APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Jian Chen,Xiaoping Tao,Lin Tao,He Li,Chunzhi Li,Xiuli Wang,Can Li,Rengui Li,Qihua Yang
Artificial photosynthesis aiming to capture and convert renewable solar energy into solar fuels (e.g., hydrogen, chemicals) provides a blueprint for sustainable and carbon-neutral world. In artificial photosynthesis, developing novel semiconductors for visible-light-driven photocatalytic water splitting is one of the most demanding challenges. Herein, we designed and explored two kinds of novel bipyridine-based covalent organic polymers, Bp-COP (2,2′-bipyridine-5,5′-diamine: Bp-NH 2 ) and BpZn-COP (2,2′-bipyridine-5,5′-diamine Zn complex: Bp-Zn), both of which exhibit excellent light-harvesting properties with absorption edges expanding to larger than 600 nm and have appropriate band structures for water splitting. Polymers Bp-COP and BpZn-COP are found to enable efficient photocatalytic hydrogen production under visible light irradiation with Pt as the proton reduction cocatalyst. Further assembling conjugated organic polymers with TiO 2 as charge transferring mediate can remarkably boost their photocatalytic activities to more than 8 times (1333 vs. 162 μmol g −1 h −1 ), giving an apparent quantum efficiency (AQE) of over 2.5% at the input wavelength of 420 nm. This work not only presents a methodology for designing and synthesizing novel organic-based polymers, but also provides promising candidates for potential applications in solar energy conversion.
研究领域:
材料化学
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光催化
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能源化学
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高分子化学
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太阳能转化
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可持续能源
✓ 已验证
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2018
·
IF 1.232
Guangyu Wu,Weinan Xing
Heterogeneous semiconductor photocatalysis has been considered as a cost-effective alternative for the eliminating hazardous pollutants and generating sustainable energy. Graphene, a 2D allotrope of carbon, has received significant attentions due to its outstanding properties. In this work, a highly efficient visible-light-driven ternary heterostructure semiconductor RGO/Ag2O/Ag2WO4 (RGAAW) Ag-based photocatalyst was prepared and its photocatalytic activity was evaluated by photodegradation of methylene orange (MO). The morphology, structure and optical absorption properties of the as-prepared RGAAW were characterized by SEM, XRD, XPS, FT-IR and UV−vis DRS, respectively. The obtained result was found that the as-prepared RGAAW exhibited the excellent photocatalytic activity, which was almost 11.5 and 7 times as high as those of individual Ag2O and Ag2WO4, respectively. The enhancement of photocatalytic performance could be attributed to the reduced graphene oxide sheets can function as an electron collector and transporter to lengthen the lifetime of the charge carriers. Moreover, the as-prepared RGAAW showed excellent stability toward the photodegradation of methyl orange (MO). The possible mechanism of photocatalytic activity enhancement was proposed.
研究领域:
材料科学
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光催化
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环境功能材料
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纳米材料
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半导体物理
·
表面化学
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 102
·100519-100525
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IF 3.289
Fei Wang,Yang Qiu,Bing-Jie Wang,Hua-Lin Wang,Yi-Tao Long
A green method was developed to fabricate a novel porous polymer microsphere with SERS activity, which can be used for ultrasensitive detection because of its preconcentration function. Ultraviolet irradiation as “green” reduction was successfully achieved through several complex processes, namely, monomer solidification, hydrogen peroxide photolysis, and silver nanoparticle fabrication, in only one step. During the solidification process, H2O and O2, which are originally from H2O2 reduction, escaped from the emulsion templates, resulting in various interconnected micro-/nano-channels. The mean pore size of the prepared porous microspheres was 4 μm, and the specific surface area can reach 31 m2 g−1. The silver nanoparticles produced in the reduction process of silver nitrate were deposited on the porous surface of the microsphere and contributed to stable SERS activity with a SERS enhancement factor of up to 3.8 × 106 and a low detection limit of 10−13 M level for rhodamine 6G. This green method provides highly sensitive and uniform SERS substrates and ensures the stability and reliability of our “SERS substrate”.
研究领域:
分析化学
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材料科学
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纳米技术
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生物传感
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物理化学
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DOI
高影响因子
Nano Energy
·
2026
·
IF 16.7
Min Hyeong Lee,Yong-Jun Choi,Jongbeom Kim,Jungho Han,Jinkyu Yang,Donghan Kim,Dongeun Kim,Juyoung Kim,Han Gi Chae,Young Chul Jun,Myoung Hoon Song
Spin light-emitting diodes (spin-LEDs) have garnered significant attention for their potential applications in quantum information technology, three-dimensional displays, and secure optical communications. Although solution-processed spin-LEDs have advanced rapidly, they exhibit limited scalability and reproducibility. By contrast, spin-LEDs fabricated via thermal evaporation offer scalability and reproducibility but remain underdeveloped owing to uncontrolled crystallization and significant nonradiative recombination. In this study, we developed efficient perovskite spin-LEDs via multisource sequential evaporation utilizing PbBr 2 , chiral [1,1′-binaphthalene]-2,2′-diylbis[1,1-diphenyl-1,1′-phosphineoxide] (BINAPO) molecules, and CsBr. The chiral BINAPO molecules with bidentate (P = O) 2 groups surround the CsPbBr 3 lattice to form a perovskite–BINAPO structure. This structure controls perovskite crystallization, passivates surface defects, and enhances the exciton binding energy. Furthermore, the chiral-induced spin-selectivity effect of the chiral BINAPO shell alters the spin states of the injected carriers, which are subsequently transferred to the perovskite core, leading to the emergence of chiro-optical properties in the perovskite. The resulting perovskite spin-LEDs achieve maximum external quantum efficiencies of 13.20% (R-target) and 12.35% (S-target), in conjunction with electroluminescence dissymmetry factors of −0.124 (R-target) and 0.106 (S-target). This study presents the first demonstration of circularly polarized electroluminescence from thermally evaporated perovskite spin-LEDs, building a scalable platform for high-efficiency spin optoelectronics and practical perovskite spin-LEDs integration.
✓ 已验证
DOI
高影响因子
Solar RRL
·
2026
·Vol. 10
·期 11
·e70402
·
IF 4.8
Shuai Wang,Xiaona Liu,Yang Yang,Tianwei Dou,XiongWei Liang,Changhao Yao,Xiaofan Zhao,Baojiang Jiang
Photocatalytic persulfate (PMS) activation has gained significant attention for environmental remediation. Despite progress, developing efficient, sustainable photocatalysts remains challenging. We report a solvothermally synthesized In 2 O 3 /Mn 2 O 3 Z-scheme heterojunction with subsequent ion impregnation. This novel photocatalyst demonstrates exceptional PMS activation under visible light, achieving 95.2% tetracycline (TC) degradation within 120 min. The enhanced performance stems from intimate interfacial contact in the Z-scheme configuration, facilitating rapid photogenerated charge transfer. Furthermore, PMS serves dual roles as radical precursor and electron scavenger, promoting generation of reactive radicals for TC degradation. This work presents an advanced Z-scheme photocatalyst system offering efficient organic pollutant removal, with potential applications in water purification technologies.
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Wang Jindi,Ren Hongdan,Cai Bo,Li Mingyang,Fan Wenxuan,Xu Leimeng,Yao Jisong,Wang Shalong,Song Jizhong
Perovskite quantum dot-based light-emitting diodes (QLEDs) have been regarded as promising emitters for lighting and displays. However, the operational stability still greatly hinders their practical applications. Here, we introduce ultrathin nano-layered boron nitride (BN) as buried interfacial layer to enhance device stability. As an effective blocking layer, BN not only interacts with perovskite to passivate interface defects and eliminate ion migration channel, but also directly suppresses ion migration. Meanwhile, BN makes exciton recombination behavior and electrical transport properties of perovskite QDs less sensitive to the heat. Resultantly, BN-optimized QLEDs achieved an average EQE of 30.05% and extrapolated operational lifetime T 50 of 25,263 h at an initial luminance ( L 0 ) of 100 cd m −2 , which is 1.7-fold and about 100-fold improvement compared to control devices, respectively. In this work, integrating 2D materials into perovskites through interface engineering provides a pragmatic tactic to enhance the performance of halide perovskite-based LEDs.
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 8
·e71084
·
IF 4.2
Jiahui Jiang,Jing Li,Yanna Tian,Hui Lin,Yang Tang,Junwei Zhang,Hao Chen,Fan Liu,Ruijin Hong,Zhaoxia Han,Dawei Zhang
Ce:LuAG ceramic phosphors are promising green phosphor conversion materials for high-brightness lighting and display. However, despite its excellent resistance to thermal quenching, Ce:LuAG still suffers from thermal drop of the luminescence under high-power excitation, particularly under ultra-high-brightness laser excitations. This work investigated the effects of excessive Al 2 O 3 addition to the Ce:LuAG ceramic phosphor combined with vacuum brazing on the luminescence thermal stability. Experimental results indicate that 10 wt.% Al 2 O 3 addition improves the Ce:LuAG ceramics microstructure, thermal conductivity, and in result enhances the comprehensive luminescence performance. Cross-sectional BSE and EDS analysis reveals a dense, crack-free brazed interface with Ti enrichment at the ceramic/braze boundary, confirming the formation of a Ti-O reaction layer that enables chemical bonding and efficient heat dissipation. The sample with an additional 10 wt.% Al 2 O 3 brazed at 870°C achieves light conversion efficiency of 253 lm·W −1 at an excitation light power of 2 W, with light conversion efficiency drop of only 10% at a light power of 8 W. (For the samples without additional 10 wt.% Al 2 O 3 , the light conversion efficiency drop exceeds 15.5% at an excitation light power of 8 W.) With light output exhibiting good linear correlation with excitation blue laser power across the 0–30 W range ( R 2 = 0.99784). The illuminance of the ceramic increased linearly within the 10–80 W range, the brazed sample at 870°C reached 2.05 × 10 4 lx under a light excitation power of 90 W, exhibiting better luminescence thermal stability than the Ce:LuAG ceramic phosphors without excessive Al 2 O 3 addition. The combination of excessive Al 2 O 3 addition and vacuum brazing is an effective solution for achieving robust luminescence from Ce:LuAG ceramic phosphors toward high-power laser excitations.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Ming-Hin Chau,Marc C.A. Stuart,Franco King-Chi Leung
Photoresponsive amphiphiles are functionalised with photoactivating units, enabling dynamic controls of hierarchical supramolecular systems with a non-invasive photo-stimulation. Limited visible-light driven photoresponsive amphiphiles were developed, while biomedical applications of well-developed UV-light driven photoresponsive amphiphiles are hindered due to bio-damaging effect. Herein, we report newly designed red-light responsive N, N′ -alkyl-aryl-substituted indigo amphiphiles (IA), showing excellent photoswitchability and photostability in organic media. Upon dissolution of IA in aqueous media, supramolecular nanostructures are constructed at pH 7. Though photoresponsiveness of IA is slightly compromised, co-solvent and co-assembly of IA enable supramolecular transformations from vesicle to irregular aggregate in aqueous media. Through investigation of the photoisomerisation and supramolecular transformation processes, this work could provide as a new strategy towards the development of red-light controlled biomedical soft functional materials .
研究领域:
材料科学
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生物医学工程
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化学
·
纳米技术
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yu Wang,Jie Tang,Cong Peng,Meifeng Xu,Lei Zhang,Chaonan Wang,Yonglong Jin,Tian Xu
Local surface plasmon resonance (LSPR) based on metal nanostructures was widely used in enhanced light capture and light absorption . In addition, LSPR can also facilitate processes such as exciton dissociation and charge transfer (CT) in solar cells. We developed perovskite solar cells (PSCs) by coating chips with hexagon-like nanostructures on the backside of Indium tin oxide (ITO) conductive glass using the double metal cladding waveguide (DMCW) technology. The optical absorption and photoelectric conversion efficiency (PCE) of the PSCs with different morphologies of chips were analyzed. The LSPR of the chips corresponded with the absorption capacity of perovskite . LSPR enhanced the scattering, gathering, and capture of light energy . Because the strong absorption rates at the long wavelengths after 600 nm in the ultraviolet visible (UV–Vis) spectrum, the properties of PSCs with the chips are improved. The PCE and short circuit current density (J sc ) increased by 27.21%, and 6.78%, respectively, attributed to the increase in the optical path of incident light and the light absorption capacity of the active layer.
研究领域:
材料科学
·
光子学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 4
·2202043
·
IF 10.05
Maotao Yu,Yongqiang Ji,Haoming Yan,Jinhao Hu,Shunde Li,Hongyu Xu,Peng Chen,Lichen Zhao,Shuzhen Guan,Xiaoyin Bi,Xiaoyu Yang,Shuang Jia,Chang Yi,Deying Luo,Jianpu Wang,Zheng-Hong Lu,Qihuang Gong,Rui Zhu
The external quantum efficiency (EQE) of state-of-the-art near-infrared perovskite light-emitting diodes (PeLEDs) is now approaching the limit set by the out-coupling efficiency. However, there is plenty of room for enhancing these devices’ radiance and the EQE roll-off. This work reports how conductive and passivating additives construct efficient high-radiance near-infrared PeLEDs with improved EQE roll-off. Specifically, the synergistic effect of 1,4-phenylenediacetic acid (PDA) and 5-aminovaleric acid (5-AVA) is used to regulate the quality of the perovskite emissive layer, thereby enhancing the roll-off threshold of injection currents (a value at which the device EQE or radiance starts degrading). According to in situ structural evolution analyses from the perovskite precursor to the perovskite crystal, the presence of PDA within the perovskite precursor solution can produce an intermediate phase with 5-AVA and formanmidinium cation, which can retard the perovskite nucleation and crystal growth, leading to improved perovskite film quality. The resulting champion PeLED delivers among the highest radiance of 505 W sr −1 m −2 and a peak EQE of 17.56%. More importantly, the improved PeLED shows a well-retained radiance of 80% at a current injection density of up to ≈1800 mA cm −1 , opening a new avenue for high-radiance PeLEDs with improved roll-off degradation.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Dehai Liang,Lin Tan,Shirong Lu,Zhe Sun,Huaxin Wang,Wensi Cai,Zhigang Zang
Inorganic perovskites CsPbX3 (X = Cl, Br, I) have shown great potential as luminescent materials for a wide range of photoelectric devices. However, the practical use of these materials is limited due to the toxicity of lead and poor stability. Here, we present a facile low-temperature, solution-based method to synthesize lead-free and highly stable Cs3Cu2Br5 single crystals (SCs) without the use of organic solvents. Owing to the self-trapped exciton emissions, Cs3Cu2Br5 SCs exhibit a strong broadband blue emission with a high photoluminescence quantum yield (PLQY) upon 254 nm ultraviolet light excitation. In addition, the Cs3Cu2Br5 SCs show a high stability against heat, humidity, and UV light. Therefore, the Cs3Cu2Br5 SCs are utilized as emitters in white light emitting diodes (WLEDs), demonstrating a high color rendering index of 81 and a decent commission internationale de l’Eclairage coordinate of (0.30, 0.34). Furthermore, the prepared WLEDs are used in wireless visible light communications, showing a −3 dB bandwidth of 6.7 MHz and an achievable data rate of 45 Mbps. Our study provides a novel organic-solvent-free, low-temperature method to synthesize Cs3Cu2Br5 SCs and could promote the development of Cu-based metal halides in visible light communications.
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 17
·期 12
·2300427
·
IF 11
Na Lin,Ri-Cheng Wang,Shao-Ya Zhang,Zi-Han Lin,Xing-Yu Chen,Zi-Ning Li,Xiao-Wu Lei,Yu-Yin Wang,Cheng-Yang Yue
Despite the extraordinary X-ray scintillation performance of three-dimensional (3D) lead perovskite nanocrystals (PNCs), the serious biotoxicity of Pb 2+ and luminescent instability in water remain insurmountable obstacles for their applications in medical imaging. To address these drawbacks, herein, the study demonstrates one new lead-free zero-dimensional (0D) hybrid cuprous halide of single-crystalline [BzTPP] 2 Cu 2 I 4 (BzTPP = Benzyltriphenylphosphonium) as a satisfactory X-ray scintillator. [BzTPP] 2 Cu 2 I 4 displays broadband yellowish-green light emission with a high photoluminescent quantum yield (PLQY) of 44.2% and large Stokes shift of 167 nm upon UV light excitation. High PLQY and negligible self-absorption enable [BzTPP] 2 Cu 2 I 4 to display impressive scintillation performance excited by X-ray with a light yield of 27 706 photons MeV -1 and low detection limit of 0.352 µ Gy s −1 , surpassing typical 3D PNCs. More importantly, [BzTPP] 2 Cu 2 I 4 represents extraordinary structural and luminescent stability in water for at least one month. The excellent and stable radioluminescence performance as well as solution growth method ensure a [BzTPP] 2 Cu 2 I 4 -based screen for fine-resolution X-ray imaging with potential in radiography and inspection. This work highlights the multiple merits of low-toxicity and cost, high light yield, and long-term water-stability of 0D hybrid cuprous halides as highly desirable X-ray scintillators.
研究领域:
材料科学
·
医学物理
·
放射学
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DOI
高影响因子
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