Optical Materials最新文献

{"title":"Electrically tunable dual-band extraordinary transmission with a graphene hybrid metasurface","authors":"Yujing Zhang,&nbsp;Jiameng Nan,&nbsp;Weiqi Cai,&nbsp;Jing Xu,&nbsp;Hongkui Shi,&nbsp;Fuli Zhang,&nbsp;Yuancheng Fan","doi":"10.1016/j.optmat.2025.117014","DOIUrl":"10.1016/j.optmat.2025.117014","url":null,"abstract":"<div><div>Metasurface is a kind artificial composite composed of subwavelength structures arranged for novel optical properties. Here we propose and demonstrate a metasurface made of hybrid metal-graphene structure for electrically tunable dual-band electromagnetic extraordinary optical transmission (EOT). Considering the tunability of the conductivity of graphene with applied voltage as well as the freely designed EOT operating in independent frequency bands, the transmission of the dual-band EOT can be efficiently controlled by tuning the biasing voltage on the graphene layer. The electrical tunability of the dual-band EOT behavior is confirmed by full-wave simulation and experimental characterization. The measured results show that the designed metasurface achieves 57.6 % and 32.2 % transmittance at 9.49 GHz and 11.47 GHz, respectively, and 45.7 % and 28 % modulation are achieved when the graphene is biased. The proposed hybrid metasurface enriches the modulation mechanism of electromagnetic EOT behavior through tunable properties of graphene and has certain application prospects in sensors and filter devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 117014"},"PeriodicalIF":3.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747965","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":"SiO2 fluorescent nanofiber film incorporating Eu3+-doped for inorganic red light-emitting diode","authors":"Leixuan Li,&nbsp;Yanxin Wang,&nbsp;Wei Xing,&nbsp;Xiaotong Zhang,&nbsp;Hanwen Wang,&nbsp;Huiyi Wu,&nbsp;Jian Wang,&nbsp;Linjun Huang,&nbsp;Jianguo Tang","doi":"10.1016/j.optmat.2025.117009","DOIUrl":"10.1016/j.optmat.2025.117009","url":null,"abstract":"<div><div>Recently, the application of rare earth elements in LEDs has attracted widespread attention. This article conducts in-depth research on rare earth fluorescent nanofiber membrane materials. Firstly, Eu³⁺, 2-thenoyltrifluomacetonate (tta), and 1,10-phenanthroline (Phen) undergo a complexation reaction to form the Eu(tta)₃Phen complexes. The highly efficient fluorescent hybrid material SiO₂@Eu(tta)₃Phen prepared by using a straightforward doping method to mix the Eu(tta)₃phen complexes with synthetic silica nanoparticles. Fluorescent nanofiber membranes that emit uniform red light was prepared by loading SiO₂@Eu(tta)₃Phen onto PVA nanofiber membrane (PNM) and SiO₂ nanofiber film (SNF) by filtration. After calculation, the loading amount of FSNF and FPNM were 55.6 % and 38.4 %, respectively. It was found that SiO₂ fluorescent nanofiber film (FSNF) had better fluorescence performance than PVA fluorescent nanofiber membrane (FPNM) under excitation at 384 nm wavelength. FSNF and FPNM were applied to LED components, both of which exhibited excellent fluorescence. The chromaticity coordinate (x, y) of FSNF is (0.6545, 0.3418), the correlated color temperature (CCT) is 1000K. The chromaticity coordinate (<em>x</em>, <em>y</em>) of FPNM is (0.6496, 0.3396), with a correlated color temperature (CCT) of 1000K. However, FSNF has a significant improvement in the persistence of ultraviolet irradiation compared to FPNM. These findings demonstrate that the developed FSNF have tremendous potential in white LEDs.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 117009"},"PeriodicalIF":3.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739009","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":"Enhanced and modulated ∼2.9 μm mid-infrared emission of Ho3+/Pr3+: LiYF4 single crystal by co-doping non active Lu3+ ions","authors":"Yi Shi ,&nbsp;Lizhi Fang ,&nbsp;Haiping Xia ,&nbsp;Hongwei Song ,&nbsp;Baojiu Chen","doi":"10.1016/j.optmat.2025.117008","DOIUrl":"10.1016/j.optmat.2025.117008","url":null,"abstract":"<div><div>A hitherto undeveloped Pr³⁺/Ho³⁺: LiYF₄ single crystal by introducing non-active Lu³⁺ ions was synthesized by a reformative Bridgman technique. The crystalline phases and optical properties of the crystals were characterized using various methods, including absorption spectra, X-ray diffraction (XRD), Rietveld refinement, emission spectra, and lifetimes. The band gaps of Ho³⁺/Pr³⁺: LiYF₄ (Ho³⁺/Pr³⁺: LYF) and Ho³⁺/Pr³⁺/Lu³⁺: LiYF₄ (Ho³⁺/Pr³⁺: LLYF) single crystal were calculated by density functional theory, the value is ∼7.902 eV and ∼7.692 eV, respectively. The ∼2.9 μm emission intensity significantly increased about two times when Lu³⁺ (3.0 mol%) was added to 0.1Pr³⁺/0.5Ho³⁺: LiYF₄single crystal due to the disruption of [Ho³⁺-Ho³⁺] quenching clusters formed by Ho³⁺ ions. The maximum emission cross section of 0.1Pr³⁺/0.5Ho³/3.0Lu³⁺: LiYF₄ single crystal was ∼22.7 × 10⁻²¹ cm². The doping of Lu³⁺ ions reduced significantly the lifetime of ⁵I₇ energy level and mitigates effectively the self-termination phenomenon. Thus, the incorporation of Pr³⁺/Ho³⁺/Lu³⁺ into LiYF₄ single crystal represented a promising choice for a laser gain medium operating at ∼2.9 μm, as well as for other optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 117008"},"PeriodicalIF":3.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739132","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":"Effect of Sn on the structural, morphological and optical properties of liCoPO4","authors":"Mohamed S.I. Koubisy ,&nbsp;Wael Mohammed ,&nbsp;Fatemah H. Alkallas ,&nbsp;Amira Ben Gouider Trabelsi ,&nbsp;Shoroog Alraddadi ,&nbsp;Abdelaziz M. Aboraia","doi":"10.1016/j.optmat.2025.116977","DOIUrl":"10.1016/j.optmat.2025.116977","url":null,"abstract":"<div><div>In the presented work, the influence of Sn doping on structural, morphological, and optical properties is systematically investigated. In this regard, in order to overcome such drawbacks, Sn was incorporated into the LiCoPO₄ matrix through a solid-state synthesis route by varying the Sn concentration from 0 to 8 mol%. XRD recorded the structural changes upon Sn doping, which indicated that Sn incorporation did not change the LiCoPO₄ primary orthorhombic olivine structure, though inducing minor changes in the lattice parameters due to the radius difference between Sn⁴⁺ and Co²⁺. TEM studies were performed to investigate the morphological properties. The optical properties were studied by UV–Vis spectrophotometer and showed a gradual decrease of the optical bandgap with increasing Sn content, the highest bandgap (3.94 eV) was obtained for x = 0 of Sn while the lowest value of band gap (3.64) was obtained for x = 0.08 of Sn. The refractive index decreased with an increase in the concentrations of Sn, 1.8 to 1.6 respectively. The non-linear absorption coefficient increases with Sn doping. Thus, these findings provide a new route to modify the properties of LiCoPO₄ for energy storage and also manifest Sn as a potential dopant for enhancing the performances of transition metal phosphates, particularly in various technological uses. This study therefore paves the way for further optimization of LiCoPO₄ and similar materials for high-performance batteries and other functional devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116977"},"PeriodicalIF":3.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747962","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":"Optical spectroscopy of exchange-coupled ions: Insights into homonuclear, heteronuclear and mixed transition-metal/rare-earth systems","authors":"Diego Pérez-Francés ,&nbsp;Fernando Rodríguez ,&nbsp;Rafael Valiente","doi":"10.1016/j.optmat.2025.116965","DOIUrl":"10.1016/j.optmat.2025.116965","url":null,"abstract":"<div><div>In 1988, McCarthy and Güdel published the seminal review <em>Optical Spectroscopy of Exchange-Coupled Transition Metal Complexes</em>, which not only compiled key spectroscopic results but also provided a deep insight into the theoretical foundations of the field, originally developed by Tanabe in the 1960s, which is undoubtedly the most insightful review in this topic to date. The work presented here aims to pay a modest tribute to Prof. Hans U. Güdel for his outstanding contributions and career — a scientist who was a guiding figure for many of us entering the field of spectroscopy. This review provides an updated overview of key experimental findings where exchange-coupled systems play a fundamental role, many of which involved direct contributions from Prof. Güdel himself. We begin by discussing homonuclear transition-metal systems, such as Mn<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>–Mn<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span> and Mn<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>–Mn<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> pairs, highlighting the unique features of their absorption and emission spectra, as well as their lifetimes — phenomena that are not observed in isolated ions. The discussion then extends to heteronuclear mixed-metal systems, specifically transition-metal/rare-earth ion pairs, such as Mn<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>–Yb<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>. In these systems, a novel upconversion luminescence mechanism was proposed, based on exchange interaction via the Tanabe mechanism between Yb<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> and Mn<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>. Significant enhancement of optical absorption and its temperature dependence was attributed to Mn<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>–Cu<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span> exchange interaction units. Finally, we compare results from two Ni<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>-doped isostructural materials — Rb<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>CdCl<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and Rb<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>MnCl<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> — emphasizing the potential of exchange coupling mechanism to enhance luminescence efficiency.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116965"},"PeriodicalIF":3.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739011","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 improvements in structural, optical, and photodetection characteristics of CZTS thin films through Ag-doping","authors":"Fazal Rehman ,&nbsp;Salih Yılmaz ,&nbsp;İsmail Polat ,&nbsp;Emin Bacaksız ,&nbsp;Recep Zan ,&nbsp;Mehmet Ali Olgar","doi":"10.1016/j.optmat.2025.117006","DOIUrl":"10.1016/j.optmat.2025.117006","url":null,"abstract":"<div><div>The study investigated the characterization of photodetectors made from CZTS (Cu₂ZnSnS₄) thin films by introducing silver (Ag) as a dopant. CZTS thin films were grown on Mo-foil by two stage process, comprising sputter deposition of metallic precursor layers followed by sulfurization process employing Rapid Thermal Annealing (RTA) approach. The stacking order for the undoped and Ag-doped CZTS thin films were Substrate/ZnS/Cu/Sn/Cu and Substrate/ZnS/Cu/Sn/Cu/Ag, respectively. Photodetectors (PDs) were fabricated using sputter deposition on glass, including CZTS, Ag-doped CZTS-5 (8 nm Ag), Ag-doped CZTS-10 (16 nm Ag), and Ag-doped CZTS-15 (24 nm Ag). Various characterization methods were utilized to examine the prepared thin films, including Energy Dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy, Scanning Electron Microscopy (SEM), optical transmission, Photoluminescence (PL) and photodetection analyses. Among all devices, Ag-CZTS-10 PDs exhibited the best performance, showing a crystallite size (<em>D</em>) of 51.72 nm, band gap of 1.47 eV and favorable SEM surface morphology. For the photodetection characteristics, blue light at 443 nm and red light at 525 nm wavelength were used with an applied bias of 2V, and a light intensity of 17.3 mW/cm². The highest responsivity (R) values recorded for Ag-CZTS-10-based PDs were 0.0024 A/W for blue and 0.0019 A/W for red light. Additionally, the detectivity (D∗) was 3.4 × 10⁶ Jones for blue and 2.3 × 10⁶ Jones for red light, while sensitivity (S) was 26 % for blue and 15 % for red light. This study successfully demonstrated, for the first time, the fabrication of low-cost, high-performance Ag-doped CZTS films-based PDs on glass substrates which hold promise for the development of cost-effective and efficient optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 117006"},"PeriodicalIF":3.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747964","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":"Optical properties of one-dimensional porous silicon photonic crystals coated with a thin nickel film","authors":"Danilo Roque Huanca","doi":"10.1016/j.optmat.2025.116991","DOIUrl":"10.1016/j.optmat.2025.116991","url":null,"abstract":"<div><div>The surface of the one-dimensional porous silicon photonic crystal was modified by depositing a thin nickel layer with a nominal thickness of 80 nm. Optical characterization, performed via reflectance spectrum simulation and experimental measurements, demonstrated that the sequence of unit cells in the uppermost layers significantly affects the morphological characteristics of the porous structure. This effect leads to the formation of layers with inhomogeneities in thickness and porosity. After nickel deposition, fitting analysis employing the transfer matrix method revealed that photonic devices with low porosity and smaller pores in their first upper layer exhibit higher reflectance at the wavelength below the photonic band gap center, along with a narrower photonic band gap. This enhancement is attributed to the reflectance contribution of the relatively thin nickel film formed by the partial sealing of the small pores. In contrast, devices with greater porosity and larger pores exhibit suppressed photonic band gaps, making the photonic structure highly effective as an absorptive material. After thermal treatment, a partial recovery of the reflectance and the shape of the photonic band was observed. This recovery was more pronounced on the left edge, reaching approximately 80 % in the device with high porosity in their initial layer, while those with low porosity reach only around 40 % recovery.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116991"},"PeriodicalIF":3.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734986","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":"Harnessing inherent charge retention characteristics of ZnO thin films for capacitive ultraviolet dosimeters","authors":"Abhishek Ranjan ,&nbsp;Aishani Mazumder ,&nbsp;Narayanan Ramakrishnan","doi":"10.1016/j.optmat.2025.116986","DOIUrl":"10.1016/j.optmat.2025.116986","url":null,"abstract":"<div><div>Over the years, ZnO, a well-known transparent semiconducting oxide (TSO) has been continuously investigated due to its inherent electronic and optoelectronic properties. Despite its remarkable visible blind optoelectronic properties, its application as a UV-specific detector remains a challenge due to its slow recovery. Although this charge retention characteristic is beneficial for synaptic applications, it becomes disadvantageous for UV detection and monitoring purposes. Thus, a gap remains in utilising this well-established TSO's charge retention characteristics as a UV detector and cumulative dosage calculator in the visible-blind region. Hence, an alternate instrumentation strategy is needed to exploit the UV-only absorption properties of ZnO to demonstrate a reliable UV-based dosimeter. In this work, we exploit the structural design of interdigitated electrodes (IDE) to utilise the capacitive properties of RF-sputtered ZnO thin films. Significantly large capacitance changes in the range of 10 ⁻¹¹ – 10 ⁻⁹ F are observed in the device upon UV illumination. The ZnO-based device demonstrates an increasing trend in capacitive changes upon cumulative UV exposure, even at low intensities of 50 μW/cm² which, remains unobserved in its resistive changes. The performance of the devices is evaluated under the influence of humidity and temperature and its feasibility as a dosimeter is demonstrated. Such a demonstration on a flexible platform provides a pathway for integrating ZnO thin films as a wearable UV dosimeter monitoring device in the future.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116986"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735082","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":"Synthesis of ZnO nanorods on TiO2 and ZnO inverse opal structures prepared via thermal-atomic layer deposition and hydrothermal growth for photocatalytic applications","authors":"Lucy Nyambura Karanja ,&nbsp;Dániel Karajz ,&nbsp;Dóra Hessz ,&nbsp;Tamás Igricz ,&nbsp;Baradács Eszter Mónika ,&nbsp;Pál Petra ,&nbsp;Zoltán Erdélyi ,&nbsp;Csaba Cserháti ,&nbsp;Barbara Sárközi ,&nbsp;Imre Miklós Szilágyi","doi":"10.1016/j.optmat.2025.116989","DOIUrl":"10.1016/j.optmat.2025.116989","url":null,"abstract":"<div><div>Industrial pollutants, including synthetic dyes and organic compounds, pose serious environmental risks, making efficient remediation methods crucial. In this study, opal templates were fabricated using the Evaporation Induced Confined Area Assembly (EICAA) method, where polystyrene nanospheres (300 nm) were precisely assembled on silicon wafers. Subsequently, ZnO and TiO₂ layers were deposited onto the templates using thermal ALD. The polystyrene templates were then removed via calcination at 500 °C. Hydrothermal synthesis was employed to grow ZnO nanorods on the prepared structures. Comprehensive characterization was conducted using TG/DTA/DTG, SEM-EDX, XRD, Raman spectroscopy, UV–Vis spectrophotometry, and photoluminescence analysis. The results showed that the samples exhibited a well-ordered, crystalline inverse opal structure with vertically aligned nanorods on their surface. The photocatalytic performance of the samples was evaluated through the degradation of methylene blue and 4-nitrophenol under UV and visible light irradiation.</div><div>Photocatalytic tests revealed that ZnO inverse opals exhibited higher photocatalytic activity than TiO₂ inverse opals. The growth of ZnO nanorods on TiO₂ inverse opals significantly improved their activity, owing to the formation of a micro p-n junction between TiO₂ and ZnO, which enhanced electron-hole separation and reduced recombination rates. ZnO nanorods on ZnO inverse opals demonstrated overall higher activity, benefiting from their increased surface area and charge transport properties. These findings highlight ZnO-based photocatalysts as promising for the degradation of various pollutants, demonstrating potential for environmental remediation applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116989"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Tetraphenyl ethylene derivatives exhibiting aggregation induced emission enhancement for OLEDs and optical sensors of nitroaromatic explosives","authors":"Santhiya Kuppusamy ,&nbsp;Melika Ghasemi ,&nbsp;Ehsan Ullah Rashid ,&nbsp;Dmytro Volyniuk ,&nbsp;Oleksandr Bezvikonnyi ,&nbsp;Khushdeep Kaur ,&nbsp;Jurate Simokaitiene ,&nbsp;Audrius Bucinskas ,&nbsp;Mariia Stanitska ,&nbsp;Oleksandr Navozenko ,&nbsp;Juozas V. Grazulevicius","doi":"10.1016/j.optmat.2025.116988","DOIUrl":"10.1016/j.optmat.2025.116988","url":null,"abstract":"<div><div>The design, synthesis, and properties of derivatives of tetraphenyl ethylene (TPE) and donor moieties of <em>tert</em>-butylcarbazole and dimethylacridane are described. The targeted compounds are characterized by single crystal X-ray analysis, mass and NMR spectrocopies. With the temperatures of the onsets of thermal decomposition of <em>ca.</em> 450–520 °C, the compounds exhibit remarkably high thermal stability. Density functional theory calculations are employed to investigate the frontier molecular orbitals and charge transfer dynamics between the distinct moieties of the studied compounds. The dimethylacridine derivative exhibits pronounced charge transfer, as elucidated through the experimental study of the solvatochromic effect. The results of the study of the photophysical properties of the dispersions of the compounds in the mixtures of THF and water demonstrate a pronounced aggregation-induced emission enhancement. The applicability of the synthesized compounds for the detection of nitroaromatic explosives is demonstrated, on the example of quenching of their emission by picric acid. The film of <em>tert</em>-butylcarbazolyl-substituted TPE exhibits almost twice photoluminescence quantum yield than a dimethylacridine-based counterpart. Due to this and a suitable energy level of HOMO of −5.43 eV, the derivative of TPE and <em>tert</em>-butylcarbazole is applied as emitter in a sky-blue organic light emitting diode, reaching external quantum efficiency of 1.7 % without doping into a host material.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"163 ","pages":"Article 116988"},"PeriodicalIF":3.8,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726292","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}