Valentin Petrov , Li Wang , Ginka Exner , Shivashankar R. Vangala , Aleksandar Grigorov , Elizabeth Ivanova , Peter G. Schunemann , Vladimir L. Tassev
{"title":"Transmission and nanohardness studies of ternary GaAs1-xPx layers grown from the vapor phase by heteroepitaxy","authors":"Valentin Petrov , Li Wang , Ginka Exner , Shivashankar R. Vangala , Aleksandar Grigorov , Elizabeth Ivanova , Peter G. Schunemann , Vladimir L. Tassev","doi":"10.1016/j.omx.2024.100313","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100313","url":null,"abstract":"<div><p>Transmission measurements in the 0.5–25-μm spectral range are performed on thin (<350-μm) GaAsP layers grown by Hydride Vapor Phase Epitaxy (HVPE) on plain (100) GaAs substrates. Comparison with calculations taking into account multiple reflections reveals the role of the surface polishing quality on the clear transmission window and the wavelength dependent losses. A measurement of a 5-mm thick epitaxially grown GaP underlines more realistic spectral limitations on the application of orientation-patterned structures based on GaP and GaAsP for nonlinear optical frequency conversion. The mid-IR cut-off wavelength for the ternary GaAsP layers is almost independent of the composition and corresponds to the same two-phonon absorption limit observed in the binary GaP. Nanohardness and Young's modulus are measured for the same samples to evaluate their compositional dependence. The nanohardness dependence on the P-content obeys a second order polynomial law with a maximum around P = 0.8. Young's modulus depends linearly on the P-content, similar to the trend observed in other ternary systems, such as In<sub>x</sub>Ga<sub>1−x</sub>As and In<sub>x</sub>Ga<sub>1-x</sub>P. The evolution of the band-gap, estimated from the transmission measurements, with the composition of the ternary compounds is linear in the range of 0–0.5 for the P content. In this same range the nanohardness can be considered to be linearly proportional to the band-gap.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100313"},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000251/pdfft?md5=43062240c91a76c8cd7895a8380dfbbe&pid=1-s2.0-S2590147824000251-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140330758","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}
Nikola Bednarska-Adam , Marta Kuwik , Tomasz Goryczka , Wojciech A. Pisarski , Joanna Pisarska
{"title":"Red-emitting olivine-type ceramic luminophores Li2MGeO4 (M = Zn, Mg) doped with Sm3+","authors":"Nikola Bednarska-Adam , Marta Kuwik , Tomasz Goryczka , Wojciech A. Pisarski , Joanna Pisarska","doi":"10.1016/j.omx.2024.100311","DOIUrl":"10.1016/j.omx.2024.100311","url":null,"abstract":"<div><p>This article investigates the luminescent properties of olivine-type germanate ceramics luminophores doped with trivalent samarium (Sm<sup>3+</sup>) ions, prepared through a solid-state reaction method with two distinct compositions: Li<sub>2</sub>MgGeO<sub>4</sub>:0.5Sm<sup>3+</sup> and Li<sub>2</sub>ZnGeO<sub>4</sub>:0.5Sm<sup>3+</sup>. The emission spectra for germanate systems displayed characteristic bands associated with Sm<sup>3+</sup> ion transitions. The results obtained for the studied ceramic luminophores indicated that orangish-red and red emissions attributed to characteristic 4f-4f transitions of Sm<sup>3+</sup> ions. On the other hand, broad bands assigned directly to the ceramic matrices were registered around 425 nm and 440 nm for Li<sub>2</sub>MgGeO<sub>4</sub>:0.5Sm<sup>3+</sup> and Li<sub>2</sub>ZnGeO<sub>4</sub>:0.5Sm<sup>3+</sup> samples, respectively. The impact of the matrix composition on the emission spectra of samarium-doped olivine-type germanate ceramics has been examined in details.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100311"},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000238/pdfft?md5=8b8563d417975dafe93e1c0c33273d04&pid=1-s2.0-S2590147824000238-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140406783","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}
Laura Wollesen , Paul-Antoine Douissard , Philip Cook , Pavel Loiko , Gurvan Brasse , Jérémie Margueritat , Patrice Camy , Thierry Martin , Christophe Dujardin
{"title":"Growth of ultimate high-density scintillating films for high-resolution X-ray imaging at synchrotrons","authors":"Laura Wollesen , Paul-Antoine Douissard , Philip Cook , Pavel Loiko , Gurvan Brasse , Jérémie Margueritat , Patrice Camy , Thierry Martin , Christophe Dujardin","doi":"10.1016/j.omx.2024.100309","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100309","url":null,"abstract":"<div><p>Scintillators are X-ray to visible light converters applied in X-ray imaging detectors used at synchrotrons. Drastically improved performances of the 4<span><math><msup><mrow></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msup></math></span> generation synchrotron sources enable us to perform X-ray imaging experiments at higher energies. For high spatial resolution X-ray imaging (micrometer to submicrometer), thin scintillating films are required. Consequently, especially for high X-ray energies (30<!--> <!-->keV to 100<!--> <!-->keV), the detection efficiency is limited due to the low X-ray absorption efficiency of the thin films. We have used Liquid Phase Epitaxy (LPE) to grow thin films of one of the ultimate high-density materials, Lu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Hf<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>7</mn></mrow></msub></math></span>:Eu<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span>, which demonstrate scintillating properties and thus combine high spatial resolution and maximized absorption efficiency. X-ray imaging experiments demonstrate that the Modulation Transfer Function (MTF) reaches 10% at 900 lp/mm, and radiographs visually confirm the promising imaging properties. We present structural, luminescent, and scintillation characterization of Lu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Hf<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>7</mn></mrow></msub></math></span>:Eu thin films grown on ZrO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>:Y substrates, showing that the films crystallize in the disordered fluorite structure and the europium ions incorporate into the structure and enhance the luminescence intensity. This contribution is a first step toward developing promising ultra-dense, hafnate-based scintillating screens for high spatial resolution X-ray imaging.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100309"},"PeriodicalIF":0.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000214/pdfft?md5=2c8d51776fdaff8d956a8be2dd605d9e&pid=1-s2.0-S2590147824000214-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140351072","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}
Diaa Atta , Tarek A. Abdel-Halim , Doaa A. Mostafa , Fatma M. Zaher
{"title":"Case study of fluorite mineralization using traditional and laser spectroscopic techniques, homret akarem area south eastern desert, Egypt","authors":"Diaa Atta , Tarek A. Abdel-Halim , Doaa A. Mostafa , Fatma M. Zaher","doi":"10.1016/j.omx.2024.100306","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100306","url":null,"abstract":"<div><p>Green fluorite samples from Homret Akarem, eastern desert Egypt, were investigated by laser-based Raman spectroscopy to study the effect of rare earth elements (REEs) and natural radiation from the surrounding environment on their physico-chemical properties, taking into consideration the geological setting. Geochemical data of trace elements display fluorite enrichment with Y, Pb, Sr, Sn, and other REEs. XRD showed lattice parameters with values higher than those for synthetic fluorite due to the substitution of Ca by Sr and less likely by radiation from U. A considerable shift in the binding energy (BE) for Ca and F obtained from the XPS spectrum indicates that U carried by the hydrothermal solutions formed a discontinuous thin film on the surface of fluorite. Laser-Raman spectroscopy showed strong peaks below 500 cm<sup>−1</sup> and both shallow and weak peaks above 500 cm<sup>−1</sup>. The strong peaks indicate that the substitution of Ca by Sr, point defects, and natural radiation caused by U have a stronger effect on the crystal structure than REEs. Raman spectroscopy supported the initial reports of uranium minerals like Rutherfordine, Kasolite, Soddyite, and Uranophane-alpha.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100306"},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000184/pdfft?md5=fa91e5a0fcf39e9fd8e14b1fe2efd02c&pid=1-s2.0-S2590147824000184-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140122457","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":"Optical and radiation attenuation properties of rare-earth ion doped Li2O–ZnO–B2O3 glasses","authors":"Canel Eke","doi":"10.1016/j.omx.2024.100307","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100307","url":null,"abstract":"<div><p>The role of the addition of rare-earth ions which are Pr<sub>2</sub>O<sub>3</sub>, N<sub>2</sub>O<sub>3</sub>, Sm<sub>2</sub>O<sub>3</sub>, and Eu<sub>2</sub>O<sub>3</sub> to Li<sub>2</sub>O–ZnO–B<sub>2</sub>O<sub>3</sub> glasses on the optical and radiation attenuation characteristics was theoretically investigated. According to the addition of the rare-earth ions, the glasses were named as LZB, LZBPr, LZBNd, LZBSm and LZBEu. The LZB glass has the greatest molar refractivity and the molar polarizability whereas LZBPr glass has the lowest molar refractivity and the molar polarizability. The reflection loss is the highest for the LZB and the optical transmission is the highest for LZBEu. Especially, at higher gamma-ray energy (5–15 MeV), the linear attenuation coefficients are the greatest for LZBPr and they are the lowest for LZB. The LZBPr has the lowest half value layer, tenth value layer and mean free path at 10 MeV gamma-ray energy. At higher gamma-ray energies, LZBPr has the better radiation protection efficiency. Consequently, the LZBPr glass has the superior radiation attenuation ability and the addition of rare-earth ions to LZB glass enhances radiation shielding ability of the studied glasses.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100307"},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000196/pdfft?md5=82b448f741736269cd9623ebffbb6b19&pid=1-s2.0-S2590147824000196-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140122458","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}
Jan Hostaša , Venkatesan Jambunathan , Dariia Chernomorets , Andreana Piancastelli , Chiara Zanelli , Great Chayran , Francesco Picelli , Martin Smrž , Valentina Biasini , Tomáš Mocek , Laura Esposito
{"title":"Effect of Ga3+/Sc3+ on Yb3+ emission in mixed YAG at cryogenic temperatures","authors":"Jan Hostaša , Venkatesan Jambunathan , Dariia Chernomorets , Andreana Piancastelli , Chiara Zanelli , Great Chayran , Francesco Picelli , Martin Smrž , Valentina Biasini , Tomáš Mocek , Laura Esposito","doi":"10.1016/j.omx.2024.100305","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100305","url":null,"abstract":"<div><p>We studied the effect of Ga<sup>3+</sup>and Sc<sup>3+</sup> on Yb:YAG emission at cryogenic temperatures on three different mixed garnets namely Yb:YGAG, Yb:YSAG and Yb:YSGAG. The compositional tuning of these mixed garnets was achieved by preparing ceramic pellets by solid state reaction with different concentration of Ga<sup>3+</sup>, or Sc<sup>3+</sup>, or both. The incorporation of Sc<sup>3+</sup> in Yb:YAG leads only to a limited spectral broadening. On the other hand, the incorporation of either Ga<sup>3+</sup> or both Ga<sup>3+</sup> and Sc<sup>3+</sup> results in a significant spectral broadening. In the latter case, this inhomogeneous broadening is attributed to the mixed occupancy of both Ga<sup>3+</sup> and Sc<sup>3+</sup> in octahedral and tetragonal sites in the crystal lattice leading to a significant distortion in the structure.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100305"},"PeriodicalIF":0.0,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000172/pdfft?md5=b310d7211ce70eb0766ec0c7f9a90f89&pid=1-s2.0-S2590147824000172-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135042","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":"Smart city compatible thin film solar cell based on extraordinary transmission and metallic patch nanoantenna","authors":"Abhishek Pahuja , Sachin Agrawal , Sandeep Kumar , Manoj Singh Parihar , Dinesh Kumar V","doi":"10.1016/j.omx.2024.100304","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100304","url":null,"abstract":"<div><p>An effective performance enhancement model for the thin film solar cell conjointly based on extraordinary transmission and nanoantenna is proposed and investigated. The absorber layer of the extraordinary transmission based solar cell contains a metallic thin film with periodic holes. Maximum extraordinary transmission is accomplished as the metallic film has the same refractive index on both sides. Increased light transmission causes the absorber layer to absorb more light, which increases short circuit current density and subsequently the efficiency of the thin film solar cell. The presented analysis demonstrates that adding a square nano patch on the top surface of the absorber layer can further boost the extraordinary transmission. The extraordinary transmission is increased because of the formation of cavity nanoantenna. Cavity nanoantenna increases the coupling of light into the hole due to the excitation of surface plasmons polaritons. The proposed design of solar cell exhibits around 98% absorption and the short circuit current density is increased by a factor of 3.23. The study has been carried out using finite difference time domain (FDTD) method.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100304"},"PeriodicalIF":0.0,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000160/pdfft?md5=167b5ad6220c5086c3ab23cf31aa7075&pid=1-s2.0-S2590147824000160-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140122459","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}
T.M. Demkiv , YaM. Chornodolskyy , T.M. Muzyka , S.Z. Malynych , R. Ya Serkiz , A.S. Pushak , A. Kotlov , R.V. Gamernyk
{"title":"Effect of Yb doping on the optical and photoelectric properties of CsPbCl3 single crystals","authors":"T.M. Demkiv , YaM. Chornodolskyy , T.M. Muzyka , S.Z. Malynych , R. Ya Serkiz , A.S. Pushak , A. Kotlov , R.V. Gamernyk","doi":"10.1016/j.omx.2024.100303","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100303","url":null,"abstract":"<div><p>In this paper, the effect of Yb dopant on the optical and photoelectric properties of CsPbCl<sub>3</sub>:Yb single crystals is studied. The position of the main energy level of Yb<sup>3+</sup> ions relative to the energy band was determined. Two channels of electron photoionization into the conduction band were identified, which are photo-stimulated transition of valence electrons and transition of electrons from the ground level of the Yb<sup>3+</sup> dopant ion. The crucial role of Yb<sup>2+</sup> ions in the manifestation of the quantum cutting effect was shown. A non-uniform distribution of ytterbium dopant in the CsPbCl<sub>3</sub>:Yb single crystal volume was revealed. It was established that the absolute quantum yield of ytterbium luminescence in CsPbCl<sub>3</sub>:Yb single crystals in the near-infrared region at Yb concentration of 2 mol.% reaches 86%.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100303"},"PeriodicalIF":0.0,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000159/pdfft?md5=c753e5fc4fd8c3ac7745c5a283848f32&pid=1-s2.0-S2590147824000159-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140113961","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}
Diaa Atta , Ahmed Refaat , Adel Ashery , Medhat Ibrahim
{"title":"Graphene oxide: Synthesis and laser spectroscopy approach","authors":"Diaa Atta , Ahmed Refaat , Adel Ashery , Medhat Ibrahim","doi":"10.1016/j.omx.2024.100302","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100302","url":null,"abstract":"<div><p>Nanotechnology research offers advancements in materials and industrial uses such as nano-electronics, medical sciences, fuel, biology, and technological innovation. The most often employed nanomaterial is Graphene oxide (GO), which has been regarded as a dominant progenitor for many specialized industries. The current work aims to establish a new, cost-effective, easy, and straightforward GO synthesis method. Laser spectroscopy and even traditional tools have been utilized for characterization. The prepared GO has been confirmed by XRD and FT-IR spectroscopy. Laser spectroscopy based on confocal microscopes like Raman micro-spectroscopy and fluorescence lifetime imaging microscopy (FLIM) has been used to ensure the synthesis of GO. Also, it could help in the detection of the prepared layer thickness. Raman spectroscopy detects the number of GO layers, which is one on average, while the Raman mapping shows a good distribution of GO on the substrate. Based on excitation with a 445 nm pulsed laser, FLIM shows that mono GO layers cover most of the surface while only a tiny area contains more than a single layer. The novel aspect of this work is the method of preparation and the way of utilizing both FLIM and Raman to detect the number of GO layers. The prepared GO could be used in many applications like solar cells and filtration.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100302"},"PeriodicalIF":0.0,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000147/pdfft?md5=63f2c3b52097b74e36cab6a0374c6faf&pid=1-s2.0-S2590147824000147-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140051805","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":"Improving electrochromic properties of V2O5 smart film through Ti incorporation: Local atomic and electronic perspectives","authors":"I-Han Wu , Arvind Chandrasekar , Kumaravelu Thanigai Arul , Yu-Cheng Huang , Ta Thi Thuy Nga , Chi-Liang Chen , Jeng-Lung Chen , Da-Hua Wei , Kandasami Asokan , Ping-Hung Yeh , Chao-Hung Du , Wu-Ching Chou , Chung-Li Dong","doi":"10.1016/j.omx.2024.100301","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100301","url":null,"abstract":"<div><p>In this work, vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) and titanium-modified V<sub>2</sub>O<sub>5</sub> thin films were synthesized using the sol-gel spin coating route. The effect of Ti-doping concentration on the electrochromic optical properties and atomic/electronic structures of V<sub>2</sub>O<sub>5</sub> smart thin films is examined. As the doping concentration of Ti increases, the surface roughness of the films is reduced. The structure of the films is analyzed using X-ray diffraction (XRD) and Raman spectroscopy, while the electrochromic modulation of atomic and electronic structures is elucidated through Raman and X-ray absorption spectroscopy (XAS) conducted during lithiation and delithiation. The XRD patterns demonstrate that an increase in Ti concentration leads to a more amorphous structure of the films and a shift of the main diffraction peak to a lower angle, attributable to the enlarged spacing between the stacking layers resulting from the incorporation of Ti ions. Soft X-ray absorption spectroscopy (XAS) and in situ hard XAS of the V L-edge, the O K-edge, and the V K-edge revealed a reduction in the charge state of V and local atomic structural symmetry modification upon lithated coloration and delithiated bleaching process. The critical insights provided by in situ XAS provides reveal that a small amount of Ti has the ability to modify the interlayer distance and local atomic structure of V<sub>2</sub>O<sub>5</sub>, thereby improving its electrochromic switching rate and stability when utilized in smart windows.</p></div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"22 ","pages":"Article 100301"},"PeriodicalIF":0.0,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000135/pdfft?md5=5abefa0dd711be0cab990f3688304dd3&pid=1-s2.0-S2590147824000135-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139935871","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}