytic oxidation (PEO) technique with electrolytes containing Er₂O₃ and Yb₂O₃ particles. The coatings are crystalline and consist of monoclinic and tetragonal phases of HfO₂ Incorporation of Er and Yb into the HfO₂ lattice induces a phase transformation, stabilizing the tetragonal phase. Up-conversion (UC) photoluminescence (PL) of HfO₂:Er³⁺ and HfO₂:Er³⁺/Yb³⁺ under 980 nm excitation shows characteristic green (²H_11/2, ⁴S_3/2 → ⁴I_15/2) and red (⁴F_9/2 → ⁴I_15/2) emissions from Er³⁺. Increasing the Er³⁺ concentration enhances the total UC PL intensity, with a disproportionate increase in red emission, attributed to concentration-dependent cross-relaxation processes that populate the ⁴I_13/2 level, followed by excited state absorption. Co-doping HfO₂:Er³⁺ with Yb³⁺ results in a significant enhancement of UC PL intensity, up to 30 times at the optimal Yb₂O₃ concentration of 1 g/L in the electrolyte. This enhancement is due to efficient energy transfer from the Yb³⁺ sensitizer to the Er³⁺ activator. Furthermore, the Er³⁺ red emission is preferentially enhanced due to a phonon-assisted Er³⁺ to Yb³⁺ energy back-transfer process, which efficiently depopulates the green-emitting ⁴S_3/2 level and increases the population of the red-emitting ⁴F_9/2 level. Down-conversion (DC) PL excitation and emission spectra of HfO₂:Er³⁺ and HfO₂:Er³⁺/Yb³⁺ display sharp peaks corresponding to f–f transitions of Er³⁺, with intensities directly proportional to the Er³⁺ concentration. In HfO₂:Er³⁺/Yb³⁺, the DC PL intensity decreases as the Yb³⁺ concentration increases, particularly for the green emission. This reduction is attributed to energy transfer via cross-relaxation from excited Er³⁺ to Yb³⁺, which quenches the visible emission from Er³⁺.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117907"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080245","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":"Lanthanide-dependent clustering in Yb3+/Ln3+ co-doped CaF2 nanocrystals: Correlating spectroscopic signatures with DFT insights","authors":"Sangeetha Balabhadra ,&nbsp;Haoming Xu ,&nbsp;Jiajia Cai ,&nbsp;Chang-Kui Duan ,&nbsp;Michael F. Reid ,&nbsp;Jon-Paul R. Wells","doi":"10.1016/j.optmat.2026.117920","DOIUrl":"10.1016/j.optmat.2026.117920","url":null,"abstract":"<div><div>The formation of heterogeneous lanthanide-ion clusters in CaF<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> was investigated experimentally and computationally. CaF<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> nanoparticles co-doped with 20 mol% Yb<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> and 2 mol% Ln<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> (Ln<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> = Ce<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Pr<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Nd<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Sm<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Eu<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Gd<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Ho<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, Er<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, and Tm<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>) were synthesized via a hydrothermal method. The structural and morphological properties were characterized using powder X-ray diffraction, dynamic light scattering, and transmission electron microscopy techniques. High-resolution Fourier transform infra-red spectroscopy revealed the presence of Yb<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> isolated cubic centers and various cluster sites. The relative concentration of the clusters varied with the choice of the co-doping ion. Calculations based on density functional theory were used to estimate the formation energies and local coordination structures of different clusters. The calculations indicate that the neutral <span><math><msub><mrow><mi>C</mi></mrow><mrow><mn>4</mn><mi>v</mi></mrow></msub></math></span> aggregations containing Ln<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> tend to decrease across the lanthanide series, while the negatively charged derivatives of hexameric clusters are relatively constant. This variation matches the experimental results. This study advances understanding of the clustering mechanisms in lanthanide-doped CaF<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> nanoparticles and has implications for luminescence optimization in advanced nanomaterials.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117920"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080246","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":"Ultrahigh quantum yield in organic-inorganic hybrid metal halide perovskites: LED and X-ray imaging applications","authors":"Junheng Yuan,&nbsp;Dedan Mu,&nbsp;Ziyi Zhang,&nbsp;Hao Song,&nbsp;Linglu Kuang,&nbsp;Bin Meng,&nbsp;Xu Tian,&nbsp;Jie Yu","doi":"10.1016/j.optmat.2026.117896","DOIUrl":"10.1016/j.optmat.2026.117896","url":null,"abstract":"<div><div>Organic-inorganic hybrid metal halide perovskites (OIMHPs) are emerging as next-generation optoelectronic materials, exhibiting superior luminescence and scintillation properties that make them highly suitable for light-emitting diodes (LEDs) and X-ray detection. To fully realize their potential, the development of OIMHPs with superior quantum efficiency and enhanced optical performance remains a significant obstacle. Herein, we report the successful synthesis of a (C₂₅H₂₂P)₂MnBr₄ perovskite by employing benzyl triphenyl phosphorus bromide ([C₂₅H₂₂P]⁺) as the organic A-site cation. The synthesized material demonstrates an exceptional near-unity photoluminescence quantum yield (PLQY) of 92 % under 465 nm excitation, which is attributed to the strategic isolation of [MnBr₄]^2- units through the incorporation of sterically demanding organic groups at the A-site. This structural engineering strategy effectively reduces non-radiative transitions between Mn²⁺ ions, thereby substantially improving luminous efficiency. The resulting perovskite exhibits remarkable thermal stability, superior photoluminescence characteristics, and excellent scintillation performance, making it an ideal candidate for fabricating high-color-purity LEDs and high-efficiency scintillation screens. Furthermore, the material's low toxicity, cost-effective synthesis route, and straightforward preparation process position it as a highly promising candidate for a wide range of advanced optical applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117896"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080206","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}