CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yang,Kun Ge,Huiyun Ban,Huiping Yuan,Sen Qian,Zhehao Hua,Hua Cai,Danping Chen,Jifeng Han,Xvsheng Qiao,Jing Ren,Xinyuan Sun,Gao Tang,Shenghua Yin,Minghui Zhang,Jiawen Xiao
A series of Ce 3+ -doped Gd 2 O 3 -GdF 3 -Al 2 O 3 -B 2 O 3 -SiO 2 glass scintillators (GSC x and GLC x ) were successfully synthesized in reducing atmosphere for future imaging application. The transmittance of GSC x glasses exceeds 85 % in range of 500–800 nm, and the cut-off edge red shifts as the Ce 3+ concentration increases. In photoluminescence (PL), GSC x glass scintillators have a 360–600 nm broadband emission with a shoulder peak at around 450 nm. Meanwhile, the PL lifetime of GSC x glasses is close to the CeF 3 crystals, and the PL QY of GSC 3 glass scintillator reaches up 70.2 %. For scintillation application, the integral XEL intensity of GSC 2 and GSC 3 glasses is 31.3 % and 24.4 % of that of BGO crystal. GLC 2 and GLC 3 glasses exhibit similar spatial resolution of approximately 7 lp·mm −1 . Moreover, the light yields of GSC 2 and GSC 3 glass scintillator are 1702 and 1690 ph/MeV excited by γ-ray, respectively. The nonproportionality of GSC x glasses is less than 3 % in the range of 100–1400 keV due to the large density and Z eff . As Ce 3+ concentration increases, both the fast and slow components of the glasses decrease (103.7 ns–89.7 ns, 1454.4 ns–1012.8 ns), and the proportion of fast component also increased from 3.3 % to 4.7 %. For γ-ray imaging, the scintillation light events of the glass can be observed from SiPM array, and the central position (−2, −1) have the highest count rate of the system. The results show that GSCx and GLCx glass scintillators deserve further development for future applications.
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ACS Applied Optical Materials
·
2025
·
IF 3.8
Feifei Qin,Yue Cao,Chengwei Wang,Guogang Zhang,Xiaoxuan Wang,Feng Chen,Gangyi Zhu,Yongjin Wang
Nowadays, most solid-state lighting-based visible light communication (VLC) technology suffers from the color converter’s short optical bandwidth or low stability. Herein, we fabricated MAPbBr3@PbBr(OH) nanocrystals (NCs) with high optical bandwidth and water-stable properties for color conversion of VLC and a white light-emitting diode (LED) system. The sample’s characteristic photoluminescence (PL) spectrum is green emission peaked near 529 nm. As a color converter, it has a high bandwidth capacity for devices. The sample indicates internal quantum efficiency (IQE) of about 38.33% and a PL decay time of about 5.5 ns, and it can maintain its PL properties in water for over 90 days The calculated optical bandwidth is about 49.4 MHz. Its measured −3 dB bandwidth with a 405 nm laser diode can reach 25 MHz with a data rate over 50 Mbps. More interestingly, the perovskite NCs can replace the green phosphor to build a high-speed and multicolor LED, and the −3 dB bandwidth can be maintained at over 80% in this case. These features are far beyond the abilities of commercial green phosphors. Finally, we demonstrate an underwater text transmission system with a 405 nm LED, perovskite color conversion layer, and low-cost silicon-based photodetector.
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OPTICAL ENGINEERING
·
2025
·
IF 1.2
Xianzhen Huang,Yun Ye,Jiaqi Gao,Xingke Zheng
Color conversion layers are extensively utilized in flat panel display technology for their capacity to provide a wide color gamut and improved resolution, along with exceptional design flexibility. The uniformity and thickness of cadmium selenide (CdSe) quantum dot (QD) films are often difficult to control in the preparation of color conversion layers. Interestingly, it is possible to precisely deposit QDs by inkjet printing to improve material utilization. Color conversion layers with optimized spectral properties and light conversion efficiency are successfully prepared by inkjet printing. We employ inkjet printing technology to fabricate CdSe QD color conversion layers with precise control over layer thickness. The effects of layer thickness on spectral properties and light conversion efficiency are systematically investigated. It is found that a layer thickness of 5.5 μm achieves the highest light conversion efficiency at 20.4%, with efficiency decreasing as thickness increases to 6 μm. In addition, it is observed that blue light transmittance decreases from 47.2% to 11.4% with increasing layer thickness, highlighting the importance of thickness control in optimizing spectral properties.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 5
·1-9
·
IF 2.8
Liao Gengcheng,Huang Zongyu,Ren Long,Qi Xiang
Directly growing oxides on the surface of liquid metal (LM) offers a novel strategy to effectively integrate flexible conductive substrate with semiconductive layer for functional devices including photodetectors. Gallium-based liquid metal with native oxides surface typically demonstrates such LM/semiconductor construction with attractive photoelectric responsivity, however, the relevant photo-electrode lacking efficient response to visible light due to the wide band-gap of Ga-oxides. This paper presents a straightforward fabrication route containing printing and in-situ reaction growing for the preparation of liquid metal functionalized with narrow-band gap semiconductor ( e.g. , Cu 2 O). The resulting LM/metal-oxides heterostructure exhibits a well-matched liquid–solid contact and good interfacial charge transfer between the soft conductive substrate and active surface components. Characterizations including scanning electron microscopy (SEM), Raman spectroscopy, and UV–visible absorption spectroscopy confirm the successful preparation of the Cu 2 O thin layer with an expanded absorption spectrum range. The as-fabricated photoelectrode consisted of LM-Cu 2 O, through photoelectrochemical (PEC) tests, presents fast photo-responsibility under the simulated sunlight illumination and self-powered capability. Specifically, the LM-Cu 2 O based PEC photodetector shows maximum photoresponsivity of − 70 μA/W and photocurrent density of − 9.5 μA/cm 2 at a bias voltage of 0 V. Our results provide a general method for the design and manufacture of novel photodetectors.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 18
·6606-6614
·
IF 5.7
Muhammad,Zengce Liu,Junchun Li,Yuanyuan Sheng,Yajing Chang,Ping Chen,Yang Jiang
Lead-free halide perovskites have been developed and have received increasing attention in optoelectronic applications due to their non-toxicity. However, single perovskite phosphors that emit vibrant, tunable-color-temperature white-light are rare. Herein, we used the anti-solvent precipitation method to develop white light-emitting diodes (WLEDs) based on rare-earth-based Sb3+ and Mn2+ co-doped Cs2KYCl6 microcrystals (MCs). The Cs2KYCl6 MCs exhibit tunable dual emissions covering a wideband ascribed to the emission of self-trapped excitons (STEs) from Sb3+ and the 4T1 to 6A1d–d transition of Mn2+. The optimal photoluminescence quantum yield (PLQY) of doped Cs2KYCl6 is 65.78%. The energy transfer process from Sb3+ to Mn2+ is revealed. WLEDs have been successfully constructed by combining the dual emissions from STEs of Sb3+ and the d–d transition of Mn2+. These WLEDs demonstrate impressive optical performance, including CIE chromaticity coordinates (0.3483, 0.4125) and a color rendering index (CRI) of 85.4. This work provides an effective strategy for developing WLEDs based on a single-component material, lead-free perovskites.
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JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Li-Juan Feng,Hao-Ran Liu,Li-Li Wang,Cheng-Cheng Yang,Yu-Wei Ding,Xiao-Wu Lei,Zhi-Wei Chen
Organic-inorganic hybrid low-dimensional metal halides have been widely studied as a new class of luminescence materials due to abundant structural diversity and intriguing photophysical property. Herein, we explored two new Cd-based 0D halides of [BHEPZ]CdBr 4 (BHEPZ = 1,4-Bis(2-hydroxyethyl) piperazine) and [EPIPZ]CdBr 4 (EPIPZ = 1-ethylpiperazine) through facile wet-chemistry method. These 0D halides exhibit blue light emissions derived from radiative recombination of self-trapped excitons (STEs) based on detailed spectroscopy investigations. More interestingly, [BHEPZ]CdBr 4 exhibits rapid luminescence off switching toward benzaldehyde but fails in any other organic solvents. In-depth investigations demonstrate that the detection limit can fall to 2.65 ppm indicating perfect real-time fluorescent probe to detect benzaldehyde with high sensitivity and selectivity. This work enriches the cadmium halide materials and provide a new perspective for potential applications of 0D hybrid metal halides.
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Photonics
·
2025
·Vol. 12
·期 12
·
IF 1.9
Yangyang Guo,Fuwen Shi,Bo Li
The NV center in diamonds has been widely employed in quantum sensing, quantum computing, and bioimaging due to its controllable ground-state spin, detectable magnetic resonance, excellent photostability, favorable biocompatibility, and chemical inertness. However, conventional excitation using 532 nm green light still exhibits certain limitations in practical applications. To address this, we propose a novel NV center excitation method based on the upconversion of near-infrared light to green emission. Through the synthesis of molybdenum-doped NaYF4: 20% Yb3+, 1.5% Er3+upconversion materials, efficient excitation of NV centers has been achieved. Both UC-LED luminescence spectroscopy and ODMR measurements confirm that the green light generated via the upconversion process exhibits sufficient intensity to effectively excite NV centers. Meanwhile, the characteristic sharp emission peaks of rare-earth upconversion materials eliminate the need for optical filters, facilitating device miniaturization, and a miniaturized UC-LED sensor has been developed.
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SENSORS
·
2025
·Vol. 25
·期 4
·1122
·
IF 3.5
Chong Li,Sami Ramadan,Hao Kan,Lina Wang
The expansion of the Internet of Things (IoT) has rendered wireless passive, highly stable, and room-temperature gas sensors indispensable for sensor applications. In this work, a room-temperature surface acoustic wave (SAW) H 2 S sensor based on a thin film of nano-mesh woven with Bi 2 S 3 nanoribbons was successfully designed and prepared. The impact of varying inorganic salts solution ligand substitution of long-chain organic ligands of Bi 2 S 3 films on performance was assessed. Notably, the responses of the sensors following ligand substitution exhibited improvement to varying degrees. In particular, the Cu(NO 3 ) 2 -treated sensor to 10 ppm H 2 S was 203% of that of the untreated sensor. Furthermore, the impact of visible light activation on sensor performance was assessed. The results show the sensor has a high sensitivity to H 2 S molecules under yellow light activation at room temperature, with excellent selectivity, fast response speed and low detection limit. The sensor exhibited a response to 10 ppm H 2 S under yellow light activation that was approximately equal ~ two times greater than the response observed in a dark environment. This work provides a novel approach to enhance the performance of room-temperature SAW H 2 S sensors.
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PubMed
高影响因子
BIOMATERIALS
·
2020
·
IF 10.317
Haoran Wang,Yunfei Guo,Chao Wang,Xing Jiang,Honghui Liu,Ahu Yuan,Jing Yan,Yiqiao Hu,Jinhui Wu
Hypoxia exists in most malignant tumors and often contributes to therapy resistance, especially for aerobic treatments such as photodynamic therapy (PDT) and radiotherapy . Here, we developed a novel light-controlled sustainable PDT in which light was used to help photosynthetic microorganisms ( Chlorella ) produce oxygen, and perfluorocarbon was used to enrich oxygen around the photosensitizer for sustained oxygen supply. After light stops, Chlorella further acts as an adjuvant to promote dendritic cell (DC) activation, promoting the antitumor immune response. We showed that sustainable PDT could continuously provide oxygen for photosensitizers and avoid PDT-induced local hypoxia. More importantly, sustainable PDT also promoted the activation of DCs and amplified the antitumor immune effects. Therefore, this novel strategy provides an effective but simple method for improving PDT in both tumor hypoxia and normoxia, and enhancing the antitumor immunity may be a new anti-resistance strategy for treating patients with advanced-stage cancer.
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高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Jie Shao,Xiyang Li,Haiqin Sun,Fuchi Liu,Qiwei Zhang
Nowadays, luminescent information remains limited to multicolor static or single-color dynamic change driven by high-energy UV, still facing a significant challenge in achieving multilevel luminescent encryption. Here, a visible light irradiation-triggered dynamic multicolor luminescent material of Na 2 Ba 6 (Si 2 O 7 )(SiO 4 ) 2 :Eu with multi-coordinated sites is reported. The system possesses three emission centers of red (Eu 3+ ), green [Eu 2+ (2)], and blue [Eu 2+ (1)], and can realize a large luminescence contrast (Δ R t = 96.6% at 444 nm) by 405 nm irradiation-induced oxidation reactions. By adjusting the excitation wavelengths or light irradiation time, the luminescence color and contrast can be dynamically tuned. The unique optical tunable luminescence properties endow them with potential applications in multilevel anticounterfeiting and combined information encryption. The results provide a novel approach for realizing multicolor luminescence modulation under a light field, greatly improving the security level of encrypted information.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 22
·27849-27858
·
IF 3.056
Ou Qi,Xu Shuxia,Long Yuanli,Zhang Xinfeng
The development of efficient solar driven catalyst for the degradation of antibiotics has become increasingly important in environmental protection. However, the reported efficient photocatalysts for antibiotic degradation are limited. In this work, porous Fe 3+ -doped graphitic carbon nitride (g-C 3 N 4 ) with outstanding photocatalytic ability is synthesized and then used as the photocatalyst for the efficient degradation of sulfadiazine (SDZ) under visible light. A series of characterization results indicate that Fe 3+ is successfully doped into the interlayer of g-C 3 N 4 and is stabilized in g-C 3 N 4 by Fe-N coordination bond. The SEM, DRS and ESI and transient photocurrent results demonstrated that Fe 3+ -doped g-C 3 N 4 has a porous structure, a low band gap, improved separation efficiency of photogenerated electron and holes as well as a wider light absorption range. Such improved physical and chemical properties greatly enhanced the photocatalytic ability. Using Fe 3+ -doped g-C 3 N 4 for photocatalytic degradation of SDZ under white light, almost complete degradation of SDZ was achieved with a degradation efficiency as high as 99.8% (whereas only 52.1% for bulk g-C 3 N 4 ) within 90 min. The degradation was mainly ascribe to 1 O 2 during the irradiation, and also a small amount of •O 2 − , OHand h + are involved in the degradation process. The Fe 3+ -doped g-C 3 N 4 was applicable for the degradation of a wide range of antibiotic pollutants.
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高影响因子
Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2025
·
IF 2.2
Jieming Chen,Yuchun Zhang,Yao Li,Peng Fu,Zhiyu Li
Pure TiO2 exhibits limited responsiveness to visible light, while the doping of Ti3+ significantly enhances its absorption efficiency in the visible spectrum, improving the efficiency of photogenerated electron utilization. However, during the direct reduction of TiO2 using NaBH4, the instability of surface Ti3+ ions and their susceptibility to oxidation in air limit their performance in photocatalytic applications. Nitrogen doping into TiO2 effectively addresses this issue, improving the stability of Ti3+ ions and significantly enhancing visible-light-driven photocatalytic activity. Experimental results indicate that reducing 1 g of TiO2 with 0.2 g of NaBH4, followed by calcination in an ammonia environment at 300℃, yields a catalyst with optimal visible-light photocatalytic hydrogen evolution activity, achieving a hydrogen production rate of 847.8 μmol h−1 g−1, representing a 177-fold enhancement over pristine anatase TiO2. After modification, the band gap of the catalyst decreased from 3.2 eV to 2.83 eV. This study elucidates the synergistic effects among Ti3+ species, nitrogen dopants, and oxygen vacancies in TiO2-based photocatalysts, demonstrating their crucial roles in enhancing visible-light-driven hydrogen evolution.
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