Pub Date : 2024-09-19DOI: 10.1016/j.optmat.2024.116124
This study demonstrates the enhancement of photoelectric efficiency in dye-sensitized solar cells (DSSCs) using a co-sensitization technique with natural organic dyes. Pigments from Annona squamosa, Malus domestica, and Musa peels were used as co-sensitizers in various ratios to determine the optimal concentration for photon capture. Optical characterization was performed using absorption spectroscopy, while the photovoltaic properties were evaluated through power-voltage (P–V), current density-voltage (J-V), and electrochemical impedance spectroscopy (EIS) analyses. The co-sensitized DSSC with Annona squamosa and Malus domestica dyes achieved the highest power conversion efficiency (PCE) of 1.56 %, compared to 0.95 % and 0.10 % for the individual dyes. These findings underscore the significant efficiency gains achieved through co-sensitization with natural dyes.
{"title":"Enhanced photovoltaic efficiency in dye-sensitized solar cells with natural co-sensitizers from Annona squamosa, Malus domestica and Musa fruits","authors":"","doi":"10.1016/j.optmat.2024.116124","DOIUrl":"10.1016/j.optmat.2024.116124","url":null,"abstract":"<div><div>This study demonstrates the enhancement of photoelectric efficiency in dye-sensitized solar cells (DSSCs) using a co-sensitization technique with natural organic dyes. Pigments from <em>Annona squamosa</em>, <em>Malus domestica</em>, and <em>Musa</em> peels were used as co-sensitizers in various ratios to determine the optimal concentration for photon capture. Optical characterization was performed using absorption spectroscopy, while the photovoltaic properties were evaluated through power-voltage (<em>P–V</em>), current density-voltage (<em>J-V</em>), and electrochemical impedance spectroscopy (EIS) analyses. The co-sensitized DSSC with <em>Annona squamosa</em> and <em>Malus domestica</em> dyes achieved the highest power conversion efficiency (PCE) of 1.56 %, compared to 0.95 % and 0.10 % for the individual dyes. These findings underscore the significant efficiency gains achieved through co-sensitization with natural dyes.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311121","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}
Pub Date : 2024-09-19DOI: 10.1016/j.optmat.2024.116142
The current study is on the deposition of Zinc Sulfide and Cadmium Sulfide thin films by chemical bath deposition (CBD) technique. The deposited films were annealed at 200 °C and 350 °C in vacuum system. The Structural, Surface morphology, elemental composition and Optic analysis were performed by XRD, SEM, EDX, PL and optical transmission spectra. The XRD confirmed the formation of ZnS and CdS which revealed a broad spectrum in the low 2θ region due to its amorphous behaviour. The average optical transmission spectrum of ZnS lies between 65 % and 80 % and CdS lies between 50 and 60 %. The optical band gap of both the annealed films was decreasing with increase in temperature. The higher optical transmittance observed from emission spectra of PL analysis can contribute better performance and proved that the annealed ZnS and CdS thin films are applicable for photovoltaic applications.
{"title":"ZnS and CdS nano thin films – A comprehensive analysis of structural, morphology and optical properties for photovoltaic applications","authors":"","doi":"10.1016/j.optmat.2024.116142","DOIUrl":"10.1016/j.optmat.2024.116142","url":null,"abstract":"<div><div>The current study is on the deposition of Zinc Sulfide and Cadmium Sulfide thin films by chemical bath deposition (CBD) technique. The deposited films were annealed at 200 °C and 350 °C in vacuum system. The Structural, Surface morphology, elemental composition and Optic analysis were performed by XRD, SEM, EDX, PL and optical transmission spectra. The XRD confirmed the formation of ZnS and CdS which revealed a broad spectrum in the low 2θ region due to its amorphous behaviour. The average optical transmission spectrum of ZnS lies between 65 % and 80 % and CdS lies between 50 and 60 %. The optical band gap of both the annealed films was decreasing with increase in temperature. The higher optical transmittance observed from emission spectra of PL analysis can contribute better performance and proved that the annealed ZnS and CdS thin films are applicable for photovoltaic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315204","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}
Pub Date : 2024-09-18DOI: 10.1016/j.optmat.2024.116138
In this work, Indium doped zinc oxide nanoparticles with various molar concentrations were synthesized by solvothermal method. The prepared nanoparticles were analysis using characterization. The structural properties of X-ray diffraction (XRD) used to obtain the hexogonal structure of nanoparticles. The surface morphology of prepared nanoparticles was magnification by Field Emission Scanning Electron Microscope (FESEM), The optical bandgap and functional groups were obtained by Ultra-Violet Visible spectra and Fourier Transform Infrared spectroscopy. Then the fabrication of dye sensitized solar cell based on indium doped ZnO photoanode using cactus dye. The performance of J-V characterization demonstrate a high short-circuit photocurrent density of 2.83 mA/cm2 and open circuit voltage of 0.63with relevant solar cell efficiency of 0.92 % whereas DSSCs made from pure ZnO NPs exhibited a current density of 8.02 mA/cm2 with 0.19 % efficiency. To increase the light-harvesting efficiency, both the photoanode and photons absorption could be optimized and it good response for UV-region. From this reports dye and photoanode are suitable to increase the efficiency of solar cell.
{"title":"Society based photovoltaic application of dye sensitized solar cell of Indium doped ZnO photoanode using cactus fruit via solvothermal method","authors":"","doi":"10.1016/j.optmat.2024.116138","DOIUrl":"10.1016/j.optmat.2024.116138","url":null,"abstract":"<div><div>In this work, Indium doped zinc oxide nanoparticles with various molar concentrations were synthesized by solvothermal method. The prepared nanoparticles were analysis using characterization. The structural properties of X-ray diffraction (XRD) used to obtain the hexogonal structure of nanoparticles. The surface morphology of prepared nanoparticles was magnification by Field Emission Scanning Electron Microscope (FESEM), The optical bandgap and functional groups were obtained by Ultra-Violet Visible spectra and Fourier Transform Infrared spectroscopy. Then the fabrication of dye sensitized solar cell based on indium doped ZnO photoanode using cactus dye. The performance of J-V characterization demonstrate a high short-circuit photocurrent density of 2.83 mA/cm<sup>2</sup> and open circuit voltage of 0.63with relevant solar cell efficiency of 0.92 % whereas DSSCs made from pure ZnO NPs exhibited a current density of 8.02 mA/cm<sup>2</sup> with 0.19 % efficiency. To increase the light-harvesting efficiency, both the photoanode and photons absorption could be optimized and it good response for UV-region. From this reports dye and photoanode are suitable to increase the efficiency of solar cell.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268952","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}
Pub Date : 2024-09-18DOI: 10.1016/j.optmat.2024.116127
Gd3+ co-doping is effective to enhance the photoluminescence of rare earth activators in various host due to energy transfer, however, it is rarely reported via such strategy to regulate persistent luminescence properties. In this work, Gd3+ was co-doped into the SrLaAlO4: Tb persistent luminescence phosphors, and it is found that the photoluminescence and persistent luminescence of the products can be simultaneously improved. The results indicate that as the doping concentration of Gd3+ increases, the particle diameters increase which contributes the increased luminescence. Additionally, an energy transfer process from Gd3+ to Tb3+ ions was observed, which enhances the emission of Tb3+ ions. Furthermore, the persistent luminescence properties of the synthesized phosphors were improved. When the UV light source is turned off, the persistent luminescence of SrLaAlO4: 0.03Tb3+, xGd3+ (x = 0.00–0.97) can last for more than 2 h, which is 100 % enhanced compared to SrLaAlO4: 0.03Tb3+. The trap distribution of SrLaAlO4: 0.03Tb3+, xGd3+ (x = 0.00–0.97) phosphors was analyzed by thermoluminescence. It is found that after the substitution of La3+ with Gd3+, the trap position shifted towards higher temperatures and the trap concentration increased. The initial intensity of the persistent luminescence was also enhanced after Gd3+ co-doping. Based on the experimental findings, the luminescence and persistent luminescence mechanism of SrLaAlO4: 0.03Tb3+, xGd3+ (x = 0.00–0.97) phosphors were described and discussed.
{"title":"Simultaneously enhanced photoluminescence and persistent luminescence in SrLaAlO4: Tb type layered perovskite via Gd3+ codoping","authors":"","doi":"10.1016/j.optmat.2024.116127","DOIUrl":"10.1016/j.optmat.2024.116127","url":null,"abstract":"<div><div>Gd<sup>3+</sup> co-doping is effective to enhance the photoluminescence of rare earth activators in various host due to energy transfer, however, it is rarely reported <em>via</em> such strategy to regulate persistent luminescence properties. In this work, Gd<sup>3+</sup> was co-doped into the SrLaAlO<sub>4</sub>: Tb persistent luminescence phosphors, and it is found that the photoluminescence and persistent luminescence of the products can be simultaneously improved. The results indicate that as the doping concentration of Gd<sup>3+</sup> increases, the particle diameters increase which contributes the increased luminescence. Additionally, an energy transfer process from Gd<sup>3+</sup> to Tb<sup>3+</sup> ions was observed, which enhances the emission of Tb<sup>3+</sup> ions. Furthermore, the persistent luminescence properties of the synthesized phosphors were improved. When the UV light source is turned off, the persistent luminescence of SrLaAlO<sub>4</sub>: 0.03Tb<sup>3+</sup>, <em>x</em>Gd<sup>3+</sup> (<em>x</em> = 0.00–0.97) can last for more than 2 h, which is 100 % enhanced compared to SrLaAlO<sub>4</sub>: 0.03Tb<sup>3+</sup>. The trap distribution of SrLaAlO<sub>4</sub>: 0.03Tb<sup>3+</sup>, <em>x</em>Gd<sup>3+</sup> (<em>x</em> = 0.00–0.97) phosphors was analyzed by thermoluminescence. It is found that after the substitution of La<sup>3+</sup> with Gd<sup>3+</sup>, the trap position shifted towards higher temperatures and the trap concentration increased. The initial intensity of the persistent luminescence was also enhanced after Gd<sup>3+</sup> co-doping. Based on the experimental findings, the luminescence and persistent luminescence mechanism of SrLaAlO<sub>4</sub>: 0.03Tb<sup>3+</sup>, <em>x</em>Gd<sup>3+</sup> (<em>x</em> = 0.00–0.97) phosphors were described and discussed.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311158","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}
Pub Date : 2024-09-18DOI: 10.1016/j.optmat.2024.116119
In this study, we successfully synthesized the perovskite cobaltite Nd0.5Ba0.5CoO3 (NBCO) using the sol-gel method and thoroughly characterized its optical and magnetic properties. Optical measurements, using UV absorption, the Tauc model, and diffuse reflectance spectroscopy (DRS), revealed multiple direct bandgap energies, with the most significant values being 5.23 eV (Tauc method), 5.1 eV (DRS), and 4.9 eV (reflectance). The high bandgap energies highlight NBCO's suitability for UV and optoelectronic applications. The refractive index varied between 2.48 and 3.55, while the Urbach energy was measured at 2.32 eV, indicating a moderate level of localized disorder. Magnetic characterization demonstrated a ferromagnetic-to-paramagnetic transition at 125 K, with strong molecular field effects influencing the exchange interactions. The dielectric analysis revealed an exceptionally low loss factor (tan δ ≈ 0.0012), underscoring NBCO's potential for efficient energy storage and electronic applications. These results show that NBCO offers a unique combination of high optical bandgaps, strong magnetic properties, and low dielectric loss, making it a promising candidate for advanced optoelectronic and magnetic devices.
{"title":"Comprehensive analysis of Nd0.5Ba0.5CoO3 cobaltite: Unveiling electrical, optical and magnetic characteristics for optoelectronic applications","authors":"","doi":"10.1016/j.optmat.2024.116119","DOIUrl":"10.1016/j.optmat.2024.116119","url":null,"abstract":"<div><div>In this study, we successfully synthesized the perovskite cobaltite Nd<sub>0.5</sub>Ba<sub>0.5</sub>CoO<sub>3</sub> (NBCO) using the sol-gel method and thoroughly characterized its optical and magnetic properties. Optical measurements, using UV absorption, the Tauc model, and diffuse reflectance spectroscopy (DRS), revealed multiple direct bandgap energies, with the most significant values being 5.23 eV (Tauc method), 5.1 eV (DRS), and 4.9 eV (reflectance). The high bandgap energies highlight NBCO's suitability for UV and optoelectronic applications. The refractive index varied between 2.48 and 3.55, while the Urbach energy was measured at 2.32 eV, indicating a moderate level of localized disorder. Magnetic characterization demonstrated a ferromagnetic-to-paramagnetic transition at 125 K, with strong molecular field effects influencing the exchange interactions. The dielectric analysis revealed an exceptionally low loss factor (tan δ ≈ 0.0012), underscoring NBCO's potential for efficient energy storage and electronic applications. These results show that NBCO offers a unique combination of high optical bandgaps, strong magnetic properties, and low dielectric loss, making it a promising candidate for advanced optoelectronic and magnetic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311054","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}
Pub Date : 2024-09-18DOI: 10.1016/j.optmat.2024.116139
Polymeric nanocomposites are attracting significant attention due to their ability to facilitate innovative uses. This work investigated the possibility of improving performance by examining the impact of dispersing copper oxide (CuO) and chromium (III) oxide (Cr2O3) nanoparticles in a blend of poly (methyl methacrylate) and polyethylene oxide (PEO) on several properties. UV–visible and photoluminescence spectroscopies were used for optical properties, and FE-SEM was used for surface morphology analysis. The results showed that as the CuO–Cr2O3 percentage increased, the extinction coefficient increased, and indirect band gaps decreased. The photoluminescence properties showed two distinct peaks (dual emission). We measured the AC electrical properties with frequencies ranging from 100 Hz to 5 MHz. The composite's AC conductivity and dielectric loss increased significantly at high frequencies (higher than 2 MHz). The dielectric constant is nearly frequency-independent and increases as the concentration of nanoparticles increases. We used a DC plasma sputtering facility to treat the nanocomposites with argon plasma at a pressure of 0.12 mBar for 7 min. We analyzed the films' properties before and after plasma treatment, observing a significant impact on nanocomposite-incorporated nanoparticles. After plasma treatment, the band gap decreased from 5.05 eV to 4.8 eV for the lowest concentration of CuO + Cr2O3 (1.5 wt%) and from 3.55 eV to 2.47 eV for the highest concentration of CuO + Cr2O3 (6 wt%). The changes ranged from 0.25 to 1.08 eV. The films possess features that render them suitable for high-frequency optoelectronic devices as well as optical applications such as emission filters and UV shielding.
{"title":"Synthesizing, characterizing, and cold plasma treating of Cr2O3/CuO nanomaterials doped PMMA/PEO for flexible optoelectronic applications","authors":"","doi":"10.1016/j.optmat.2024.116139","DOIUrl":"10.1016/j.optmat.2024.116139","url":null,"abstract":"<div><div>Polymeric nanocomposites are attracting significant attention due to their ability to facilitate innovative uses. This work investigated the possibility of improving performance by examining the impact of dispersing copper oxide (CuO) and chromium (III) oxide (Cr<sub>2</sub>O<sub>3</sub>) nanoparticles in a blend of poly (methyl methacrylate) and polyethylene oxide (PEO) on several properties. UV–visible and photoluminescence spectroscopies were used for optical properties, and FE-SEM was used for surface morphology analysis. The results showed that as the CuO–Cr<sub>2</sub>O<sub>3</sub> percentage increased, the extinction coefficient increased, and indirect band gaps decreased. The photoluminescence properties showed two distinct peaks (dual emission). We measured the AC electrical properties with frequencies ranging from 100 Hz to 5 MHz. The composite's AC conductivity and dielectric loss increased significantly at high frequencies (higher than 2 MHz). The dielectric constant is nearly frequency-independent and increases as the concentration of nanoparticles increases. We used a DC plasma sputtering facility to treat the nanocomposites with argon plasma at a pressure of 0.12 mBar for 7 min. We analyzed the films' properties before and after plasma treatment, observing a significant impact on nanocomposite-incorporated nanoparticles. After plasma treatment, the band gap decreased from 5.05 eV to 4.8 eV for the lowest concentration of CuO + Cr<sub>2</sub>O<sub>3</sub> (1.5 wt%) and from 3.55 eV to 2.47 eV for the highest concentration of CuO + Cr<sub>2</sub>O<sub>3</sub> (6 wt%). The changes ranged from 0.25 to 1.08 eV. The films possess features that render them suitable for high-frequency optoelectronic devices as well as optical applications such as emission filters and UV shielding.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311124","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}
Pub Date : 2024-09-17DOI: 10.1016/j.optmat.2024.116134
Rare-earth-free Sr(Ca)2Ga2GeO7 phosphors exhibiting self-activated luminescence properties were synthesized by solid-state method. The incorporation of Ca in place of Sr resulted in a pronounced redshift in the emission spectrum, enabling a closer alignment with the absorption spectrum of chlorophyll. This advancement offers increased flexibility in designing blue LEDs optimized for diverse crop growth applications.
通过固态方法合成了具有自激活发光特性的无稀土 Sr(Ca)2Ga2GeO7 荧光粉。用 Ca 取代 Sr 后，发射光谱发生了明显的红移，从而更接近叶绿素的吸收光谱。这一进步提高了设计蓝光 LED 的灵活性，优化了其在各种作物生长应用中的性能。
{"title":"Rare-earth-free Sr(Ca)2Ga2GeO7 phosphors with Ca-substitution-induced red-shift emission, perfectly aligned for Chlorophyll's absorption","authors":"","doi":"10.1016/j.optmat.2024.116134","DOIUrl":"10.1016/j.optmat.2024.116134","url":null,"abstract":"<div><p>Rare-earth-free Sr(Ca)<sub>2</sub>Ga<sub>2</sub>GeO<sub>7</sub> phosphors exhibiting self-activated luminescence properties were synthesized by solid-state method. The incorporation of Ca in place of Sr resulted in a pronounced redshift in the emission spectrum, enabling a closer alignment with the absorption spectrum of chlorophyll. This advancement offers increased flexibility in designing blue LEDs optimized for diverse crop growth applications.</p></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238465","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}
Pub Date : 2024-09-17DOI: 10.1016/j.optmat.2024.116130
All-inorganic zero-dimensional (0D) metal halide perovskite materials have been widely studied in solid-state lighting due to their unique optical properties. However, there are few researchs on their potential applications in X-ray imaging. Herein, we synthesized an all-inorganic 0D metal halide perovskite scintillator, Cs2ScCl5·H2O:Tb3+, was prepared by using a hydrothermal method. Upon 240 nm excitation, the emission spectrum of Cs2ScCl5·H2O:Tb3+ is primarily composed of characteristic emissions from Tb3+, with the strongest emission peak at 548 nm. Additionally, under X-ray excitation, it exhibits blue light showing an intense emission band centered at 425 nm due to self-trapped (STE) emission, and a rather weaker green emission caused by energy transfer from STE emission to Tb3+ ions. Based on this, a flexible film prepared by using the as-obtained scintillator Cs2ScCl5·H2O:Tb3+ demonstrates real-time X-ray imaging with a resolution of 9.5 lp mm−1. These results suggest the potential application prospect of Cs2ScCl5·H2O:Tb3+ in X-ray detection and imaging.
全无机零维（0D）金属卤化物包晶材料因其独特的光学特性，已在固态照明领域得到广泛研究。然而，有关其在 X 射线成像中潜在应用的研究却很少。在此，我们采用水热法合成了一种全无机 0D 金属卤化物闪烁体 Cs2ScCl5-H2O:Tb3+。在 240 纳米波长的激发下，Cs2ScCl5-H2O:Tb3+ 的发射光谱主要由 Tb3+ 的特征发射组成，在 548 纳米波长处发射峰最强。此外，在 X 射线激发下，由于自俘获（STE）发射，Cs2ScCl5-H2O:Tb3+ 发出的蓝光显示出以 425 纳米为中心的强烈发射带，而 STE 发射到 Tb3+ 离子的能量转移则产生了较弱的绿色发射。在此基础上，利用已获得的闪烁体 Cs2ScCl5-H2O:Tb3+ 制备的柔性薄膜可进行实时 X 射线成像，分辨率达 9.5 lp mm-1。这些结果表明，Cs2ScCl5-H2O:Tb3+ 在 X 射线探测和成像方面具有潜在的应用前景。
{"title":"Tb3+-doped a zero-dimensional all-inorganic metal halide perovskite scintillator Cs2ScCl5·H2O for X-ray imaging","authors":"","doi":"10.1016/j.optmat.2024.116130","DOIUrl":"10.1016/j.optmat.2024.116130","url":null,"abstract":"<div><div>All-inorganic zero-dimensional (0D) metal halide perovskite materials have been widely studied in solid-state lighting due to their unique optical properties. However, there are few researchs on their potential applications in X-ray imaging. Herein, we synthesized an all-inorganic 0D metal halide perovskite scintillator, Cs<sub>2</sub>ScCl<sub>5</sub>·H<sub>2</sub>O:Tb<sup>3+</sup>, was prepared by using a hydrothermal method. Upon 240 nm excitation, the emission spectrum of Cs<sub>2</sub>ScCl<sub>5</sub>·H<sub>2</sub>O:Tb<sup>3+</sup> is primarily composed of characteristic emissions from Tb<sup>3+</sup>, with the strongest emission peak at 548 nm. Additionally, under X-ray excitation, it exhibits blue light showing an intense emission band centered at 425 nm due to self-trapped (STE) emission, and a rather weaker green emission caused by energy transfer from STE emission to Tb<sup>3+</sup> ions. Based on this, a flexible film prepared by using the as-obtained scintillator Cs<sub>2</sub>ScCl<sub>5</sub>·H<sub>2</sub>O:Tb<sup>3+</sup> demonstrates real-time X-ray imaging with a resolution of 9.5 lp mm<sup>−1</sup>. These results suggest the potential application prospect of Cs<sub>2</sub>ScCl<sub>5</sub>·H<sub>2</sub>O:Tb<sup>3+</sup> in X-ray detection and imaging.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311156","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}
Pub Date : 2024-09-17DOI: 10.1016/j.optmat.2024.116137
This article proposes a lithography-free technique to fabricate Au NPs on glass substrates using multiple solid-state dewetting (SSD) of sputtered Au ultra-thin films for LSPR sensor chip applications. We studied the influence of initial film thickness and the number of repeated process cycles on the morphology and LSPR sensing performance. This fabrication process allowed control over particle size, gap spacing, and density of the Au NPs, which influenced the LSPR peak position as observed using field emission scanning electron microscopy (FE-SEM) and UV–Vis–NIR spectrophotometry. To demonstrate LSPR sensing performance, the refractive index (RI) sensitivity was evaluated by measuring the wavelength shift of the LSPR peak in a series of glycerol/phosphate-buffered saline (PBS) mixtures, varying the refractive index from 1.33909 to 1.37409. The results showed that RI sensitivity and the figure of merit (FOM) for all prepared samples ranged from 37.191 ± 12.26–73.592 ± 9.70 and 0.35 ± 0.12–0.75 ± 0.02, respectively. An increase in repeated process cycles tended to decrease RI sensitivity and FOM. The best LSPR performance was achieved with an 8 nm initial film thickness after the first cycle, with an RI sensitivity of 70.937 ± 2.60 and an FOM of 0.75 ± 0.02, attributed to optimal Au size and density. Additionally, the binding efficiency response to human IgG with high regeneration cycles was demonstrated, highlighting the potential for biosensor applications.
{"title":"A study of multiple solid-state dewetting of sputtered Au ultra-thin films for chip-based LSPR sensor applications","authors":"","doi":"10.1016/j.optmat.2024.116137","DOIUrl":"10.1016/j.optmat.2024.116137","url":null,"abstract":"<div><div>This article proposes a lithography-free technique to fabricate Au NPs on glass substrates using multiple solid-state dewetting (SSD) of sputtered Au ultra-thin films for LSPR sensor chip applications. We studied the influence of initial film thickness and the number of repeated process cycles on the morphology and LSPR sensing performance. This fabrication process allowed control over particle size, gap spacing, and density of the Au NPs, which influenced the LSPR peak position as observed using field emission scanning electron microscopy (FE-SEM) and UV–Vis–NIR spectrophotometry. To demonstrate LSPR sensing performance, the refractive index (RI) sensitivity was evaluated by measuring the wavelength shift of the LSPR peak in a series of glycerol/phosphate-buffered saline (PBS) mixtures, varying the refractive index from 1.33909 to 1.37409. The results showed that RI sensitivity and the figure of merit (FOM) for all prepared samples ranged from 37.191 ± 12.26–73.592 ± 9.70 and 0.35 ± 0.12–0.75 ± 0.02, respectively. An increase in repeated process cycles tended to decrease RI sensitivity and FOM. The best LSPR performance was achieved with an 8 nm initial film thickness after the first cycle, with an RI sensitivity of 70.937 ± 2.60 and an FOM of 0.75 ± 0.02, attributed to optimal Au size and density. Additionally, the binding efficiency response to human IgG with high regeneration cycles was demonstrated, highlighting the potential for biosensor applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254057","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}
Pub Date : 2024-09-17DOI: 10.1016/j.optmat.2024.116120
Diving into the forefront of polymer light-emitting diodes (PLEDs), this study pioneers the synthesis of PEDOT:PSS-ZnS composite films on ITO surfaces, achieving remarkable advancements in charge transfer efficiency. Through meticulous optimization, these films exhibit extraordinary electrical conductivity (133 S/cm), specific capacitance (74.75 F/g), and hole mobility (132.56 cm/Vs), supported by a finely tuned HOMO energy (−5.02 eV) and work function (5.02 eV). The resultant heightened optical conductivity promises unparallelled performance in the crucial role of hole transport layers (HTLs) within PLEDs. Further analysis unveils an impressive quantum efficiency (QE) of 28% and fluorescence resonance energy transfer (FRET) efficiency of 52%, underscoring the exceptional HTL characteristics. This breakthrough heralds PEDOT:PSS-ZnS composites as game-changers in crafting high-efficiency HTLs for PLEDs, seamlessly merging advanced optical, electrical, and electrochemical properties. The implications extend far beyond, illuminating a pathway towards transformative advancements in display and lighting technologies, destined to redefine the future of illumination.
{"title":"Highly conductive composites of PEDOT:PSS-ZnS thin film for improved hole mobility in polymer devices","authors":"","doi":"10.1016/j.optmat.2024.116120","DOIUrl":"10.1016/j.optmat.2024.116120","url":null,"abstract":"<div><p>Diving into the forefront of polymer light-emitting diodes (PLEDs), this study pioneers the synthesis of PEDOT:PSS-ZnS composite films on ITO surfaces, achieving remarkable advancements in charge transfer efficiency. Through meticulous optimization, these films exhibit extraordinary electrical conductivity (133 S/cm), specific capacitance (74.75 F/g), and hole mobility (132.56 cm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span>/Vs), supported by a finely tuned HOMO energy (−5.02 eV) and work function (5.02 eV). The resultant heightened optical conductivity promises unparallelled performance in the crucial role of hole transport layers (HTLs) within PLEDs. Further analysis unveils an impressive quantum efficiency (QE) of 28% and fluorescence resonance energy transfer (FRET) efficiency of 52%, underscoring the exceptional HTL characteristics. This breakthrough heralds PEDOT:PSS-ZnS composites as game-changers in crafting high-efficiency HTLs for PLEDs, seamlessly merging advanced optical, electrical, and electrochemical properties. The implications extend far beyond, illuminating a pathway towards transformative advancements in display and lighting technologies, destined to redefine the future of illumination.</p></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238461","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号