ACS Applied Optical Materials最新文献

{"title":"Correction to “1.65 eV p-AlGaAs/n-GaAs QW/n-AlGaAs Tunnel Junctions with Delta-Doping for Monolithic III–V/Si Tandem Solar Cells”","authors":"May Angelu Madarang, Rafael Jumar Chu, Yeonhwa Kim, Eunkyo Ju, Tsimafei Laryn, Quang Nhat Dang Lung, Jae-Hoon Han, Won Jun Choi and Daehwan Jung*, ","doi":"10.1021/acsaom.4c0047210.1021/acsaom.4c00472","DOIUrl":"https://doi.org/10.1021/acsaom.4c00472https://doi.org/10.1021/acsaom.4c00472","url":null,"abstract":"","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 12","pages":"2621 2621"},"PeriodicalIF":0.0,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143127686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Printed Twisted Thin Films with Near-Infrared Bandgaps and Tailored Chiroptical Properties.","authors":"Botyo Dimitrov, Daria Bukharina, Valeriia Poliukhova, Dhriti Nepal, Michael E McConney, Timothy J Bunning, Vladimir V Tsukruk","doi":"10.1021/acsaom.4c00386","DOIUrl":"10.1021/acsaom.4c00386","url":null,"abstract":"<p><p>In this work, twisted helical cellulose nanocrystals films with preprogrammed circular polarization and near-infrared reflectance are fabricated via a blade-based 3D printing method. The films are composed of stacked nanoscale slabs with high birefringence from unidirectionally organized cellulose nanocrystals. By changing the printing director, we achieved two types of films: twisted helical stacks and anisotropic Bragg stacks. These films are highly transparent and clear, and the achiral anisotropic Bragg stack shows near-infrared spectral region reflectance (1.3-1.4 μm). In contrast, the twisted helical films show concurrent left- and right-handed circularly polarized properties, as opposed to left-handed natural cellulose nanocrystals films. We observe dual chiroptical properties with circular dichroism peaks due to circular Bragg reflectance in the visible region and suggest that the circularly polarized properties are extended to the near-infrared region. These observations prompted us to explore the transition between anisotropic Bragg stacks and continuous helical films via simulations. We show that the printed twisted films can act as optical metamaterials with dual helicity and fill the gap between known photonic structures-the conventional continuous chiral nematic material with a chiroptical appearance and the achiral Bragg stack with a controlled photonic bandgap. These printed twisted stacked films hold the potential of larger-scale printed ordering of unique anisotropic nanostructures for circularly polarized-sensitive photonic, thermal, and energy management applications.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 12","pages":"2540-2550"},"PeriodicalIF":0.0,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11686506/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142915764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Printed Twisted Thin Films with Near-Infrared Bandgaps and Tailored Chiroptical Properties","authors":"Botyo Dimitrov,&nbsp;Daria Bukharina,&nbsp;Valeriia Poliukhova,&nbsp;Dhriti Nepal,&nbsp;Michael E. McConney,&nbsp;Timothy J. Bunning and Vladimir V. Tsukruk*,&nbsp;","doi":"10.1021/acsaom.4c0038610.1021/acsaom.4c00386","DOIUrl":"https://doi.org/10.1021/acsaom.4c00386https://doi.org/10.1021/acsaom.4c00386","url":null,"abstract":"<p >In this work, twisted helical cellulose nanocrystals films with preprogrammed circular polarization and near-infrared reflectance are fabricated via a blade-based 3D printing method. The films are composed of stacked nanoscale slabs with high birefringence from unidirectionally organized cellulose nanocrystals. By changing the printing director, we achieved two types of films: twisted helical stacks and anisotropic Bragg stacks. These films are highly transparent and clear, and the achiral anisotropic Bragg stack shows near-infrared spectral region reflectance (1.3–1.4 μm). In contrast, the twisted helical films show concurrent left- and right-handed circularly polarized properties, as opposed to left-handed natural cellulose nanocrystals films. We observe dual chiroptical properties with circular dichroism peaks due to circular Bragg reflectance in the visible region and suggest that the circularly polarized properties are extended to the near-infrared region. These observations prompted us to explore the transition between anisotropic Bragg stacks and continuous helical films via simulations. We show that the printed twisted films can act as optical metamaterials with dual helicity and fill the gap between known photonic structures─the conventional continuous chiral nematic material with a chiroptical appearance and the achiral Bragg stack with a controlled photonic bandgap. These printed twisted stacked films hold the potential of larger-scale printed ordering of unique anisotropic nanostructures for circularly polarized-sensitive photonic, thermal, and energy management applications.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 12","pages":"2540–2550 2540–2550"},"PeriodicalIF":0.0,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsaom.4c00386","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143127514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proving Monodispersed Core@Shell Model NaGdF4:Tb@NaGdF4:Ce by Redox Reaction","authors":"Ruchi Agrawal,&nbsp;Vishal Pandurang Bhandigare,&nbsp;Manas Srivastava,&nbsp;Avesh Kumar Tyagi* and Raghumani Singh Ningthoujam*,&nbsp;","doi":"10.1021/acsaom.4c0037910.1021/acsaom.4c00379","DOIUrl":"https://doi.org/10.1021/acsaom.4c00379https://doi.org/10.1021/acsaom.4c00379","url":null,"abstract":"<p >A series of Ce³⁺- and Tb³⁺-doped NaGdF₄ core and core@shell monodispersed nanoparticles (NPs), with different doping concentrations of Ce³⁺ and a fixed concentration of Tb³⁺ in a NaGdF₄ core (Ce (x = 1–20 at. %)–Tb (y = 5 at. %)) (C-CT-x) and core@shell NaGdF₄:20Ce@NaGdF₄:5Tb (CS-CT-20), NaGdF₄:5Tb@NaGdF₄:20Ce (CS-TC-20), and NaGdF₄:5Tb@NaGdF₄:50Ce (CS-TC-50) NPs have been prepared using the thermolysis method. Ce³⁺ shows an absorption peak at 250–260 nm. Gd³⁺ shows absorption peaks at 278 and 310 nm, and Tb³⁺ shows absorption peaks at 350 and 378 nm (main). The emission peak of Ce³⁺ is broad in the range of 320–400 nm. In the Ce–Tb system, there is an energy transfer from Ce³⁺ to Tb³⁺, and thus, a significant enhancement in luminescence intensity (488 and 545 nm) is observed. This is due to overlapping of the absorption peak of Tb³⁺ with the emission peak of Ce³⁺. The energy transfer from Ce³⁺ to Tb³⁺ is significantly improved in core@shell NPs, compared to core NPs. In order to prove the core@shell model, these NPs are further surface functionalized with SiO₂. All of the silica-coated samples are treated with KMnO₄/ascorbic acid. It is found that Ce³⁺ in the surface/shell is more exposed to KMnO₄/ascorbic acid, which proves the monodispersed core–shell model by the redox reaction.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 12","pages":"2528–2539 2528–2539"},"PeriodicalIF":0.0,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143127509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural Color from Multi-Bounce Reflection Interference in Metalized Microstructures","authors":"Malak S. Rayes,&nbsp;Nathaniel E. Sturniolo,&nbsp;Krista Hirsch,&nbsp;Caleb H. Meredith and Lauren D. Zarzar*,&nbsp;","doi":"10.1021/acsaom.4c0039210.1021/acsaom.4c00392","DOIUrl":"https://doi.org/10.1021/acsaom.4c00392https://doi.org/10.1021/acsaom.4c00392","url":null,"abstract":"<p >The development of materials and methods for controlling iridescent structural color arising from optical interference has attracted considerable attention for a variety of applications ranging from anticounterfeiting to displays. Here, we investigate high-reflectivity structural color generated by multi-bounce reflection interference within metallized microstructures and describe the relationships between coloration, reflection efficiency, and microstructure geometry. Ray tracing simulations are combined with experimental, angularly resolved far-field optical analysis for a detailed understanding of the underlying mechanism. Fabrication of microstructures with grayscale lithography and image patterning using metal masking is demonstrated. We further investigate microstructure geometries combining both concave and convex curvatures for highly diversified and more complex tunable optical interference. These results provide insight into how to control the iridescent properties of microstructures with improved structural color saturation and reflectivity by exploiting a multi-bounce interference optical mechanism.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2371–2379 2371–2379"},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the Yellow Electroluminescence (EQEmax = 5.4%) of an Unsymmetrical Perylene Diester Imide","authors":"Paresh Kumar Behera,&nbsp;Sushanta Lenka,&nbsp;Mrinmoy Roy,&nbsp;Feng-Rong Chen,&nbsp;Wei-Zhu Lin,&nbsp;Pei-En Jan,&nbsp;Hao-Wu Lin,&nbsp;Jwo-Huei Jou* and Achalkumar Ammathnadu Sudhakar*,&nbsp;","doi":"10.1021/acsaom.4c0031610.1021/acsaom.4c00316","DOIUrl":"https://doi.org/10.1021/acsaom.4c00316https://doi.org/10.1021/acsaom.4c00316","url":null,"abstract":"<p >An unsymmetrical perylene diester imide (<b>PEI</b>^<b>ST</b>), with flexible chains connected through imide and ester functionalities, was prepared through microwave-assisted synthesis. This compound displayed a remarkable fluorescence quantum yield of 87% and an exceptional performance in a host–guest OLED prepared by doping in CBP at 0.5 wt % concentration, providing an EQE_max of 5.4% complemented by a brightness of 4265 cd/m².</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2221–2228 2221–2228"},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Molecular Designs Featuring Cyanobenzene-Decorated Phenazine Acceptor Units for the Highly Efficient Deep-Red Thermally Activated Delayed Fluorescent Emitters”","authors":"Sunil Madagyal,&nbsp;Arindam Paul,&nbsp;Fong-Yu Yang,&nbsp;Chi-Hao Huang,&nbsp;Pankaj Verma,&nbsp;Prabhakar Chetti,&nbsp;Chih-Hao Chang*,&nbsp;Shantaram Kothavale* and Atul Chaskar*,&nbsp;","doi":"10.1021/acsaom.4c0032210.1021/acsaom.4c00322","DOIUrl":"https://doi.org/10.1021/acsaom.4c00322https://doi.org/10.1021/acsaom.4c00322","url":null,"abstract":"<p >The design and development of long-wavelength deep-red emitters have gained significant attention due to their potential prospective applications in optical communication, night-vision devices, and sensors. However, due to the intrinsic limitations of the energy gap law, creating high-performing deep-red emitters is still found to be difficult. Herein, based on the auxiliary cyanobenzene core attached to the phenazine acceptor unit, we have reported two types of orange-red to deep-red emitting thermally activated delayed fluorescence (TADF) emitters, 4,4′-(3,6-bis(9,9-dimethylacridin-10(9<i>H</i>)-yl)dibenzo[<i>a</i>,<i>c</i>]phenazine-11,12-diyl)dibenzonitrile (<b>Ac-PhCNDBPZ</b>) and 4,4′-(3,6-di(10<i>H</i>-phenoxazin-10-yl)dibenzo[<i>a</i>,<i>c</i>]phenazine-11,12-diyl)dibenzonitrile (<b>PXZ-PhCNDBPZ</b>). A direct attachment of donor units to the phenazine acceptor unit was preferred for steric repulsion between the donor and acceptor units. Hence, more twisted molecular structures are necessary for a small singlet–triplet energy gap (Δ<i>E</i>_ST). Terminal cyanobenzene units helped to further shift the emission wavelength toward the long wavelength region and to minimize the intermolecular interaction to suppress the aggregation-caused emission quenching. Both these emitters exhibited a very small singlet–triplet energy gap (0.13 and 0.06 eV) and short DF lifetime (τ_d) values (2.62 and 1.63 μs). Vacuum-deposited organic light-emitting diodes using <b>Ac-PhCNDBPZ</b> and <b>PXZ-PhCNDBPZ</b> as emitters displayed orange-red and deep-red electroluminescence having maximum external quantum efficiencies of 10.5% and 9.9%, respectively. This work shows that high-efficiency deep-red TADF materials are efficiently produced by combining a cyano substituent with a strong and rigid acceptor.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2248–2261 2248–2261"},"PeriodicalIF":0.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing Perylene Emitters in Soft Hydrogels for White Light Generation","authors":"Wojciech Mróz,&nbsp;Gabriele Tullii,&nbsp;Erika Kozma* and Francesco Galeotti*,&nbsp;","doi":"10.1021/acsaom.4c0041710.1021/acsaom.4c00417","DOIUrl":"https://doi.org/10.1021/acsaom.4c00417https://doi.org/10.1021/acsaom.4c00417","url":null,"abstract":"<p >With the growing demand for energy-efficient lighting solutions, the integration of organic luminophores into light-emitting diode (LED) technology offers a promising way of overcoming the limitations of traditional inorganic phosphors. This study investigates the potential of combining the advantages of organic luminophores (high quantum yield, tunability, and low cost) with hydrogel matrices for white light generation. Specifically, the incorporation of two perylene derivatives, R-PERY and G-PERY, into a hydrogel composite enables the generation of white light when excited by an inorganic blue LED. The performed analysis reveals that our hydrogel-based converters show remarkable features in emission color modulation and the color rendering index. Combined with their softness, water processability, and biocompatibility features, this makes them ideal candidates for light-emitting components in sensing devices interfacing with biological environments.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2380–2386 2380–2386"},"PeriodicalIF":0.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142692166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic Versatility of Lead-Free Cu2+-Doped Cs2AgBiCl6 Double Perovskite in Sustainable Photocatalysis and Quinazoline Synthesis","authors":"Montu Gogoi,&nbsp;Priyanka Gogoi,&nbsp;Pragyashree Borah,&nbsp;Diganta Sarma and Kalyanjyoti Deori*,&nbsp;","doi":"10.1021/acsaom.4c0037710.1021/acsaom.4c00377","DOIUrl":"https://doi.org/10.1021/acsaom.4c00377https://doi.org/10.1021/acsaom.4c00377","url":null,"abstract":"<p >In this report, we present a sustainable, all-inorganic, lead-free double perovskite, Cu²⁺-doped Cs₂AgBiCl₆ (CABC <i>X</i>), designed by using a simple chemical reflux approach. This material features an octahedral morphology and is explored for the first time as a heterogeneous catalyst in the photocatalytic oxidation of benzyl alcohol to aromatic aldehyde. Benzyl alcohol oxidation serves as a model reaction to investigate the impact of Cu²⁺ doping on Cs₂AgBiCl₆, alongside the photocatalytic reduction of nitroaromatics to aniline, unfolding its versatility in various catalytic processes. Additionally, the CABC <i>X</i> perovskite catalyst has been investigated for the synthesis of several pharmaceutically important quinazoline moieties, yielding excellent results. The catalytic protocols are highly sustainable and applicable to a wide range of substrates of respective catalytic reactions with a high yield of products. Photoluminescence studies reveal that as the molar concentrations of the Cu²⁺ dopant increase, the fluorescence intensity of the double perovskite decreases. This trend indicates reduced recombination and better charge separation from <i>X</i> = 0 to <i>X</i> = 30 mmol % Cu²⁺ dopant concentration, contributing to the enhanced photocatalytic activity. Structural and compositional details of the synthesized lead-free perovskite were confirmed through scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, EDX, and X-ray photoelectron spectroscopy studies, while thermal stability was assessed via thermogravimetric analysis. Our findings demonstrate an effective strategy for tuning the photophysical properties of Cs₂AgBiCl₆ through transition-metal doping, thereby expanding its applications in catalysis.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2359–2370 2359–2370"},"PeriodicalIF":0.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoluminescence Behaviors of 2D-Cs3Bi2I9/2D-MoS2 Vertical Heterostructures Prepared by the One-Step CVT Growth Method","authors":"Bojin Zhao,&nbsp;Qiubo Chen,&nbsp;Yukai An,&nbsp;Hongjun Liu,&nbsp;Hailong Qiu*,&nbsp;Ming Liu,&nbsp;Zhanggui Hu and Yicheng Wu,&nbsp;","doi":"10.1021/acsaom.4c0034210.1021/acsaom.4c00342","DOIUrl":"https://doi.org/10.1021/acsaom.4c00342https://doi.org/10.1021/acsaom.4c00342","url":null,"abstract":"<p >Two-dimensional (2D) perovskites are emerging materials with large exciton binding energy, tunable bandgap, and layered properties. The weak van der Waals (vdW) coupling between the layers in 2D perovskites is easy to integrate with other layered materials, such as graphene and transition metal dichalcogenides, forming heterostructures (HS) to expand their functions. In order to obtain excellent HS materials, it is necessary to develop high-quality and low-cost, scalable preparation methods for 2D HS. Notably, chemical vapor transport (CVT) is a powerful method that may meet the above requirements. Herein, we first synthesized the HS of 2D-Cs₃Bi₂I₉/2D-MoS₂ using the one-step CVT method, then characterized its structure and properties, and further elucidated the underlying mechanism of photoluminescence behavior. It has been proven that this is a type II band alignment HS material combined with theoretical calculations. Then, we used a femtosecond pump measurement to study the photodynamic process of the HS and reveal the energy transfer and charge transfer in the HS, which also provides a foundation for future HS device fabrication.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"2 11","pages":"2294–2301 2294–2301"},"PeriodicalIF":0.0,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}