Optical Materials最新文献

{"title":"Excitation-dependent ultraviolet-visible persistent luminescence and charge trapping in Ca2Al2SiO7: Ce3+","authors":"Dace Nilova,&nbsp;Didzis Salnajs,&nbsp;Guna Doke,&nbsp;Andris Antuzevics","doi":"10.1016/j.optmat.2026.117969","DOIUrl":"10.1016/j.optmat.2026.117969","url":null,"abstract":"<div><div>Ultraviolet (UV) persistent luminescence (PersL) materials are notable for their diverse applications, including sterilization, biomedical uses, and anti-counterfeiting markers. In this work, we report an in-depth investigation of luminescence, defect formation, and UV-visible PersL properties of Ce³⁺-activated Ca₂Al₂SiO₇. Structural characterisation confirms successful incorporation of Ce³⁺ into the material. PersL excitation and electron paramagnetic resonance (EPR) spectra measurements suggest photoionisation of Ce³⁺ to Ce⁴⁺. Thermally stimulated luminescence (TSL) spectroscopy analyses reveal that the activation energies of UV-induced charge traps are in the 0.85-1.2 eV range. The PersL of Ca₂Al₂SiO₇: Ce³⁺ can be detected for longer than 48 h above the 5⋅10⁻⁴ mW/m²/sr radiance threshold. Moreover, its emission reaches a power density of 12.55 mW/m² at 10 s after UV excitation, demonstrating both a high initial signal intensity and slow decay. These results reveal crucial information about achieving optimal performance of Ca₂Al₂SiO₇: Ce³⁺ as an efficient UV-visible persistent phosphor.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117969"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385261","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":"Epitaxial growth of CsPbCl3@Cs2NaInCl6 core-shell nanocrystals with enhanced luminescence and stability","authors":"Guiyuan Liu,&nbsp;Wannan Dai,&nbsp;Ziyue Wang,&nbsp;Xiaotian Lu,&nbsp;Ying Ma","doi":"10.1016/j.optmat.2026.117977","DOIUrl":"10.1016/j.optmat.2026.117977","url":null,"abstract":"<div><div>Metal halide perovskite (MHP) nanocrystals (NCs) exhibit outstanding optoelectronic properties, making them promising candidates for light-emitting diodes (LEDs). However, their practical application is severely hindered by poor environmental stability. Specifically, violet-emitting CsPbCl₃ NCs suffer from low luminescence properties because of deep-level trap-mediated non-radiative recombination. Here, we report a core-shell structure in which a CsPbCl₃ NC is epitaxially coated with a Cs₂NaInCl₆ double perovskite shell via a hot-injection method. The resulting CsPbCl₃@Cs₂NaInCl₆ heterostructures feature type-I band alignment, enabling effective surface defect passivation and strong charge carrier confinement within the CsPbCl₃ core. As a result, the photoluminescence quantum yield (PLQY) of CsPbCl₃ NCs increases dramatically from 4.4% to 49.5%, accompanied by a prolonged photoluminescence lifetime and a narrower emission spectral full width at half maximum (FWHM). Beyond luminescence enhancement, the Cs₂NaInCl₆ shell imparts remarkable resistance against damage from water, UV irradiation, and heat. Furthermore, the same encapsulation strategy significantly improves the stability of Mn and Ni-doped CsPbCl₃ (CsPbCl₃:Mn and CsPbCl₃:Ni) NCs. This work provides an effective strategy to simultaneously enhance luminescence performance and environmental stability of CsPbCl₃ NCs through passivation with a double perovskite shell.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117977"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385381","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":"New development in GYAP:Ce multicomponent perovskites","authors":"Jiri A. Mares ,&nbsp;Alena Beitlerova ,&nbsp;Monika Kotykova ,&nbsp;Carmelo D'Ambrosio ,&nbsp;Tomas Marek ,&nbsp;Jan Tous ,&nbsp;Jan Polak ,&nbsp;Karel Blazek ,&nbsp;Martin Nikl","doi":"10.1016/j.optmat.2026.117963","DOIUrl":"10.1016/j.optmat.2026.117963","url":null,"abstract":"<div><div>The detailed scintillation response and properties of newly developed GYAP:Ce single crystals were studied using γ-ray quanta in the 8–1300 keV energy range (light yield, energy resolution, nonproportionality and scintillation decay). The scintillating properties of these multicomponent GYAP:Ce crystals were compared with those of the latest grown YAP:Ce crystals. In general, GYAP:Ce crystals exhibit a higher light yield of up to 30000 ph/MeV against 23000 ph/MeV for YAP:Ce reference crystal. The energy resolution of YAP:Ce is ≈ 4–5% for 662 keV energy of ¹³⁷Cs source, while for GYAP:Ce crystals values between 5 and 9 % were observed. The non-proportionality of GYAP:Ce crystals reach ∼70-80% at an energy of 10 keV while that of YAP:Ce reaches ∼85 %. 1/e scintillating decay times of GYAP:Ce crystals are between 60 and 100 ns which is almost twice higher than ≈48.8 ns 1/e decay time of YAP:Ce reference crystal. Another difference between GYAP:Ce multicomponent and YAP:Ce crystals is a presence of slow decay components in GYAP:Ce compared with YAP:Ce due to energy transfer processes between Ce³⁺ impurity and Gd³⁺ sublattice ions.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117963"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385388","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 mechanoluminescence of ZnS:Mn and red shift at low temperatures","authors":"Debendra Timsina ,&nbsp;Stephen W. Allison ,&nbsp;William A. Hollerman ,&nbsp;Firouzeh Sabri","doi":"10.1016/j.optmat.2026.117951","DOIUrl":"10.1016/j.optmat.2026.117951","url":null,"abstract":"<div><div>Manganese-doped zinc sulfide (ZnS: Mn) is one of the brightest mechanoluminescing materials. While its mechanoluminescing properties at room-temperature have been widely studied, its behavior at cryogenic temperatures remains underexplored. Here, we report mechanoluminescence measurements of ZnS: Mn at 77 K and compare the results with room-temperature behavior. A ∼200 μm thick layer of ZnS:Mn powder mixed in Sylgard-184 was coated onto a RTV655 disc of 25 mm diameter and 3 mm thickness. Two different configurations were tested. In one case (C1), the impact force was applied directly to the ZnS: Mn coating while in the second configuration (C2) the force was applied to the RTV655 side of the sample. Results show up to a fivefold increase in emission intensity at 77K compared to room temperature behavior and a noticeable red shift in the emission band. When testing under C1, the fast and slow decay times reduced from 129.6 ± 4 μs to 55.5 ± 5.7 μs and from 890.6 ± 150.1 μs to 290.9 ± 25.4 μs, respectively. In C2 the fast decay increased from 38.3 ± 1.7 μs to 82.2 ± 16.1 μs, and the slow decay increased from 318.3 ± 12.8 μs to 357.8 ± 40.6 μs. Under C1, the rise time did not show any temperature dependency. However, under C2, the rise time decreased with decrease in temperature. This study paves the way for a better understanding of temperature dependent mechanoluminescence of ZnS: Mn and designing sensing devices for testing under extreme conditions.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117951"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384676","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":"Dual-mode Upconversion and Downconversion in Yb3+/Er3+ Co-doped BiOCl for enhanced solar spectrum harvesting","authors":"Paramsinh Zala ,&nbsp;Brijesh Tripathi ,&nbsp;Vineet Kumar ,&nbsp;Krunal Baria ,&nbsp;Mayank Gupta ,&nbsp;Prakash Chandra ,&nbsp;Manoj Kumar ,&nbsp;Shubhda Srivastava ,&nbsp;Bipin Kumar Gupta","doi":"10.1016/j.optmat.2026.117929","DOIUrl":"10.1016/j.optmat.2026.117929","url":null,"abstract":"<div><div>In this work, we have synthesized and optically characterized BiOCl phosphor containing Yb³⁺ and Er³⁺ ions, resulting in dual-mode photoluminescence (PL) via both Upconversion (UC) and Downconversion (DC). The nanophosphors were synthesized via hydrothermal synthesis, yielding a flower-like morphology composed of self-assembled nanosheets. The UC characterization under 980 nm excitation exhibits visible emission bands at 509-515 nm, 545-557 nm, and 635-655 nm, demonstrating energy transfer from Yb³⁺ sensitizers to Er³⁺ activators. The emission bands at ∼525 nm, ∼545 nm, and ∼620 nm are assigned to the Er³⁺ transitions ²H_11/2 → ⁴I_15/2, ⁴S_3/2 → ⁴I_15/2, and ⁴F_9/2 → ⁴I_15/2, respectively, originating from Bi³⁺-sensitized energy transfer under 380 nm excitation. The absorption of various excitation wavelengths by BiOCl doped rare earth material, ranging from UV to NIR, and emits in the visible region, giving the absolute Quantum Yield of 0.66%, offering huge Stokes and anti-Stokes shift concurrently. Structural, morphological, and chemical investigations indicated that dopants were successfully incorporated into the BiOCl lattice. The resulting phosphors were embedded in a resin matrix to fabricate a luminescent solar concentrator (LSC) slab, demonstrating potential for application in solar windows and building-integrated photovoltaic (BIPV).</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117929"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384778","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":"Al induced multimodal photo characteristics of CdS CQDs Thin Films","authors":"Tania Kalsi ,&nbsp;Nupur Saxena ,&nbsp;Sachin Kumar Godara ,&nbsp;Sandeep Arya ,&nbsp;Ashok Bera ,&nbsp;Pragati Kumar","doi":"10.1016/j.optmat.2026.117998","DOIUrl":"10.1016/j.optmat.2026.117998","url":null,"abstract":"<div><div>High quality CdS colloidal quantum dots (CQDs) are evolving as host materials for the optically active dopant due to their wide bandgap and quantum confinement of excitons. Doping is mostly done for the production and modification of semiconductor materials with enhanced optical and electrical properties. Herein, the cost-effective and easy fabrication of visible-NIR PDs is demonstrated by employing the CQDs thin films (TFs) of Al-doped CdS. Further, the effect of dopant concentration on the photosensing behaviour under different illumination of lights ranging from 405 nm to 845 nm is investigated. The enhancement in the photosensing parameters of CdS can be observed after the successful doping. The sensitivity (<em>S)</em> for <em>A</em>_<em>0</em> device is calculated to be ∼145 % under the illumination of 405 nm, which is almost one order less than the highest observed <em>S</em> value (∼1182 %) for <em>A</em>_<em>2</em> device under 532 nm. Similarly, other performance parameters i.e. responsivity (<em>R)</em>, external quantum efficiency (<em>EQE)</em> and detectivity (<em>D),</em> are ∼ 27.74 AW^-1, 64.35 × 10² % and 2.01 × 10¹² cmHz^1/2W⁻¹, respectively and are maximum for <em>A</em>_<em>2</em> device, which are significantly higher than those for the devices having optimal illumination in NIR region. In our study, compared with undoped CdS, a pronounced enhancement in the performance parameters of the detector is obtained by the incorporation of Al³⁺ ions.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117998"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384888","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":"Multistable polymer-stabilized cholesteric liquid crystal smart windows enabled by EHD and dielectric effects: A thiol-acrylate polymer network modulation strategy","authors":"Xiaoning Yang ,&nbsp;Xiaoshuai Li ,&nbsp;Feifei Wang ,&nbsp;Ruolong Lin ,&nbsp;Hongmei Ma ,&nbsp;Yubao Sun","doi":"10.1016/j.optmat.2026.117996","DOIUrl":"10.1016/j.optmat.2026.117996","url":null,"abstract":"<div><div>Conventional liquid crystal (LC) smart windows suffer from high energy consumption, as they require a continuous power supply to sustain multiple transmittance states, an issue that conflicts with global goals of energy conservation and sustainability. To address this critical limitation, this study focuses on developing thiol-acrylate polymer network-stabilized multistable cholesteric liquid crystal (ChLC) smart windows, with performance enabled by the synergistic combination of the electrohydrodynamic (EHD) effect and the dielectric effect. A complex polymer network was constructed by precisely adjusting the mass ratio of thiol to acrylate monomers, followed by UV curing of the ChLC-monomer mixture. This curing process simultaneously initiates two key reactions: acrylate homopolymerization reaction and thiol-acrylate Michael addition reaction, forming a network with both rigid homopolymer chains and flexible polymer segments that is critical for stabilizing multistable states. Through the regulation of the driving voltage at a fixed frequency (low frequency: 50 Hz, high frequency: 2 kHz), the device achieves not only dynamic transmittance control but also sustained multistability after voltage removal: transmittance can be stably tuned across a range of ∼10% to ∼80% (in ∼10% increments in experiments), without the need for continuous power input. The optimized device exhibits excellent performance metrics: low driving voltages (saturation voltage: 7.37 V at low frequency, 12.75 V at high frequency), a steady-state contrast ratio of 8.3, and an on-state (powered) contrast ratio of 288.5. A 72-h stability test confirmed that each transmittance state remains highly stable, with only marginal fluctuations attributed to minimal molecular rearrangement. This research provides a reliable technical route for low-power multistable smart windows. The thiol-acrylate polymer network effectively resolves the long-standing trade-off between multistability and energy consumption in traditional ChLC devices, holding significant potential for applications in building energy efficiency optimization and intelligent lighting systems, aligning with global carbon neutrality objectives.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117996"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385144","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":"Formation of Ge-based Schottky diodes by pulsed laser deposition of carbon layer","authors":"Olga V. Vikhrova,&nbsp;Mikhail V. Dorokhin,&nbsp;Yuri A. Danilov,&nbsp;Valery P. Lesnikov,&nbsp;Polina B. Demina,&nbsp;Natalia V. Dikareva,&nbsp;Mikhail V. Ved’,&nbsp;Anton V. Zdoroveyshchev,&nbsp;Irina L. Kalentyeva,&nbsp;Ruslan N. Kriukov,&nbsp;Aleksey V. Nezhdanov","doi":"10.1016/j.optmat.2026.117899","DOIUrl":"10.1016/j.optmat.2026.117899","url":null,"abstract":"<div><div>A 4 nm thick carbon layer was obtained by pulsed laser deposition in vacuum directly on the surface of an <em>n</em>-Ge wafer. The carbon played a role of an intermediate layer in Au/C-layer/<em>n</em>-Ge mesa-diodes allowing the formation of a photosensitive structure with a dark reverse current density of 0.026 A/cm², a barrier height of 0.6 V and a maximum spectral sensitivity in the wavelength range of 1.4–1.6 μm.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117899"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385149","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 stability of perovskite CsPbBr3 nanocrystals via dual passivation with Al(acac)3 and commercial polymer for solar cell encapsulation application","authors":"Feng Tong ,&nbsp;Xichuan Cao ,&nbsp;Xiuquan Gu ,&nbsp;Zheng Chen","doi":"10.1016/j.optmat.2026.117925","DOIUrl":"10.1016/j.optmat.2026.117925","url":null,"abstract":"<div><div>To improve the stability of CsPbBr₃ perovskite nanocrystals (PNCs), a facile in situ synthesis route was developed, followed by surface passivation with aluminum acetylacetonate (Al (acac)₃) and encapsulation using a commercial polyolefin elastomer (POE). Through this simple polymer scraping process, the CsPbBr₃/Al (acac)₃/POE composite films were obtained, in which the PNCs with sizes of 10∼15 nm were uniformly dispersed in the polymer and protected by both inorganic ligands and polymer. The as-obtained nanocomposite films also exhibit good flexibility, tensile and fluorescence properties. Owing to the effective passivation of surface defects, the PL intensity of CsPbBr₃ NCs was increased by 29% after incorporating the Al (acac)₃ ligand. Meanwhile, it was found that the Al (acac)₃ ligand also facilitates enhancing the thermal/water stability of CsPbBr₃/POE film: the film after passivation retained 63% of the initial intensity after 15 days of soaking in water, as well as remained 45% of the initial intensity after 5 h of heating at 85 °C. Both the stability values were significantly higher than those of the reference sample CsPbBr₃/POE. In terms of device applications, CsPbBr₃@ Al (acac)₃/POE could be applied as a photovoltaic adhesive film for enhancing the power conversion efficiency of the crystal Si solar cell. By using a CsPbBr₃@ Al (acac)₃/POE film, the absolute power conversion efficiency (PCE) of a standard solar cell was improved by 0.55% (from 12.01% to 12.56%), which was higher than those of photovoltaic cells covered with pure POE film (0.29%) and CsPbBr₃/POE film (0.43%), respectively. The performance enhancement can be attributed to the down-conversion effect of PNCs, which convert ultraviolet light into visible emission centered at 520 nm, thereby improving the utilization of the solar spectrum.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117925"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385151","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":"Novel metal-induced surface passivation of ZnO for strong supression of defect emission luminescence","authors":"Ngo Thi Quyen ,&nbsp;Hoang Gia Chuc ,&nbsp;Do Quang Trung ,&nbsp;Nguyen Tu ,&nbsp;Nguyen Van Du ,&nbsp;Pham Thanh Huy ,&nbsp;Phuong Dinh Tam ,&nbsp;Manh Trung Tran","doi":"10.1016/j.optmat.2026.117933","DOIUrl":"10.1016/j.optmat.2026.117933","url":null,"abstract":"<div><div>Metal doping in ZnO often enhances defect-related visible emission, limiting UV performance. We report a PdO/Pd-induced surface passivation strategy to improve the optical quality of ZnO nanorods. Structural and spectroscopic analyses confirm PdO/Pd surface decoration and strong interfacial coupling with ZnO. The PdO/Pd layers suppress deep-level emission and enhance near-band-edge luminescence via synergistic defect passivation, interfacial band bending, and localized surface plasmon effects. As a result, the ZnO/PdO/Pd heterostructures exhibit a 52.6-fold increase in the UV-to-visible emission ratio.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117933"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385155","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}