Advanced Optical Materials最新文献

{"title":"Intrinsically Stretchable Ortho-Steric Engineered MR-TADF Polymers With in Situ Hypercrosslinking for Narrowband Deep-Blue OLEDs","authors":"Hai Zhou,&nbsp;Xinxin Ban,&nbsp;Xiaoyue Wang,&nbsp;Tao Xu,&nbsp;Youqiang Qian,&nbsp;Shilong Feng,&nbsp;Jingxian Qiu,&nbsp;Zhaoxiang Han,&nbsp;Zekai Wu,&nbsp;Youdong Sun,&nbsp;Jiangqi Jiang,&nbsp;Wenli Shi,&nbsp;Kaiyong Sun,&nbsp;Aiyun Zhu","doi":"10.1002/adom.71967","DOIUrl":"https://doi.org/10.1002/adom.71967","url":null,"abstract":"<div>\u0000 \u0000 <p>Intrinsically stretchable organic light-emitting diodes (OLEDs) are the core building blocks for next-generation wearable electronics and flexible ultra-high-definition (UHD) displays. However, intrinsically stretchable deep-blue polymers with narrowband emission and ultra-high color purity (CIE y &lt; 0.1) have remained an unmet challenge. Herein, we propose an in situ free-radical hypercrosslinking strategy to construct multiple-resonance thermally activated delayed fluorescence (MR-TADF) crosslinked polymers that simultaneously achieve narrowband deep-blue emission and intrinsic stretchability. Using a carbonyl-nitrogen fused ring (QAO) MR framework as the emissive core, we employ ortho/para-styrene substitution steric engineering to modulate excited-state properties and exciton dynamics. Combined with in situ copolymerization with acrylic polyurethane, a three-dimensional elastic network is formed, enabling synergistic optimization of optoelectronic and mechanical performance. The ortho-substitution exhibits deep-blue emission at 424 nm with a full-width at half-maximum (FWHM) of only 34 nm, a photoluminescence quantum yield (PLQY) of 79%, and a maximum external quantum efficiency (EQE) of 13.3%. The flexible OLED based on hypercrosslinked polymer oQAOPU20 shows an electroluminescence peak at 440 nm with an FWHM of 42 nm, CIE coordinates of (0.151, 0.072) (CIE y &lt; 0.1), which represents the first reported narrowband deep-blue MR-TADF polymer with intrinsic stretchability, and enables flexible OLEDs with stable emission under mechanical deformation.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and Theoretical Investigation of Eu3+-Doped LiTaGeO5 Red Emitting Phosphors for Solid-State Lighting","authors":"Keyi Li,&nbsp;Caixia Dong,&nbsp;Jiaxuan Zhang,&nbsp;Jucai Yang,&nbsp;Hong Li,&nbsp;Zhaofeng Yang","doi":"10.1002/adom.71956","DOIUrl":"https://doi.org/10.1002/adom.71956","url":null,"abstract":"<div>\u0000 \u0000 <p>Developing efficient and thermally stable red phosphors is important for high-performance phosphor-converted white light-emitting diodes. Herein, Eu³⁺-activated LiTaGeO₅ phosphors were synthesized by a solid-state reaction and systematically investigated through combined experimental and theoretical approaches. Rietveld refinement and first-principles calculations suggest that Eu³⁺ preferentially occupies the Li site, while electronic structure calculations reveal localized Eu 4<i>f</i> states without substantially altering the host framework. Under 394 nm excitation, LiTaGeO₅:Eu³⁺ exhibits intense red emission at 611 (⁵D₀ → ⁷F₂) together with pronounced deep-red emission near 704 nm (⁵D₀ → ⁷F₄). The optimized LiTaGeO₅:0.033Eu³⁺ phosphor shows a photoluminescence quantum yield of 51.06% and retains approximately 86% of its initial emission intensity at 423 K, and has a thermal-quenching activation energy of about 0.52 eV. A NUV-pumped WLED achieves a CRI of 91 and a CCT of 4500 K. Transmission imaging, fluorescent anti-counterfeiting, infrared thermography, and COMSOL simulations further demonstrate its potential for solid-state lighting and optical applications.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constructing Efficient Narrow-Spectrum Circularly Polarized Organic Light-Emitting Diodes with Near-Ultraviolet Chiral Assistant Dopants","authors":"Jiajie Zeng,&nbsp;Ruiqi Sun,&nbsp;Tingxuan Guo,&nbsp;Fangfang Luo,&nbsp;Guoxia Hao,&nbsp;Xing Wu,&nbsp;Letian Xu,&nbsp;Ben Zhong Tang,&nbsp;Zujin Zhao","doi":"10.1002/adom.71961","DOIUrl":"https://doi.org/10.1002/adom.71961","url":null,"abstract":"<div>\u0000 \u0000 <p>Ultraviolet (UV) and near-ultraviolet (NUV) chiral materials are viable candidates as assistant dopants for constructing narrow-spectrum circularly polarized organic light-emitting diodes (CP-OLEDs), which can be applied in next-generation three-dimensional displays. However, UV/NUV materials that fully satisfy the stringent requirements for chiral assistant dopants remain scarce. Herein, a pair of enantiomers, (<i>S</i>)/(<i>R</i>)-OBNPCN-SFIAC, were designed, synthesized and characterized, which exhibit efficient NUV circularly polarized luminescence (CPL) with high-level reverse intersystem crossing (hRISC) properties. They function efficiently as emitters in non-doped and doped CP-OLEDs, providing maximum external quantum efficiencies (<i>EQE</i>_maxs) of 6.72% and 7.47%, respectively, along with absolute electroluminescence dissymmetry factors (|<i>g</i>_EL|s) of up to 7.35 × 10⁻³. Also, they can serve as assistant dopants in narrow-spectrum blue, green and orange multi-resonance thermally activated delayed fluorescence (MR-TADF) OLEDs, furnishing impressive <i>EQE</i>_maxs and |<i>g</i>_EL|s of 38.65% and 8.67 × 10⁻³, respectively. To the best of our knowledge, the above results are amongst the best of the reported narrow-spectrum CP-OLEDs so far.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic Exciton‒Color Center Switching and Multicolor/Dark Luminescence in Cs3Cu2Cl5 for Multilevel Sensing","authors":"Ruonan Miao,&nbsp;Wenjie Liu,&nbsp;Jiyang Fan","doi":"10.1002/adom.71963","DOIUrl":"https://doi.org/10.1002/adom.71963","url":null,"abstract":"<div>\u0000 \u0000 <p>Lead-free perovskite-like copper-halide compounds are emerging as promising candidates for next-generation optoelectronics, but the mechanisms underlying their dynamic photophysical responses to ambient stimuli remain elusive. Here, we demonstrate that Cs₃Cu₂Cl₅ microplatelets exhibit reversible, environment-controlled switching between distinct luminescence mechanisms and emission states, spanning green, blue, and non-emissive (dark) phases. Upon heating to 500 K, Cs₃Cu₂Cl₅ undergoes a phase transition from a 1D <i>Cmcm</i> structure that exhibits robust green emission via self-trapped excitons to a 0D <i>Pnma</i> phase with suppressed photoluminescence, forming a reversible dark state. In humid conditions, ion migration drives a phase transformation to Cu-doped CsCl, resulting in the emergence of blue emission (∼2.6 eV) from Cu⁺ color centers. This unique, ambient-triggered exciton-to-color center transition enables dynamic multicolor and dark-state luminescence switching in a single material platform. Our findings distinguish copper halides from their lead-based counterparts and suggest their significant potential for multilevel sensing, dynamic anti-counterfeiting, and other advanced optoelectronic applications.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Efficiency TADF-Sensitized WOLEDs With Suppressed Efficiency Roll-Off Enabled by an R-G-R Sandwich Architecture","authors":"Liang He,&nbsp;Jingting Luo,&nbsp;Xiaotong Wei,&nbsp;Weidong Sun,&nbsp;Danyang Zhang,&nbsp;Jingyu Wang,&nbsp;Xiaoyang Xia,&nbsp;Hao Wang,&nbsp;Yufu Sun,&nbsp;Haoran Yang,&nbsp;Guodong Sun,&nbsp;Weiqiang Liu,&nbsp;Liang Zhou","doi":"10.1002/adom.71905","DOIUrl":"https://doi.org/10.1002/adom.71905","url":null,"abstract":"<div>\u0000 \u0000 <p>Achieving white organic light-emitting diodes (WOLEDs) that simultaneously deliver high efficiency, stable chromaticity, and suppressed efficiency roll-off remains challenging. Here, we propose an exciton-management strategy by using DBA-DI as both a blue emitter and energy-transfer relay in a TCTA:26DCzPPy mixed host, enabling energy-transfer to PQ₂Ir(dpm) and Ir(mppy)₃. An R-G-R sandwich emitting layer (EML) spatially redistributes the red and green emission channels, mitigating green-dominated spectral imbalance and improving red-channel exciton capture. Finally, the optimized device exhibits a turn-on voltage of 2.7 V, maximum current efficiency (CE) of 58.43 cd A⁻¹, power efficiency (PE) of 64.53 lm W⁻¹, and external quantum efficiency (EQE) of 28.00%. At 1000 cd m⁻², the EQE remains 24.56%, corresponding to a 12.3% roll-off, with a color rendering index of 72.7. The optimized device also showed small CIE shifts of Δx = 0.025 and Δy = 0.001 over 1000–10 000 cd m⁻². Semi-quantitative analysis of spectral overlap, transient PL/EL dynamics, and single-carrier transport supports RISC-assisted energy transfer and balanced multichannel exciton management. This strategy provides a framework for synergistically regulating spatial EML architecture and TADF sensitizer concentration in high-performance WOLEDs.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low Reflectance all-Glass Metasurface Lenses Based on Laser Self-generated Nanoparticles","authors":"Jae Hyuck Yoo,&nbsp;Nathan J. Ray,&nbsp;Mike A. Johnson,&nbsp;Hoang T. Nguyen,&nbsp;Eyal Feigenbaum","doi":"10.1002/adom.71779","DOIUrl":"https://doi.org/10.1002/adom.71779","url":null,"abstract":"<div>\u0000 \u0000 <p>Optical metasurfaces, comprised of subwavelength nanostructures, hold a great promise to high-power laser optics but also a limited pertinence due to their currently limited aperture size, throughput and durability. Here, an alternative approach is presented, reliant on laser-controlled self-organizing mask formation followed by ion etching which results in an all-fused-silica-glass metasurface, for enhanced durability. Two 1 mm diameter optical elements (an axicon lens and a shadower) are fabricated and their optical performance is validated at 532 nm wavelength with an extremely low broadband reflection (&lt;0.15%)—a result of their elongated and tapered metasurface elements shape. The self-organizing working principle enables producing large amounts of nano-elements at-once, thus a path for aperture scaleup. It also enables generation of sub-100 nm nanoelements, thus a path to short wavelengths operation. Two key advancements are presented: a laser scan with in situ mask transmission feedback enables patterning the etching mask to a prescribed nanoparticle distribution with a gradually varying mask structure, and a crafted beyond-mask-erosion-point etching of the mask enables increasing the metasurface phase difference to at least π, while keeping extremely low reflection across it.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adjoint-Designed Mosaic Optical Fourier Surfaces for Short-Distance Red-Green-Blue Color Mixing From Spatially Separated Emitters","authors":"Dongjae Baek,&nbsp;Heerin Noh,&nbsp;Seunghak Lee,&nbsp;Jaewon Lee,&nbsp;Seungwoo Lee","doi":"10.1002/adom.71966","DOIUrl":"https://doi.org/10.1002/adom.71966","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;Short-distance color mixing from spatially separated red, green, and blue (RGB) emitters is challenging in compact display optics. Here, we demonstrate an adjoint-designed, fabrication-constrained mosaic optical Fourier surface (OFS) for RGB homogenization at a 5 mm observation distance. A 3 mm &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mo&gt;×&lt;/mo&gt;\u0000 &lt;annotation&gt;$times$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; 3 mm aperture comprises 225 sinusoidal tiles with independently optimized period, orientation, and depth. The numerical demonstration uses a publicly documented 3030 RGB package as a reproducible separated-emitter proxy for compact micro-LED backlight applications, rather than a sub-100-&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$umu{rm m}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; pixel. A differentiable finite-source model is followed by direct full-vector rigorous coupled-wave analysis (RCWA) of 102,756 local conditions. The optimized OFS reduces &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;p&lt;/mi&gt;\u0000 &lt;mn&gt;95&lt;/mn&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;u&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;v&lt;/mi&gt;\u0000 &lt;mo&gt;′&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$p95(Delta u^{prime }v^{prime })$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; from 0.03039 to 0.01429. Replacing 13,766 kernels from 30 high-risk tiles with ultrafine RCWA or independent finite-difference time-domain results gives 0.014293 and 0.014266, with 99.95% and 99.74% dominant-order agreement. Complementary reduced-supercell RCWA and full-size two-tile FDTD checks directly bound inter-tile coupling, while first-order fabrication and material perturbations remain below &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;mi&gt;p&lt;/mi&gt;\u0000 &lt;mn&gt;95&lt;/mn&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mn&gt;0.01511&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$mp95=0.01511$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. The validated library spans 0.90–5.80 &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$umu{rm m}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; periods, 0–350 nm depths, and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;d&lt;/mi&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;mi&gt;Λ&lt;/mi&gt;\u0000 &lt;mo&gt;≤&lt;/mo&gt;\u0000 &lt;mn&gt;0.35&lt;/mn&gt;\u0000 &lt;/mro","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Basis-Independent Geometric Phase Modulation in Circularly Birefringent Plasmonic Structures","authors":"Pasha Goz,&nbsp;Akash Das,&nbsp;Andre Yaroshevsky,&nbsp;Yuri Gorodetski","doi":"10.1002/adom.71959","DOIUrl":"https://doi.org/10.1002/adom.71959","url":null,"abstract":"<p>Geometric phase in metasurfaces is conventionally realized using spatially rotated linearly birefringent meta–atoms under circularly polarized illumination. Here we demonstrate that a geometric phase modulation can be achieved through circular birefringence and observed under linear polarization excitation. We introduce a plasmonic metasurface composed of spatially rotated chiral spiral unit cells designed to produce space-variant circular retardance. This generates a geometric phase ramp equivalent to a blazed grating, leading to <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>±</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 <annotation>$pm 1$</annotation>\u0000 </semantics></math> diffraction orders in momentum space. Using leakage radiation microscopy, we directly resolve these orders and show how their intensities depend upon the input linear polarization confirming the geometric origin of the phase. We theoretically analyze the phenomenon using a rotated Poincaré space and confirm our results by direct Stokes parameters measurement. These results establish basis-independent approach to geometric phase accumulation in circularly birefringent plasmonic metasurfaces.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.71959","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulating the Order–Disorder Phase Controlling in K2RbInCl6 Single Crystal Toward the Highly Efficient Luminescence","authors":"Mosheng Cai,&nbsp;Qinglin Meng,&nbsp;Ziqiao Wu,&nbsp;Panheng Wang,&nbsp;Xiaoming Zhang,&nbsp;Chengjing Huang,&nbsp;Jiandong Fan,&nbsp;Wenzhe Li","doi":"10.1002/adom.71955","DOIUrl":"https://doi.org/10.1002/adom.71955","url":null,"abstract":"<div>\u0000 \u0000 <p>Indium halide inorganic perovskite has attracted widespread attention due to its high photoluminescence efficiency and wide-spectrum luminescence. The ordered arrangement characteristics of A-site bimetallic ions, K⁺ and Rb⁺, have a significant impact on 0D K₂RbInCl₆ perovskite luminescence properties but have not been explored. Here, we report a crystallization-kinetics-modulated ordered structure of 0D K₂RbInCl₆ perovskite. By regulating the crystallization rate and temperature, a series of single crystals with adjustable ordered arrangements were obtained, enabling high photoluminescence performance. The single-crystal structure shows that the ordered arrangements of the A-site cation are layered along the (100) direction. The ordered single crystal exhibits a significantly higher PLQY (∼100%) than the disordered counterpart. The electronic structure calculations were performed to elucidate the luminescence mechanism. These results demonstrate that the A-site ordered property provides an effective structural handle for tuning excited-state behavior in 0D halide perovskites and offers new guidance for the design of efficient luminescent halide materials.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antireflection Mechanism and Reflectance Optimization Modeling of Three-Level Hierarchical Micro-Nano Structures","authors":"Xuefei Liu,&nbsp;Chuanzhen Huang,&nbsp;Hanlian Liu,&nbsp;Dun Liu,&nbsp;Dongkai Chu,&nbsp;Peng Yao,&nbsp;Bin Zou,&nbsp;Hongtao Zhu,&nbsp;Zhen Wang,&nbsp;Longhua Xu,&nbsp;Shuiquan Huang","doi":"10.1002/adom.71969","DOIUrl":"https://doi.org/10.1002/adom.71969","url":null,"abstract":"<div>\u0000 \u0000 <p>Although laser‑processed hierarchical micro‑nano structures hold great potential for silicon antireflection, it remains difficult to quantitatively correlate complex multi‑scale morphological features with optical response. This work addresses this bottleneck by developing a multi-scale semi-analytical reflectance model. Utilizing three-level micro-nano structures reported in our prior study, which were fabricated by our two-step nanosecond laser-assisted waterjet and femtosecond laser processing, we reveal the respective antireflection mechanisms of each structural level. The microscale V-grooves provide a light-trapping effect; laser-induced periodic surface structures (LIPSS) promote light absorption via multi-order grating diffraction inside the silicon substrate while resulting in negligible non-zero-order reflection toward air; and random nanoparticles mitigate the abrupt change in interfacial refractive index via the effective medium effect. Integrating ray tracing, grating diffraction, effective medium layer thin-film interference and nanoparticle scattering, the proposed model predicts that structure reflectance drops with rising V-groove aspect ratio while being nearly insensitive to groove width. The model establishes a quantitative relationship between hierarchical structural parameters and reflectance, enabling parameter-guided design of laser-textured silicon antireflection surfaces. Experimental validation confirms the predictive capability of the model, with the optimized structure achieving a minimum reflectance of 4.5% within 300–1000 nm.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 41","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}