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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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Na Meng,Yajing Li,Xiaorong Shi,Ziqiang Wang,Junhao Liu,Yutian Xu,Yuanhao Cui,Xinwu Ke,Xueli Li,Boya Hu,Xue Min,Kui Xu,Zhelu Hu,Lingfeng Chao,Yingdong Xia,Qingxun Guo,Yonghua Chen
Thermally evaporated perovskite light-emitting diodes (PeLEDs) have emerged as a promising technology for next-generation display applications. However, achieving high luminance remains a critical challenge. In this study, a significant enhancement in the luminance of fully vacuum-evaporated PeLEDs is demonstrated by optimizing both the crystallinity of perovskite films and hole injection efficiency. A lateral 0D/3D Cs 4 PbBr 6 /MA x Cs 1-x PbBr 3 heterostructure is achieved via co-evaporation of MABr (MA + = CH 3 NH 3 + ), CsBr, and PbBr 2 . Theoretical calculations indicate that MAPbBr 3 , with its lower formation energy, preferentially forms and serves as a nucleation site for the growth of high-quality MA x Cs 1-x PbBr 3 , significantly improving crystallization. Excess CsBr and PbBr 2 react to form Cs 4 PbBr 6 , which passivates defects and confines excitons, thereby enhancing photoluminescence efficiency. The resulting perovskite films exhibit suppressed non-radiative recombination. Additionally, hole injection and transport efficiency are improved through p-type doping, ensuring sufficient carrier injection for high-luminance emission. As a result, the optimized PeLEDs achieve a maximum brightness of 246, 211 cd m − 2 , representing the highest level reported to date for thermally evaporated PeLEDs. These findings underscore the potential of thermally evaporated perovskites for high-brightness display and lighting applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yu Zhu,Liying Guo,Ruiyue Zhang,Qianqian Tian,Hongzhang Cao,Li Wang,Yu Tang,Liangliang Liu
Hierarchical porous carbon modified with multiple carbonyl ligands (HPC-1) was synthesized for the selective extraction of light rare earth elements. The material was fabricated through a dual-template strategy combined with KOH activation to enhance the specific surface area, followed by surface ligand modification. Structural integrity after activation and functionalization was confirmed by SEM and TEM analyses, while FTIR, XPS and TGA collectively verified the covalent bonding of carbonyl groups. Adsorption studies revealed rapid equilibrium kinetics and enhanced light rare earth element selectivity, achieving a saturation capacity of 29.11 mg g−1. FTIR and XPS verified the chemical anchoring of the carbonyl ligand and the coordination mechanism with rare earths, and it was speculated that the metal ions in this system were coordinated with tridentate ligands (e.g., carbonyl and pyridine N), accompanied by physical adsorption in some of the micropores. Density functional theory (DFT) calculations of the difference in binding energies of the ligands and ions further revealed the mechanism of adsorption selectivity. Compared to conventional porous carbons, HPC-1 demonstrates superior acidic stability, reduced column backpressure, and improved reusability, effectively addressing critical challenges in solid–liquid extraction systems. The synergistic combination of hierarchical porosity and tailored surface chemistry establishes HPC-1 as a promising platform for selective light rare earth element recovery.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-11
·
IF 2.8
Wang Qun,Bu Ranran,Xu Changyuan,Zhao Fengjiao,Yin Hongming
Tellurite glass samples doped with Er 3+ and Eu 3+ were synthesized by the high-temperature solid phase method. The XRD diffraction pattern shows the amorphous properties of the prepared samples. The luminescence properties of glass samples were analyzed using the absorption spectrum, excitation spectrum, and emission spectrum. The energy transfer mechanism between Er 3+ ions and Eu 3+ ions was studied by changing the concentration of Eu 3+ ions, and the results were verified by measuring the luminescence decay lifetime. It is worth noting that at 380 nm excitation, Er 3+ and Eu 3+ co-doped tellurite glass exhibits remarkable tunable luminescence characteristics: by adjusting the concentration of Eu 3+ ions, the emission color can be flexibly adjusted from green to orangish-red. In addition, by effectively combining the prepared co-doped glass sample with the 380 nm GaN chip, the cold white light emission with CIE coordinates of (0.324, 0.320) was successfully achieved. According to the variable-temperature spectroscopy, at 210℃, the emission peak intensities of the co-doped Er 3+ /Eu 3+ tellurite glass at 547 nm and 613 nm are above 70% of the room-temperature luminescence intensity, demonstrating excellent thermal stability. Graphical
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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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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Minglu Sun,Peng Zhou,Jiali Peng,Chuanshu He,Ye Du,Zhicheng Pan,Shijun Su,Fan Dong,Yang Liu,Bo Lai
Generation of reactive radicals via photocatalytic peroxymonosulfate (PMS) is restricted by the sluggish kinetics of PMS decomposition and lack of electron transfer channel. Herein, we firstly prepared rare earth oxide functionalized carbon nitride (5-ScO-CN) by simple in-situ one-step calcination method, and surprisingly found it mediated photoexcited electron transfer between PMS and organic contaminants to boost PMS based oxidation decontamination. Rare earth oxide proceeds as active sites to mediate electron transfer from organic contaminants and PMS under visible light irradiation, it concurrently elevates fast oxidation of organic contaminant and activation of PMS to produce reactive radicals to further oxidize organic contaminants. We conducted density functional theory (DFT) calculation and galvanic oxidation process (GOP) to further unveil the role of 5-ScO-CN for mediating photoexcited electron transfer and generation of reactive radicals. This work proposes a novel mechanism for visible light boosted PMS based oxidation and provides a novel strategy for application of photocatalytic oxidation in environmental remediation field.
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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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ACS Photonics
·
2024
·
IF 6.5
Haixiao Zhao,Chenlin Wang,Chengxi Lyu,Xian Zhao,Baoqing Sun,Yuan Gao
Colloidal quantum dots (CQDs) are promising optical gain media distinguished by their narrow emission spectra and adaptable wavelengths. However, their isotropic nature often results in randomly oriented transition dipoles within laser cavities, thereby reducing their coupling with the optical modes. Here, we propose nanoplatelets (NPLs) as an alternative. By aligning them on a large scale, we ensure well-oriented transition dipoles with the longitudinal modes of Fabry–Perot (F-P) cavities. This alignment enhances coupling with cavity modes, resulting in directional emission and a significant reduction in lasing thresholds by a factor of 2.19. Our approach illuminates pathways for optimizing CQD-based optoelectronic devices by improving light-matter interaction.
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Materials Today Bio
·
2025
·
IF 10.2
Yi Liao,Shengmei Zhou,Andrew J. Quantock,Wei Li,Yuan Xu,Xie Fang,Robert D. Young,Wanling He,Qingjian Li,Houjian Zhang,Ruochen Wang,Yi Han,Hongwei Cheng,Wenjun Li,Lu Peng,Rongrong Zong,Yi Hong,Zhirong Lin,Zuguo Liu
Although cell-encapsulating hydrogels are of tremendous interest in regenerative medicine, few of them have been used in clinics and rarely used natural extracellular matrices as polymer precursors. One successful example is to use riboflavin (RF)/ultraviolet A (UVA) to cross-link corneal collagen, which has been used in clinics to halt disease progression in patients with corneal ectatic diseases. However, high-energy UVA and its action on RF cause tissue damage, particularly irreversible endothelium loss, and thus standard RF/UVA protocol may have limitations in treating patients at the advanced stage with thin cornea. Photo-initiators lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) has high efficiency under visible 405 nm light, and is widely applied in 3D bioprinting to cross-link synthesized monomers. Here, we introduced a new strategy to cross-link cornea using LAP and visible light (VL). The LAP/VL protocol could effectively increase corneal stiffness with equivalent efficiency to the RF/UVA protocol in both porcine and rabbit cornea. As LAP and VL were used, the loss of corneal endothelial and stromal cells was minimized, and epithelial wound healing and stromal cell repopulation were accelerated. In summary, we propose that the LAP/VL protocol is an effective and safe alternate for cornea CXL with advantages for relatively thin cornea. Our study also expands the application scope of LAP, indicating it is a suitable photocatalyst for in situ natural extracellular matrices CXL.
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Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 25
·5441-5450
·
IF 5.344
Qianmin Zhang,Xiaojuan Wei,Yongli Ji,Li Yin,Zaizai Dong,Feng Chen,Mingqiang Zhong,Jian Shen,Zhenjie Liu,Lingqian Chang
Bio-sourced hydrogels are attractive materials for diagnosing, repairing and improving the function of human tissues and organs. However, their mechanical strength decreases with an increase in water content. Furthermore, it is challenging to mold these hydrogels with high precision, which significantly limits their applications. Herein, we modified a biocompatible and biodegradable material, hyaluronic acid, with methacrylic anhydride and then cured it with a four-arm star structure cross-linking agent under ultraviolet light. The hyaluronic acid hydrogel was finally cured within 15 s with an adjustable cross-linking degree. The results demonstrated that the developed gel maintained good mechanical strength with a water content of 90%, while achieving micropatterns at a precision of 20 μm. The biological experiments showed that it could effectively promote the release of vascular endothelial growth factor (VEGF), which contributed to promoting cell growth, and has favorable biocompatibility. Overall, this hyaluronic acid hydrogel is a promising biomedical material with high forming accuracy, excellent mechanical properties, and favorable biocompatibility, which indicate its potential value in a variety of tissue engineering and biomedical applications.
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Frontiers in Chemistry
·
2020
·
IF 3.693
Qiu Ping,Wang Qiuhe,Zhao Yizhou,Dai Yi,Dong Yuanyuan,Chen Changli,Chen Qi,Li Yujing
The halide perovskite (PVSK) material, an excellent light absorber with fast carrier kinetics, has received increased attention as a potential photocatalyst for organic synthesis. Herein, we report a straightforward synthesis of chemically modified halide perovskite and its application as an efficient photocatalyst to convert styrene into benzaldehyde. A simple method is employed to synthesize the chemically modified CsPbBr3/Cs4PbBr6 nanosheets by using ZrCl4 to simultaneously achieve the Cl doping and the surface modification with Zr species. The photocatalytic oxidation rate of styrene to benzaldehyde catalyzed by surface-modified CsPbBr3/Cs4PbBr6 nanosheets under visible light can reach 1,098 μmol g−1 h−1, 2.9 times higher than that of pristine CsPbBr3/Cs4PbBr6 nanosheets (372 μmol g−1 h−1). The enhanced photocatalytic performance may originate from the modified band structure induced by the synergistic effect of Cl doping and surface modification, whereby the same methodology can be applied to MAPbBr3. This work demonstrates the surface modification of PVSK materials and their potential as efficient photocatalyst toward organic synthesis.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jingkun Wang,Yanqin Miao,Ze Lu,Qi Zhang,Wenhao Guo,Min Zhao,Xinping Zhai,Huayun Du
Stanene nanodots (SnNDs) derived from layered tin have attracted considerable interest due to their conveniently tunable bandgap and topological superconductivity. However, high-yield exfoliation of ultrathin SnNDs is still a challenge due to the short layer spacing and strong binding energy. In this work, atomically thin SnNDs with a uniform size of 2.3 nm are successfully prepared by utilizing imidazolium ionic liquid-assisted exfoliation. The obtained SnNDs possess a wide bandgap of 2.69 eV, along with notable solvent compatibility (well dispersed in both polar and nonpolar solvents) and excellent stability. Furthermore, we construct Ir(ppy)3-based green OLED with hybridizing SnNDs and graphene oxide (GO) as the hole injection layer (HIL). It proves that the application of SnNDs helps to modulate the work function and passivate surface defects of GO, increasing hole mobility and thereby improving the device performance. Compared to the PEDOT:PSS-based control device, the optimized SnNDs-GO-based OLED demonstrates an improvement of 6.56, 41.06, and 8.16% in current efficiency (CE), power efficiency (PE), and external quantum efficiency (EQE), respectively. This work not only introduces a new approach to preparing 2D SnNDs but also creates a novel HIL material for OLED devices.
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