Advanced Optical Materials最新文献

{"title":"Deterministic Transferable Planar Dielectric Mirrors for Investigating Strong Light–Matter Coupling","authors":"Atanu Patra,&nbsp;Subhamoy Sahoo,&nbsp;Johannes Düreth,&nbsp;Simon Betzold,&nbsp;Sven Höfling","doi":"10.1002/adom.71548","DOIUrl":"https://doi.org/10.1002/adom.71548","url":null,"abstract":"<p>Optical cavities play a central role in photonic and quantum technologies by enhancing light-matter interactions. In semiconductor microcavities, achieving high quality (Q) factors typically relies on sophisticated epitaxial growth techniques, such as molecular beam epitaxy, which offer atomic-scale precision but are costly and limited in material compatibility. For dielectric microcavities, high Q factors can be achieved using dielectric Bragg mirrors. However, conventional deposition techniques for the top mirrors, such as plasma-enhanced chemical vapor deposition or sputtering, can damage embedded emitters. This limitation is particularly severe for van der Waals materials, especially atomically thin semiconductors. Moreover, the conventional top-mirror deposition can cover or degrade predefined metal contacts. Recovering electrical access typically requires additional lithography and etching steps. Here, a deterministic dry-transfer approach is developed to fabricate complete dielectric microcavities using both top and bottom <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>SiO</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>${rm SiO}_{2}$</annotation>\u0000 </semantics></math>/<span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>TiO</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>${rm TiO}_{2}$</annotation>\u0000 </semantics></math> Bragg mirrors without post-growth lift-off processes, reaching a Q factor <span></span><math>\u0000 <semantics>\u0000 <mo>∼</mo>\u0000 <annotation>$sim$</annotation>\u0000 </semantics></math> 4<span></span><math>\u0000 <semantics>\u0000 <mo>×</mo>\u0000 <annotation>$times$</annotation>\u0000 </semantics></math>10<span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mn>3</mn>\u0000 </msup>\u0000 <annotation>$^{3}$</annotation>\u0000 </semantics></math>. Using a <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>WS</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>${rm WS}_{2}$</annotation>\u0000 </semantics></math> monolayer as the active medium, clear signatures of strong exciton-photon coupling are observed at both room temperature and cryogenic temperatures. These results demonstrate an efficient cavity fabrication approach that preserves the integrity of the emitter of layered materials, enabling next generation integrated photonic devices.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.71548","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205221","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":"Chalcogen Alloy-Engineered Te2Se/Si Heterojunctions for Low-Noise Complementary Metal-Oxide Semiconductor-Compatible Short-Wave Infrared Imaging","authors":"Byeongjin Park,&nbsp;Sieun Yun,&nbsp;Seock-Jin Jeong,&nbsp;Euiyoung Choi,&nbsp;Min Cheol Kim,&nbsp;Jun Woo Kim,&nbsp;Seongmo Kang,&nbsp;Jiwoo Kim,&nbsp;Jongwon Yoon,&nbsp;Jaejun Jo,&nbsp;Hyun-Soo Ra,&nbsp;Soon-Yong Kwon,&nbsp;Han Seul Kim,&nbsp;Yonghun Kim","doi":"10.1002/adom.71829","DOIUrl":"https://doi.org/10.1002/adom.71829","url":null,"abstract":"<p>Developing complementary metal-oxide semiconductor (CMOS)-compatible and scalable short-wave infrared (SWIR) photodetectors remains challenging owing to the high costs and integration limits of conventional indium gallium arsenide and mercury cadmium telluride technologies. Here, we report a chalcogen alloy design strategy for Te₂Se/Si heterojunction photodetectors using atomistic simulations to suppress oxygen-related trap formation. CMOS-compatible Te₂Se/n-Si photodetectors fabricated by radio-frequency magnetron co-sputtering exhibit superior performance compared with Te/n-Si counterparts. Structural and optical analyses confirm Se-induced bandgap widening to 0.62 eV and reduced carrier concentration (∼10¹⁷ cm⁻³), resulting in a rectification ratio of approximately 4.0 × 10⁶, a two-orders-of-magnitude reduction in reverse dark current, and an extended SWIR photoresponse. The Te₂Se/n-Si photodetector also exhibits over three orders of magnitude lower current noise density, a specific detectivity of approximately 4.49 × 10¹⁰ Jones at 1300 nm, and a sub-millisecond photoresponse. Finally, a PCB-integrated 14 × 14 imaging array demonstrates high-contrast SWIR imaging, highlighting the potential of Te₂Se/Si heterojunctions as a CMOS-compatible, scalable, and low-noise SWIR photodetection platform.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.71829","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205436","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":"Engineering Light–Matter Interaction for Scalable Nanophotonic Technologies","authors":"Aditya Dileep Kurdekar,&nbsp;Dharmaraj R.,&nbsp;Venkataramaniah Kamisetti","doi":"10.1002/adom.71837","DOIUrl":"https://doi.org/10.1002/adom.71837","url":null,"abstract":"<div>\u0000 \u0000 <p>Nanoscale light–matter interactions sit at the intersection of quantum electrodynamics and next-generation technology. When electromagnetic fields are confined to volumes far below the classical diffraction limit, through different nanomaterial systems, the rules governing photon-matter coupling are fundamentally altered. We observe that spontaneous emission rates are accelerated by orders of magnitude, optical nonlinearities become accessible at single-photon power levels, and quantum coherence is sustained under conditions that would otherwise prevent it in conventional bulk systems. This Perspective argues that the field is approaching a critical inflection point. The underlying physics has come to a stage where meaningful technological translation is now possible, while advances in nanofabrication have reached a level of precision and reproducibility compatible with scalable device engineering. At the same time, pressing challenges in healthcare, energy, and information technologies are creating both the demand and the context for such translation. Drawing on recent progress in plasmonic, polaritonic, and moiré nanophotonic systems, this perspective outlines a structured, multi-stage technology roadmap and examines the key scientific and engineering bottlenecks that must be addressed to achieve it. It concludes by identifying the directions most likely to benefit from continued, coordinated effort over the next two decades.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206123","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-Speed and Continuously Tunable Polarization Rotator Using High-Tilt Electrically Suppressed Helix Ferroelectric Liquid Crystals","authors":"Ming Cheng,&nbsp;Vigneshwaran Swaminathan,&nbsp;Valerii Vaschenko,&nbsp;Olena Vashchenko,&nbsp;Xinyi Yu,&nbsp;Ting Zhao,&nbsp;Yan Jun Liu,&nbsp;Abhishek Kumar Srivastava","doi":"10.1002/adom.71703","DOIUrl":"https://doi.org/10.1002/adom.71703","url":null,"abstract":"<div>\u0000 \u0000 <p>The dynamic control of light polarization is crucial for advancing optical and photonic technologies; however, existing polarization rotators often face a performance trade-off among speed, precision, power efficiency, and system complexity. Liquid crystal-based solutions, while advantageous in cost and integrability, are typically limited by millisecond-scale response times. In this work, we overcome these limitations by introducing a high-performance polarization rotator based on a high-tilt electrically suppressed helix ferroelectric liquid crystal (HT-ESHFLC). The device features a simple single-cell structure yet achieves continuous polarization rotation with a high degree of polarization (&gt;97%), a wide tuning range (82°), microsecond-scale switching, and ultra-low power consumption. This performance is attributed to our tailored FLC material with chiral sematic C phase, which exhibits a long pitch, high tilt angle, and large spontaneous polarization. These properties collectively overcome the longstanding challenge of stable phase modulation in conventional deformed-helix FLC (DHFLC) and in binary working principles of ESHFLC devices. We delineate the design strategy, tracing the evolution from nematic and conventional DHFLCs to our novel HT-ESHFLC platform. To demonstrate its practical utility, we integrated the rotator with a Pancharatnam-Berry lens to construct a dynamic augmented reality display capable of rapid intensity modulation between two planes. This work establishes the HT-ESHFLC as a compelling platform for high-speed, low-power polarization modulation, with promising applications in optical communications, LiDAR, and next-generation displays.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206129","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":"An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self-Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions","authors":"Inna A. Ivashchenko,&nbsp;Alicja Szymska-Szymanik,&nbsp;Lubomir D. Gulay,&nbsp;Alexander Eich,&nbsp;Galina Gurieva,&nbsp;Susan Schorr,&nbsp;Karina V. Lamonova,&nbsp;Marcin Nyk,&nbsp;Malgorzata Makowska-Janusik,&nbsp;Benjamin González-Diaze,&nbsp;Katarzyna Matras-Postołek","doi":"10.1002/adom.71826","DOIUrl":"https://doi.org/10.1002/adom.71826","url":null,"abstract":"<p>This work introduces a novel explanation of the visible (Vis-) and near-infrared (NIR) Cs₂NaInCl₆ luminescence based on spontaneously formed In³⁺→In⁺ and a doping method by utilizing Er³⁺/Yb³⁺ and Sb³⁺ ions. A combined experimental and theoretical approach has been used to investigate the characteristics of the microcrystals, synthesized through precipitation and hydrothermal techniques. These yielded cubic, Sp.Gr. <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>F</mi>\u0000 <mi>m</mi>\u0000 <mover>\u0000 <mn>3</mn>\u0000 <mo>¯</mo>\u0000 </mover>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 <annotation>$Fmbar{3}m$</annotation>\u0000 </semantics></math>, or tetragonal structure, Sp.Gr. <i>I</i>4/<i>mmm</i>, depending on the dopants. In⁺ (5<i>s</i>²) has provoked wide photoluminescence (PL) from ∼400–800 nm, and Sb³⁺ (5<i>s</i>²) incorporation has greatly enhanced PL at 450 nm. While Er³⁺ doping has enabled intense NIR emission (∼1540 nm), Yb³⁺ sensitization not only improves Er³⁺ PL in the 520–550 nm range (green light) but also adds a band at 980 nm. For Er-doped, RE/Sb-codoped Cs₂NaInCl₆, it is possible to observe not only downconversion but also upconversion (UC) emissions in the 520–550 nm range. DFT calculations have elucidated the dopant and vacancy effects on the band structure and luminescence behavior of the samples. Stable and simple in preparation phosphor-converted LED prototypes have been constructed and characterized in the Vis- to NIR ranges.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.71826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206180","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":"Electronic Dimensionality Control of Exciton Localization in Lead-Free Copper Halide Perovskite Derivatives for Full-Color, High-Fidelity, and Circadian-Tunable White-Light Emission","authors":"Yanmei Chen,&nbsp;Hongyang Zhu,&nbsp;Yi Wang,&nbsp;Peifen Zhu","doi":"10.1002/adom.71834","DOIUrl":"https://doi.org/10.1002/adom.71834","url":null,"abstract":"<div>\u0000 \u0000 <p>Rare-earth-free white light–emitting diodes (WLEDs) require emissive materials that simultaneously deliver high photoluminescence efficiency, spectral complementarity, and environmental stability. Here, an electronic-dimensionality-guided design strategy is reported for lead-free copper halide perovskite derivatives, in which emission color is set by Cu–halide connectivity and not by dopant chemistry, giving a predictive rule that spans both 0D and 1D frameworks. 0D Cs₃Cu₂I₅ and 1D CsCu₂X₃ (X═Cl, I) are synthesized via solution and low-temperature solid-state routes, producing blue, green, and yellow emissions with photoluminescence quantum yields up to ≈100%. Despite comparable bandgaps, distinct emission colors originate from dimensionality- and halide-dependent self-trapped exciton relaxation. By integrating these complementary emitters, WLEDs with a color rendering index of 96.6, a color quality scale of 98, and widely tunable correlated color temperatures (CCTs) are achieved by employing an ultrafast imprinting technique. The wide CCT tunability simultaneously enables human-centric lighting functionality, with the circadian action factor (CAF) tunable from 0.489 (evening-friendly) to 1.184 (daytime-alerting) and high color fidelity indices (CFI 91.0–95.8) across the full range, establishing this platform for circadian-supportive solid-state lighting.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205978","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":"Generating Electrically-Tunable, Polarization-Dependent, Highly-Efficient Optical Vortices Based on Phase-Separated Liquid Crystal-Polymer Blazed Fork Gratings","authors":"Rubiao Liang,&nbsp;Silin Yuan,&nbsp;Zixuan Wu,&nbsp;Ting Zhao,&nbsp;Zongyuan Tang,&nbsp;Delai Kong,&nbsp;Xueqian Zhao,&nbsp;Ahmed Elbanna,&nbsp;Yan Jun Liu","doi":"10.1002/adom.71823","DOIUrl":"https://doi.org/10.1002/adom.71823","url":null,"abstract":"<div>\u0000 \u0000 <p>Conventionally, the fabrication processes for optical vortex (OV) modulators are cumbersome and costly. In this work, we propose a simple method to generate high-efficiency vortex beams using the phase-separated liquid crystal (LC)-polymer blazed fork gratings, which are prepared by single-step photopolymerization-induced phase separation (PIPS). By designing the photomask patterns to create specific light fields, which further induce the photopolymerization of monomers in specific regions within a LC cell infiltrated with a mixture of LCs and prepolymer, the designed phase-separated LC-polymer blazed fork gratings within the LC cell will be finally formed. Based on the electrically-tunable and polarization-dependent phase compensation of LCs, the prepared fork gratings can have a high single-order diffraction efficiency of 60% (i.e., conversion efficiency for OVs). Compared with previous methods, the proposed approach for OV beam generation offers several advantages, including high efficiency, simple fabrication, and low cost.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205979","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":"Colloidal Nanocrystals Regrowth-Assisted Synthesis of Perovskite Microwire Lasers For Integrated Optoelectronics","authors":"Elizaveta V. Sapozhnikova,&nbsp;Ivan A. Matchenya,&nbsp;Dmitry A. Tatarinov,&nbsp;Grigorii A. Verkhogliadov,&nbsp;Dmitry A. Semyonov,&nbsp;Maria A. Kirsanova,&nbsp;Natalia K. Kuzmenko,&nbsp;Julia S. Mironova,&nbsp;Arina O. Kalganova,&nbsp;Valeriya M. Levkovskaya,&nbsp;Stepan A. Baryshev,&nbsp;Yuxi Tian,&nbsp;Anatoly P. Pushkarev","doi":"10.1002/adom.71822","DOIUrl":"https://doi.org/10.1002/adom.71822","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;Colloidal perovskite nanocrystals (NCs) are a well-proven platform for growing anisotropic structures. Nanowires (NWs) exhibiting a quantum confinement phenomenon and microwires (MWs), which enable lasing, are of particular interest for optoelectronic devices. Synthesis of the latter is challenging. Herein, we report a straightforward access to high-quality &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;CsPbBr&lt;/mi&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${rm CsPbBr}_3$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; MW lasers. We utilize a diphenyl ether (DPE) solvent for the hot-injection synthesis. DPE coordinates strongly to &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;Pb&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;annotation&gt;${rm Pb}^{2+}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and allows to reduce an excess of oleic acid/oleylamine ligand pair, well-established for &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;PbBr&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${rm PbBr}_2$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; dissolution and inhibition of as-formed NCs regrowth. Therefore, a rapid injection of Cs-oleate into the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;PbBr&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${rm PbBr}_2$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;-containing solution yields lead-depleted &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;Cs&lt;/mi&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;PbBr&lt;/mi&gt;\u0000 &lt;mn&gt;6&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;${rm Cs}_4{rm PbBr}_6$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; NCs, which gradually convert into &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;CsPbBr&lt;/mi&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${rm CsPbBr}_3$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; counterparts. The latter transform into NWs through an oriented-attachment mechanism, which in turn evolve into laser MWs. To demonstrate spectrally tunable lasing in MWs we employ &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;YCl&lt;/mi&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${rm YCl}_3$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; for ion exchange in the perovskite lattice. Resultant CsPb(Cl,Br)&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 ","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206124","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":"Volatile Additive-Mediated Crystallization Modulation of CsPbI2Br Perovskite Films for Efficient and Stable Solar Cells","authors":"Weilin Zhang,&nbsp;Jingfei Wang,&nbsp;Cheng Lu,&nbsp;Shuaiyang Du,&nbsp;Tangyue Xue,&nbsp;Qing Guo,&nbsp;Tingting Dai,&nbsp;Erjun Zhou,&nbsp;Jing Chen,&nbsp;Meng Wei,&nbsp;Xunwen Xiao,&nbsp;Qiang Guo","doi":"10.1002/adom.71790","DOIUrl":"https://doi.org/10.1002/adom.71790","url":null,"abstract":"<div>\u0000 \u0000 <p>All-inorganic CsPbI₂Br perovskite is a promising absorber for efficient solar cells due to its excellent thermal stability and suitable bandgap. However, uncontrolled crystallization during solution processing often leads to high defect densities and severe non-radiative recombination, limiting device performance. Here, we introduce a volatile additive-mediated crystallization modulation strategy, where a low-concentration dimethylammonium iodide (DMAI) or dimethylammonium bromide (DMABr) solution is spin-coated onto the wet CsPbI₂Br film after a low-temperature annealing step (60°C), followed by a second annealing at 250°C. This intermediate-stage treatment promotes heterogeneous nucleation and effectively regulates the crystallization process. The resulting films exhibit enlarged grains, smoother surfaces, and reduced defect densities. Consequently, DMAI- and DMABr-treated CsPbI₂Br perovskite solar cells (PSCs) achieve champion power conversion efficiencies (PCEs) of 18.15% and 17.33%, respectively, significantly outperforming the control device (15.29%). Moreover, the DMAI- and DMABr-treated devices also exhibit excellent stability, maintaining over 96% and ∼80% of their initial PCE, respectively, after continuous aging for 1000 h under environmental conditions (relative humidity &lt; 10%) and in a nitrogen atmosphere at 60°C.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206181","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":"Metal-Free 1D MPAZE-N2H5I3 Perovskite for X-Ray Detection With Enhanced Stability and Sensitivity","authors":"Qing Zhou,&nbsp;Shenghuan Shi,&nbsp;Yuhao Kuang,&nbsp;Jiawen Cheng,&nbsp;Youkui Xu,&nbsp;Zhizai Li,&nbsp;Zhenhua Li,&nbsp;Zhiwen Jin","doi":"10.1002/adom.71827","DOIUrl":"https://doi.org/10.1002/adom.71827","url":null,"abstract":"<div>\u0000 \u0000 <p>Metal-free halide perovskites (MFPs) hold promise for x-ray detection due to their eco-friendliness and tunable optoelectronic properties. However, their practical applications are limited by challenges such as insufficient structural stability, inefficient charge transport, and suboptimal detection sensitivity, which restrict their competitiveness against traditional metal-based detectors. Here, we report the design, synthesis, and characterization of MPAZE-N₂H₅I₃, a novel MFP single crystal optimized via A-site cation engineering to enhance structural stability and charge transport properties. The crystal exhibits a high resistivity of 1.28 × 10¹³ Ω·cm and a low limit of detection (LoD) of 0.109 µGy_air⁻¹ at 10 V bias (minimum LoD), achieving an x-ray imaging sensitivity of 2053 µC·Gy_air⁻¹·cm⁻² at 20 V bias. These results validate its potential for next-generation eco-friendly x-ray detection technologies.</p>\u0000 </div>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"14 38","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149206219","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}