Laser & Photonics Reviews
·
2023
·Vol. 18
·期 3
·2300608
·
IF 11
Ruiyang Li,Yongfu Liu,Chen Jin,Liangliang Zhang,Jiahua Zhang,Xiao-Jun Wang,Guoxin Chen,Jun Jiang
Near-infrared (NIR) phosphor-converted (pc) light-emitting diodes (LEDs) are gaining popularity as smart NIR spectroscopy light sources. However, the low wall-plug efficiency (WPE) of NIR pc-LEDs has limited their applications due to the comprehensive properties of external quantum efficiencies (EQEs) and thermal stability for NIR phosphors. In this study, a simple strategy is presented to achieve high-performance NIR phosphors by breaking the d–d parity forbidden transitions of Cr 3+ in the garnet host by introducing asymmetric vibrations via lattice distortions. The achieved EQE is as high as 44% at room temperature and maintains >98% of the initial EQE at 150 °C, demonstrating excellent thermal stability. Notably, these NIR phosphors enable unprecedented NIR pc-LEDs with a record WPE of 26% driven at 100 mA. Consequently, the application of NIR pc-LEDs is expanded to new areas such as real-time heart rate monitoring and fingerprint recognition.
研究领域:
材料科学
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光学工程
·
生物医学工程
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DOI
高影响因子
Environmental Science-Nano
·
2023
·Vol. 10
·期 11
·3111-3121
·
IF 7.3
Jiaqi Bu,Hongru Jiang,Tianhao Li,Chengyun Zhou,Shian Zhong
In the electrocatalytic (EC) degradation process, low current efficiency, mineralization efficiency, and mass transfer efficiency have limited its widespread application. To overcome these limitations, spherical particle electrodes (LZT–SO) with high electrocatalytic activity were simply prepared by using lead–zinc tailings (LZT) as catalytically active substances and soil (SO) from riverbeds as the carrier. The LZT–SO electrode was introduced into an electrocatalytic (EC) reaction tank to establish a three-dimensional catalytic oxidation system (EC/LZT–SO). Compared with the EC (0.0118 min−1) and EC/SO (0.0271 min−1) systems, the EC/LZT–SO system exhibited a higher sulfamethoxazole (SMZ) degradation rate (0.0597 min−1). EPR analysis and free radical capture experiments confirmed that ·OH played a major role in the degradation process. SEM + EDS analysis confirmed that Fe and Mn metal oxides were the main active sites of the LZT–SO electrode. Under complex water conditions, the degradation efficiency of SMZ reached 94–100% within 70 min. Even after three cycles, the EC/LZT–SO system still maintained a high removal efficiency of 93.75% for SMZ, with only a slight decrease of 6.25%. Triple quadrupole liquid chromatography-mass spectrometry (LC-MS) and Toxicity Estimation Software Tool (TEST) software were used to study the products after SMZ degradation and it was found that the products were almost harmless. This work will provide a new perspective for the “treat waste with waste and turn waste into treasure” approach, which can accelerate the development of recycling waste tailings.
研究领域:
环境科学
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电化学
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废物管理
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水处理
·
催化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xianwei Fu,Ziyu Ma,Luoyu Liu,Sajjad Hussain,Qiuye Li,Dongwei Ma,Shilong Jiao
Electrochemical conversion of carbon dioxide into formic acid, which is one of the most economically viable chemicals, has been demonstrated as an efficient approach for closing the carbon cycle. However, it’s still challenging to reduce the overpotentials and increase the current densities for the future deployment of the CO 2 electrolysis technology. Here, we boost the intrinsic activity of the Bi-based electrocatalyst through the synergy of the enhanced charge transfer and mass transport process in the electrochemical reactions by generating an atomic disorder in the crystal lattices. The amorphous Bi-based quantum dots (a-BiQDs) serve as promising electrocatalysts toward formate production in a wide potential range with high Faradaic efficiency ( FE ) and energy efficiency ( EE ) in both the conventional H-cell and flow-cell, which is almost 5-fold enhanced in comparison with its crystalline counterpart. The maximum FEs of 94.44 % and 98.89 % are achieved at the potential of −1.0 V vs. RHE in the H-cell and flow-cell, respectively. Furthermore, long-term stability of more than 900 h is demonstrated in a two-electrode configuration. Combined molecular dynamics and first-principle calculations ascribe the remarkable activity toward formate production to synergistically accelerated mass transport and charge transfer kinetics during the electrocatalytic process. This work provides an effective approach for constructing electrocatalysts with high intrinsic activity, desired selectivity, and sufficient durability for large-scale deployment of CO 2 electrolysis technology.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Jingjing Cao,Wenji Zhan,Meng Ren,Yao Wang,Haifei Wang,Ni Zhang,Yuetian Chen,Tianfu Wang,Yanfeng Miao,Yixin Zhao
The application of promising perovskite light-emitting diodes (PeLEDs) faces a significant challenge known as efficiency roll-off, which refers to the decline in external quantum efficiency (EQE) at high current densities. This issue arises mainly from high trap densities in perovskite films and imbalanced carrier injection, which limit improvements in brightness and stability of PeLEDs. Here, we develop a green solvent strategy using γ-valerolactone (GVL) to suppress efficiency roll-off in PeLEDs. This strategy effectively slows down the crystallization kinetics, yielding cubic-phase formamidinium lead triiodide (α-FAPbI3) films with reduced trap states, enhanced charge carrier injection, and suppressed Auger recombination. As a result, we achieve a record radiance of 1411 W sr–1 m–2 for GVL-based PeLEDs. These PeLEDs exhibit a substantially reduced efficiency roll-off, maintaining an EQE above 20% even at a high current density of 900 mA cm–2. Our findings highlight the potential of the green solvent approach for developing high-brightness, high-efficiency PeLEDs for practical applications.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Zhiyong Zhou,Haotian Liu,Jiahui Fan,Xueting Liu,Yafei Hu,Yulei Hu,Yong Wang,Zhongqi Ren
Sodium phosphomolybdate with a spatial stereo symmetry structure and stability in acid and alkali was used as a new coextraction agent for separating Li+. In addition, methyl isobutyl ketone and tributyl phosphate were used as diluent and extractant, respectively. The influence of operation conditions on separation performance of lithium ion was investigated. The single stage extraction efficiency of Li+ was 58.74% with the volume fraction of tributyl phosphate, O/A phase ratio, and molar ratio of sodium phosphomolybdate to lithium as 40%, 3.6, and 1, respectively. Then the cross-flow and saturated extraction experiments were conducted. When 0.2 mol/L LiCl + 1.8 mol/L NaCl solution was used as washing agent and O/A phase ratio was 3, the washing efficiency of Mg2+ reached up to 99.59%. When 0.26 mol/L HCl solution was used as stripping agent and O/A phase ratio was 3, the stripping efficiency of Li+ reached 98.3%. The difference in extraction efficiency was within 6.5% through 10 recyclings of the organic phase, indicating that the coextraction agent was very stable. The extraction mechanism was investigated and the binding ability of P═O in tributyl phosphate molecule followed the sequence Li+ ≫ Na+ > K+ > Mg2+.
研究领域:
化学工程
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材料科学
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环境化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 10
·4365-4373
·
IF 9.931
Liguo Gao,Likun Wang,Xiaogang Ding,Erling Zhao,Shuzhang Yang,Yingyuan Zhao,Yanqiang Li,Shufeng Wang,Tingli Ma
The power conversion efficiency (PCE) of perovskite solar cells (PSCs) can be improved by introducing appropriate additives into perovskite precursor solutions. However, the exact role and mechanism of additives are still unclear. In this study, self-designed cognition experiments were conducted to improve the hole extraction efficiency, as well as to deeply understand the working principle of additives. A common hole transport material, 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl) amino]-9,9′-spirobifluorene (spiro-OMeTAD), was used as an additive for bulk heterojunction PSCs (BHJ-PSCs). The results showed that the PCE of mesoporous BHJ-PSCs (M-BHJ-PSCs) was enhanced by more than 15% when an extremely low concentration of spiro-OMeTAD additive was added. However, the crystallization of the perovskite was hampered and the recombination risk increased when grain boundaries increased in the perovskite layer. Planar BHJ-PSCs were fabricated to further investigate the role of additives. In comparison with those in planar BHJ-PSCs, the hole extraction efficiency and diffusion length significantly improved in M-BHJ-PSCs due to the transport paths and relay effects caused by the spiro-OMeTAD additive. Subsequently, exact functions and a new working principle of additives in BHJ-PSCs were proposed. This study may extend the possibilities of designing highly efficient PSCs through the promotion of additive research and application.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Yifeng Yao,Shiqi Li,Huixia Xu,Zhixiang Gao,Jingkun Ren,Yanxia Cui,Linfeng Cai,Furong Zhu,Yuying Hao
Realization of efficient charge extraction at the cathode and anode interfaces is still one of the challenges for improving the power conversion efficiency (PCE) of the semitransparent perovskite solar cells (PSCs). In this work, we report our effort to enhance the PCE of semitransparent PSCs by incorporating a pair of an energetically favorable cathode buffer layer (CBL) and a hole-transporting layer (HTL). The effects of different CBLs, e.g., bathophenanthroline, bathocuproine, and perylene diimide, on charge extraction efficiency and PCE of the semitransparent PSCs are analyzed. Scanning electron microscopy reveals that UV-plasma-treated poly(bis(4-phenyl) (2,4,6-trimethylphenyl) amine) (PTAA) HTL surface favors the growth of a uniform and dense functional CH 3 NH 3 (I 0.75 Br 0.15 ) 3 perovskite layer across the substrate, with a low defect density for suppressing charge recombination loss. An average PCE of 13.53% and 9.92% was obtained with combination of a bathocuproine CBL and a PTAA HTL measured from the indium tin oxide (ITO) side and Ag side, respectively. Semitransparent PSCs possess an encouraging large average open-circuit voltage of 1.13 V, and an average transparency of 21%. Achieving an efficient charge collection and retaining a high built-in potential across the CH 3 NH 3 (I 0.75 Br 0.15 ) 3 photoactive layer via interfacial modifications are a prerequisite for attaining high-performance semitransparent PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 39
·2302283
·
IF 29.4
Wenhao Bai,Tongtong Xuan,Haiyan Zhao,Haorui Dong,Xinru Cheng,Le Wang,Rong-Jun Xie
Perovskite light-emitting diodes (PeLEDs) are strong candidates for next-generation display and lighting technologies due to their high color purity and low-cost solution-processed fabrication. However, PeLEDs are not superior to commercial organic light-emitting diodes (OLEDs) in efficiency, as some key parameters affecting their efficiency, such as the charge carrier transport and light outcoupling efficiency, are usually overlooked and not well optimized. Here, ultrahigh-efficiency green PeLEDs are reported with quantum efficiencies surpassing a milestone of 30% by regulating the charge carrier transport and near-field light distribution to reduce electron leakage and achieve a high light outcoupling efficiency of 41.82%. Ni 0.9 Mg 0.1 O x films are applied with a high refractive index and increased hole carrier mobility as the hole injection layer to balance the charge carrier injection and insert the polyethylene glycol layer between the hole transport layer and the perovskite emissive layer to block the electron leakage and reduce the photon loss. Therefore, with the modified structure, the state-of-the-art green PeLEDs achieve a world record external quantum efficiency of 30.84% (average = 29.05 ± 0.77%) at a luminance of 6514 cd m −2 . This study provides an interesting idea to construct super high-efficiency PeLEDs by balancing the electron-hole recombination and enhancing the light outcoupling.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Fulong Zhu,Zhengcheng Hu,Wei Guo,Yongzhu Fu
Alkaline zinc-iron flow batteries (ZFBs) have recently attracted renewed attention. However, the critical issues with zinc anodes, such as dendrite formation, side reactions, and labile plating or stripping, have yet to be adequately addressed. Here, an attempt is made to overcome these challenges by designing Boron-doped carbon-felt (B–CF) electrodes rich in electron-deficient sites and defects. The fabricated B–CF provides improved adsorption of negatively charged Zn(OH) 4 2− , robust Zn nucleation sites, and lower Zn nucleation and deposition overpotentials, leading to homogeneous Zn deposition morphology. Uniform Zn deposition enables the prevention of undesirable dendrite growth and parasitic reactions. As a result, the constructed alkaline ZFBs achieve a high average Coulombic efficiency of ≈99.85% and energy efficiency of 88% with uniform Zn deposition during 300 cycles (40 mA cm −2 ). This work expands the understanding of the electrode design strategy for achieving favorable Zn plating/stripping.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2017
·
IF 5.715
Muhammad Farooq Mustafa,Xindi Fu,Wenjing Lu,Yanjun Liu,Yawar Abbas,Hongtao Wang,Muhammad Tahir Arslan
Fugitive methane (CH 4 ) from waste treatment facilities (landfill mining), power industries (oil and gas process plants) and coal mining etc. into atmosphere is an increasing environmental concern. In this study, CH 4 conversion efficiency in double dielectric barrier discharge (DDBD) has been investigated at various operating parameters including input power, feed gas-mixture flow rate, CH 4 initial concentrations, and discharge gap distance between two dielectrics. Increase in input power, decrease in the gas-mixture flow rate and discharge gap distance; results in increases of CH 4 conversion efficiency. In plasma alone, maximum CH 4 conversion efficiency of 76% was obtained using 3 mm plasma discharge gap distance at flow rates of 2 L/min, input power of 65.8 W and is limited by experimental conditions. In addition, CH 4 conversion efficiency in plasma alone and plasma-catalytic is compared by introducing various catalysts includes Pt–Sn/Al 2 O 3 , BaTiO3 and HZSM-5 in single plasma discharge zone. Results revealed that plasma combined with Pt–Sn/Al 2 O 3 showed higher CH 4 conversion efficiency (84.93%) as compare to plasma alone (56.42%) using 6 mm plasma discharge gap distance at flow rates of 2 L/min, input power of 65.8 W. Moreover, maximum energy efficiency of CH 4 conversion (limited by experimental conditions) was 27.24 × 10 −12 mol/kJ at 32.6 W observed in plasma-catalyst. Analysis of the exhaust gas showed that DDBD is a promising alternative reactor not only to achieve high CH 4 conversion efficiency, but also to overcome the drawbacks of formation of undesirable byproducts. Moreover, deposition of carbon residues on the surface of internal electrode is not observed, which is often occurred in single DBD reactors.
研究领域:
环境科学
·
能源工程
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产品关联
DOI
高影响因子
AQUACULTURE NUTRITION
·
2019
·Vol. 26
·期 3
·646-656
·
IF 2.098
Hameeda Kalhoro,Shengli Tong,Lei Wang,Qingjun Shao
Taurine is a component that tends to be deficient in fish diets that contain higher plant-derivative proteins. Acanthopagrus schlegelii juveniles (IBW − 11.28 g) were fed nine diets containing SPC levels (SPC40, SPC60, SPC80 and SPC100), or supplemented with 5 g/kg of taurine at each replacement level. Our results showed higher WGR and SGR in SPC60 + TAU (WGR; 224.67, SGR; 2.10) followed by SPC40 + TAU (WGR; 221.75, SGR; 2.09). Phosphorus retention efficiency was significantly raised as the SPC increased when compared with the control diet. Taurine addition showed an incline in the nitrogen retention efficiency. An effect was observed within FR between fish and the SPC content. ADCs of dry matter, crude lipid and phosphorous were affected by SPC, while taurine addition affected only crude lipid. A significant effect was seen in ash and phosphorus by the SPC and taurine. TAU supplementation showed an increased T-AOC activity in the SPC80 + TAU (1.90), while malondialdehyde and catalase activity were reduced except in completely replaced fish meal groups. It could be concluded that black sea bream can accept the substitution of FM with 60% of SPC while at the inclusion of dietary TAU (5 g/kg) growth could be improved.
研究领域:
水产养殖
·
营养学
·
海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yiran Gu,Peng Zhu,Huapeng Zhang
Here, porous polystyrene (PS)/carbon black (CB) films were prepared using a blade coating method with different precursor liquid layer thicknesses. Firstly, the scattering efficiency, extinction efficiency, and absorption efficiency of a single air pore or CB with various diameters were simulated based on the Mie theory. Secondly, the correlation between optical properties and internal structures of porous PS/CB films was systematically characterized, relying on the color highlighting effect of CB. Thirdly, the morphological changes during the evaporation process of thicker precursor liquid layers and their corresponding internal structures were studied in depth using CB as a color marker. Thus, the formation mechanism of porous polymer films prepared by blade coating was inferred. When the polymer solution layer is thin, its evaporation process is fast, resulting in a uniform porous structure. If the polymer solution layer is thick, its evaporation time will be longer. After phase separation, the coalescence or Ostwald ripening will happen, resulting in internal defects such as cavities. Especially, as its evaporation is limited, the capillary action generated by slow and single-direction evaporation would lead to bottom collapse and repeated changes in optical appearance.
研究领域:
材料科学
·
高分子科学
·
光学
·
薄膜技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）