Optical Materials最新文献

{"title":"Optical properties and thermal sensitivity of AgInS2 and AgInS2/ZnS quantum dots embedded in barium sulphate and calcium carbonate matrices","authors":"Yuliana Yosypenko ,&nbsp;Vasyl Mykhailovych ,&nbsp;Vladyslav Yosypenko ,&nbsp;Aurelian Rotaru ,&nbsp;Yuriy Khalavka","doi":"10.1016/j.optmat.2024.116441","DOIUrl":"10.1016/j.optmat.2024.116441","url":null,"abstract":"<div><div>Quantum dots of AgInS₂ and AgInS₂ doped with ZnS were embedded in microscale spherical BaSO₄ and CaCO₃ matrices by co-precipitation approach. Energy dispersive X-ray analysis (EDX) confirmed the homogeneous distribution of quantum dots within the matrices. The effect of encapsulation on the optical properties of quantum dots (QDs) and the dependence of photoluminescence (PL) spectra on temperature were investigated. The similar appearance of the spectra and the same position of the emission maximum for the composites with BaSO₄ and CaCO₃ indicate that the nature of the matrix does not significantly affect the spectral characteristics of quantum dots. While the application of composites based on CaCO₃ at high temperatures is limited due to the degradation, composites with BaSO₄ demonstrate high stability and thermal sensitivity (1.89 ± 0.0012 %/K). Therefore, the composites we studied are well-suited for light conversion and optical temperature sensing applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116441"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724116","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":"Photo-and electroluminescent properties of mixed ligand zinc complexes for organic electroluminescent device applications","authors":"P.H. Amith Nayak ,&nbsp;Areej Al Bahir ,&nbsp;Albandary Almahir ,&nbsp;B.M. Basavaraja Patel ,&nbsp;H.S.Bhojya Naik ,&nbsp;Lubna Afroz ,&nbsp;Anees Fathima","doi":"10.1016/j.optmat.2024.116444","DOIUrl":"10.1016/j.optmat.2024.116444","url":null,"abstract":"<div><div>Two Schiff base mixed ligand 4-[(N(2-hydroxy-1-naphthalidene)amino)antipyrine]zinc and 1,10 phenanthroline mixed ligand Schiff base zinc complexes were synthesized and characterized using ¹H and ¹³C NMR, mass spectroscopy, elemental analysis, IR and UV–vis spectra. The thermal stability of compounds was characterized by TGA and its glass transition temperature was determined by the DSC method. Photoluminescence spectra show the emission peaks of both complexes lie in the 450–550 nm blue-green region. These two zinc complexes were used as a dopant material for mixed host materials with a concentration of 8 %. A series of devices having mixed host materials (mCP_x:TPBI_1-x) with the concentration of x = 0,1/4,1/2 and 3/4 have been developed. The concentration of both host materials was equal. The maximum luminance, current and power efficiency of the devices with zinc complex Zn(L) can reach up to 5516 cd/m², 4.4 cd/A and 3.52 lm/W which are improved by introducing phenanthroline mixed ligand in the zinc complex Zn(phen). These results show that by changing the concentration of host material and introducing mixed ligand in the zinc complex can broaden the recombination zone and also balance the charge carrier in the emissive layer.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116444"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748121","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":"Activation of Tm3+ single-photon NIR-to-NIR upconversion luminescence through Yb3+ doping in Tm2WO6 phosphor","authors":"Govind B. Nair,&nbsp;H.C. Swart,&nbsp;Rajagopalan Krishnan","doi":"10.1016/j.optmat.2024.116459","DOIUrl":"10.1016/j.optmat.2024.116459","url":null,"abstract":"<div><div>Ceramic phosphors Tm_2-xWO₆:xYb³⁺ synthesized by solid-state reaction method. The up-conversion (UC) dynamics in the Yb³⁺-doped Tm₂WO₆ phosphor were investigated, which demonstrated a single-photon UC process from a near-infrared (NIR) excitation at 980 nm to an NIR emission corresponding to the ³H₄ → ³H₆ transition of Tm³⁺. X-ray photoelectron spectra confirmed the chemical states of the constituent elements. The diffuse reflectance spectra confirmed that Tm₂WO₆ requires doping with Yb³⁺ ions in order to be able to absorb the energy at 980 nm. UC emission properties of the phosphors depend on the Yb³⁺ ion concentration. NIR emission of Tm³⁺ is much stronger than visible emissions when Yb³⁺ doping. The NIR and red emissions were caused by a single-photon UC process, whereas the blue emission was caused by a two-photon process. The temperature-dependent UCL showed an initial rise in the UC intensity and then a consistent decrease with the variation in temperature.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116459"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724053","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":"Influence of H2 and O2 introduction during sputtering on In2O3-based transparent conductive films and HJT solar cells with copper electrode","authors":"Guiming Meng ,&nbsp;Guanghong Wang ,&nbsp;Yuanbo Gong ,&nbsp;Chenyu Zhu ,&nbsp;Xiaoxia Zhao ,&nbsp;Jingxuan Zhou ,&nbsp;Caixia Wang ,&nbsp;Shengzhi Xu ,&nbsp;Hongbo Tian ,&nbsp;Wei Wang ,&nbsp;Lei Zhao ,&nbsp;Ying Zhao ,&nbsp;Xiaodan Zhang","doi":"10.1016/j.optmat.2024.116452","DOIUrl":"10.1016/j.optmat.2024.116452","url":null,"abstract":"<div><div>The SnO₂-doped In₂O₃ (ITO) films with doping ratio of 90:10 and 97:3 and Zr, Ti and Ga-doped In₂O₃ film (IXO) were prepared by DC magnetron sputtering. Hydrogen showed the different effect on properties of various In₂O₃-based transparent conductive oxide film (TCO). It enhanced the (222) preferential orientation growth of TCO films. The highest carrier mobility of the IXO films was 73.7 cm²/Vs. The lowest resistivity of the ITO (90:10 wt%) was 2.6x10⁻⁴ Ω cm. The average transmittance of the ITO (90:10 wt%) was as high as 93.6 % under specific oxygen content in the wavelength range of 400–1100 nm. The optimized TCO films were selectively applied as the electrodes of the silicon heterojunction (HJT) solar cells. The highest conversion efficiency was 24.803 %. This work clarified the effect of oxygen and hydrogen content on the TCO films, which offers a valid guidance to prepare the high-efficiency HJT solar cells.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116452"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724120","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":"The impact of green chemistry to synthesize PVA/cobalt metal complexes (CoMCs) composites with enhanced optical behavior","authors":"Dana S. Muhammad ,&nbsp;Dara M. Aziz ,&nbsp;Shujahadeen B. Aziz","doi":"10.1016/j.optmat.2024.116448","DOIUrl":"10.1016/j.optmat.2024.116448","url":null,"abstract":"<div><div>This study focuses on the preparation of amorphous polymer composites with an indirect band gap, which are essential for advancing optoelectronic devices. We synthesized cobalt metal complexes (CoMCs) by combining an aqueous solution of cobalt (II) acetate with green tea dye (GTD) at 70 °C, utilizing a cost-effective and environmentally friendly approach. Polyvinyl alcohol (PVA) was integrated with the synthesized CoMCs using a solution cast method at ambient temperature. The resulting CoMCs and PVA-based composite films were characterized through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV–Vis spectroscopy. FTIR analysis provided insights into the functional groups of GTD and their role in CoMC formation, highlighting the innovative green coordination chemistry method for low-cost metal complex production. The interactions between PVA and CoMCs were confirmed by FTIR, while the optical properties demonstrated that green-synthesized metal complexes combined with polar polymers offer a novel approach to enhance absorption behavior and reduce the optical band gap. XRD analysis indicated an increase in the amorphous phase, and Urbach energy values confirmed a reduction in crystallinity. The Wemple-DiDomenico (W-D) model was employed to determine the optical parameters, including the band gap energy (<em>E</em>_<em>g</em>), which decreased from 6.05 eV to 1.5 eV with the addition of 36 mL of CoMCs. Furthermore, the optical dielectric function analysis provided important parameters such as effective mass (<em>N/m∗</em>), relaxation time (<em>τ</em>), plasma frequency (<em>ω</em>_<em>p</em>), optical mobility (<em>μ</em>_<em>opt</em>), and optical resistivity (<em>ρ</em>_<em>opt</em>). We also evaluated sheet resistance (<em>Rs</em>), thermal emissivity (ɛ_<em>Th</em>), and figure of merit (<em>φ</em>) for both pure and doped PVA films, with notable peaks in the figure of merit plots shifting to higher wavelengths as CoMCs concentration increased. This work demonstrates the effectiveness of multiple models and methodologies in accurately determining the optical band gap, emphasizing its significance for photonics and optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116448"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724132","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 ultrafast nonlinear optical response in Bi-doped ZnO glass-ceramics","authors":"Muhammad Aamir Iqbal ,&nbsp;Yujia Zhai ,&nbsp;Pengyun Wang ,&nbsp;Jianrong Qiu ,&nbsp;Xiaofeng Liu","doi":"10.1016/j.optmat.2024.116447","DOIUrl":"10.1016/j.optmat.2024.116447","url":null,"abstract":"<div><div>Incorporating plasmonic nanocrystals (NCs) into solid-state electronics is an important step toward realizing nanophotonic devices. However, only a few noble metal-based systems can directly precipitate plasmonic NCs in a solid transparent medium. In contrast, plasmonic metal oxide NCs can exhibit a plasmonic response at infrared energies that noble metal-based systems cannot reach due to their high carrier concentration. Here we demonstrate the precipitation of bismuth-doped ZnO (BZO) NCs in an aluminosilicate glass matrix, demonstrating a robust near-infrared (NIR)-localized surface plasmon resonance. Benefited from the strong resonant absorption by the plasmonic BZO NCs, these glass ceramics (GCs) exhibit enhanced ultrafast nonlinear optical (NLO) response across the NIR optical communication bands, which might be promising for applications such as optical limiting, optical switching, optical modulation, and NIR-nanophotonic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116447"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724124","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":"Modified fluorozirconate glasses doped with 4f- and 3d-cations","authors":"Maria N. Brekhovskikh ,&nbsp;Liudmila V. Moiseeva ,&nbsp;Sergey Kh. Batygov ,&nbsp;Valeria V. Vinokurova ,&nbsp;Leonid A. Vaimugin ,&nbsp;Natalia Y. Kirikova ,&nbsp;Valentin A. Kondratyuk ,&nbsp;Vladimir N. Makhov","doi":"10.1016/j.optmat.2024.116456","DOIUrl":"10.1016/j.optmat.2024.116456","url":null,"abstract":"<div><div>Fluoride glasses remain to be an attractive material for thirty years for optical applications lying in the visible and mid IR spectral range due to their low phonon energy (∼500-600 cm⁻¹) and as a unique matrix for introducing rare earth activators. Modern materials science studies in the area of fluoride glasses are aimed at searching for the new modified compositions of these glasses with high optical homogeneity with the purpose of creating efficient active optical media in a wide spectral range. By modifying the composition of the glasses one can control the thermal, optical and spectroscopic properties for various applications. The information on glass-formation in the fluorozirconate system ZBLAN (ZrF₄–BaF₂–LaF₃–AlF₃–NaF) modified with “heavier” cations and anions, their physico-chemical and optical properties and areas of applications is presented in this review. Promising directions of practical application of such materials, doped with 4f- and 3d-cations in optoelectronics are discussed.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116456"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724030","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":"Boosting the optoelectronic properties of V2O5 thin films by Fe3+ doping for photodetector applications","authors":"S.L. Jenish ,&nbsp;S. Valanarasu ,&nbsp;I. Loyola Poul Raj ,&nbsp;A. Vimala Juliet ,&nbsp;R.S. Rimal Isaac ,&nbsp;V. Ganesh","doi":"10.1016/j.optmat.2024.116429","DOIUrl":"10.1016/j.optmat.2024.116429","url":null,"abstract":"<div><div>Prevailing the demands of UV optoelectronics gadgets with improved efficiency and low-cost fabrication in this commercial and competitive world, we at this moment report an improved photo response capabilities of V₂O₅ thin films by incorporating Fe content of (0, 1, 2, 3, 4 and 5 wt%) over the glass substrates using nebulizer assisted spray pyrolysis technique. The X-ray diffraction (XRD) analysis authenticates the existence of an orthorhombic crystal structure with an intense peak along (010) plane. The FESEM reveals the morphology of tubular nano rod-like structures with a porous nature for all the V₂O₅ samples. The presence of compositional elements in the samples was evident by EDX analysis. UV spectral studies show that the bandgap varies from 2.41 eV to 2.1 eV. The PL spectra exemplify the existence of violet emission at 475 nm. The performance of the UV photodetector was analyzed in terms of parameters like Responsivity, Detectivity and External Quantum Efficiency and is observed to be maximum for 3 % Fe doped V₂O₅ (R = 46.4 × 10⁻²AW⁻¹, D∗ = 4.26 × 10¹⁰Jones and EQE = 150 %).</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116429"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723750","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":"Sol-gel synthesis of magnesium doped TiO2 thin film and its application in dye sensitized solar cell","authors":"Yameng Zhang ,&nbsp;Hong Tao ,&nbsp;Haoning Wang ,&nbsp;Jiayuan Hao ,&nbsp;Yuxuan Liu ,&nbsp;Ye Yuan","doi":"10.1016/j.optmat.2024.116446","DOIUrl":"10.1016/j.optmat.2024.116446","url":null,"abstract":"<div><div>Electron transport layer plays an important role on promoting electron transport and retarding electron recombination in photoelectric device. In this work, magnesium (Mg) doped titanium dioxide (TiO₂) thin film was successfully prepared by the modified sol-gel method. The atomic ratio of Mg atoms to Ti atoms was adjusted to change the light transmittance, band gap and photoelectric performance of TiO₂ thin film. In addition, Mg doped TiO₂ thin film was applied as the compact layer in dye sensitized solar cell (DSSC). The results indicate that the decreased proportion of non-lattice oxygen and the adjusted energy band structure show significant effect on generating more photoelectrons and reducing recombination losses in DSSC. Furthermore, the analysis results of electrochemical impedance spectroscopy (EIS) and open-circuit voltage decay (OCVD) reveal that DSSC based on 15 mol% Mg doped TiO₂ compact layer shows the smallest electron transport impedance and the longest electron lifetime. Therefore, DSSC based on 15 mol% Mg doped TiO₂ compact layer obtains the highest photoelectric conversion efficiency (PCE) of 7.843 %, which is 17.66 % higher than that based on pure TiO₂ compact layer. The prepared smooth and compact Mg doped TiO₂ thin film in this work can also be applied to other thin film optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116446"},"PeriodicalIF":3.8,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723744","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":"Luminescence improvement via site environment adjustment and site occupancy regulation of Eu2+ in Ca8MgSi4O16Cl2","authors":"Xiao Guo,&nbsp;Xiaoliang Yang,&nbsp;Siguo Xiao","doi":"10.1016/j.optmat.2024.116442","DOIUrl":"10.1016/j.optmat.2024.116442","url":null,"abstract":"<div><div>Phosphors emitting cyan-green light with a small Stokes shift under blue light excitation is crucial for addressing spectral deficiencies in phosphor-converted white light-emitting diodes (pc-wLEDs). In this work, a series of Mg²⁺ ion doped and Mg²⁺-Th³⁺ (Th<img>Ga,In) ion pair co-doped Ca₈MgSi₄O₁₆Cl₂: Eu²⁺ phosphors were synthesized using a high-temperature solid-phase reaction method. It is found that the doped Mg²⁺ ions can improve the local environment of Eu²⁺ ions thus enhance its luminescence, while the doped Th³⁺ (Th<img>Ga,In) can regulate the distribution of Eu²⁺ ions occupying hexa-coordinated and octa-coordinated Ca²⁺ sites. It is proven that co-doping Mg²⁺-Ga³⁺ ion pair facilitates more Eu²⁺ ions enter the octa-coordinated Ca²⁺ sites, which largely enhances the cyan-green emission intensity. A pc-wLEDs device with a color rendering index (CRI) of 97.2 and a correlated color temperature (CCT) of 3480K has been fabricated combining the present Ca₇Ga_0.9Mg_1.9Si₃_.₁O₁₆Cl₂:0.1Eu²⁺ phosphor, commercial yellow and red phosphors with blue LED chip. It is found that Ca₇Ga_0.9Mg_1.9Si_3.1O₁₆Cl₂:0.1Eu²⁺ phosphor can partially fill the cyan gap of the pc-wLEDs spectra, enhancing the emission quality of the pc-wLEDs device.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116442"},"PeriodicalIF":3.8,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723747","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}