Science China-Physics Mechanics & Astronomy
·
2026
·Vol. 69
·期 10
·107311
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IF 7.2
Lin Weibin,You Yiqi,Lin Haiyan,Yu Kuibao,Lin Zhihan,Yu Yongshen,Li Fushan,Hu Hailong
Quantum dot light-emitting diodes (QLEDs) with high external quantum efficiency (EQE) are attractive candidates for wearable integrated displays. However, the pursuit of high power efficiency—especially high EQE at low operating voltages-has long been hampered by interlayer charge injection barriers and inefficient intralayer charge transport. Here, we report a rational strategy to construct a submonolayer (sub-ML) quantum dot (QD) emissive layer (EML) using Langmuir-Blodgett assembly. We fabricate a closely packed monolayer of QD/NaYF 4 hybrid nanoparticles (NPs), wherein each QD is precisely positioned to establish direct contact with both the electron transport layer (ETL) and hole transport layer (HTL), thus eliminating vertical charge transport between adjacent QDs. Critically, partial replacement of QDs with insulating NaYF 4 NPs introduces localized electrostatic fields via embedded equivalent nanocapacitors, which substantially enhances the hole injection level. The sub-ML QLEDs realize efficient sub-bandgap-voltage emission, delivering a practical luminance of 585 cd m −2 at a low driving voltage of 1.8 V. These devices exhibit a maximum external power efficiency of 23.7% and a power efficiency of 40.37 lm W −1 , representing 56% and 87% improvements, respectively, over optimized monolayer QLEDs. Our approach offers a viable solution to the long-standing efficiency-voltage trade-off, paving the way for the development of low-power, high-performance QLEDs.
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Regenerative Biomaterials
·
2025
·
IF 8.1
Kang Shaoyang,Ding Sheng,Lyu Donghao,Gao Rui,Peng Sirui,Liu Jing,Zhang Chuangnian,Feng Zujian,Huang Pingsheng,Kong Deling,Wang Weiwei
Artificial energy supply modules that can produce adenosine triphosphate (ATP) through natural or synthetic structures, are crucial for supporting artificial cells with therapeutic purposes. However, their advanced biomedical application is hindered by poor stability, short lifespan and low output efficiency. In this study, an artificial light-controlled energetic module with long-term activity, termed thylakoid-loaded microgel (TM), is created by encapsulating spinach-derived thylakoid into alginate/gelatin microgels. The TM effectively retains the photosynthetic light reactions of thylakoids, including the electron transfer capacity of photosystem II and ATP production, and releases the produced ATP to external environment. As a proof of concept, the TM successfully drives the luciferin/luciferase reaction both within and outside the microgel compartment. In addition, the encapsulated thylakoids exhibit a significantly prolonged activity, with the high photosystem II activity and ATP production lasting for at least 96 hours. The long-term activity is attributed to the oxidation shielding efficacy, protein and pigment degradation inhibition, and membrane structural stabilization. This study presents a strategy for developing artificial energy supply modules with efficient energy output and long-term activity, holding great promise in artificial cell construction and biosynthesis.
研究领域:
合成生物学
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生物能源
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生物医学工程
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光合作用研究
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生物材料
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PubMed
高影响因子
CHEMICAL GEOLOGY
·
2025
·
IF 3.6
Chaorong Chen,Sailan Wang,Yixuan Yang,Gaofeng Wang,Jing Liu,Qingze Chen,Fei Ge,Runliang Zhu
Ferrihydrite is an important geosorbent and catalyst that is ubiquitous in natural environments, and plays a critical role in regulating the speciation and migration of hexavalent chromium (Cr(VI)). Phosphate has a strong affinity for ferrihydrite surfaces, but it remains unclear how phosphate influences the immobilization of Cr(VI) by ferrihydrite in sunlight-influenced surface environments. Herein, the surface interactions of ferrihydrite and Cr(VI) in the presence of phosphate were studied under mercury lamp irradiation. Results showed that mercury lamp irradiation significantly attenuated the inhibitory effect of phosphate on Cr(VI) removal by ferrihydrite compared to that under dark conditions. X-ray photoelectron spectroscopic (XPS) analysis revealed that Cr(III) was the predominant chromium species immobilized on ferrihydrite surfaces. Specifically, the reduction of Cr(VI) produced CrPO 4 precipitates, whereas the released Fe(III) can also co-adsorb with phosphate (i.e., FePO 4 ) onto ferrihydrite surfaces. The reduction of Cr(VI) mediated by the generated Fe(II) species and photoelectrons effectively reduces the electrostatic repulsion between Cr(VI) and phosphate, thereby enhancing the immobilization of these two ions on ferrihydrite. Energy dispersive X-ray spectrometer (EDS) results provide direct quantitative evidence that mercury lamp irradiation substantially enhances the immobilization of Cr(VI) and phosphate by ferrihydrite. The above-described results account for the effect of phosphate on the light-induced coupling process of ferrihydrite reductive dissolution and Cr(VI) reductive immobilization, advancing our understanding of the geochemical cycle of Cr(VI) pollution in sunlight-influenced surface environments.
研究领域:
环境化学
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地球化学
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污染修复
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光催化
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·
IF 3
Feng Tianxu,Shan Wei,Zhang Yongzhou,Huang Haibo,Tang Hua
Solar photocatalytic degradation and adsorption using metalorganic frameworks (MOFs) offer safe and energy-efficient remediation for water contaminated with small organic pollutants, leveraging their semiconductor-like tunable band structures and inherent porosity. This study reports the de novo synthesis of a visible-light-responsive Ti@Ce MOF heterojunction composite for synergistic photocatalytic degradation and adsorption of recalcitrant organic contaminants. An in-situ growth strategy deposited NO.-functionalized UiO-66(Ce) onto NH 2 -modified MIL-125, forming an S-scheme heterojunction engineered for efficient visible-light-driven hydrogen peroxide (H 2 O 2 ) generation. This in-situ photogenerated H 2 O 2 acts as a potent oxidant, effectively degrading tetracycline. A significantly enhanced photocatalytic degradation rate constant ( k ) for tetracycline was observed, indicating boosted catalytic activity. Mechanistic analysis underscores the critical role of the S-scheme heterojunction in promoting charge carrier separation and enhancing H 2 O 2 production, thereby efficiently driving organic pollutant oxidative degradation. This work provides a novel strategic framework for designing multifunctional MOF composites, advancing high-performance, sustainable water purification technologies.
研究领域:
环境科学
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材料化学
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光催化
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水净化
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纳米材料
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Hui Huang,Xuan Yang,Jialong Zhao,Ruosheng Zeng,Tao Lin
Luminescent solar concentrators (LSCs) are limited by intrinsic escape-cone losses that reduce their light-harvesting efficiency. In this work, we introduce a strip-array waveguide design that enhances light trapping to 85%, exceeding the theoretical limit imposed by total internal reflection (TIR). Using tetramethylammonium manganese chloride (TMAMnCl3) as the fluorophore, the device achieves an optical efficiency of 7.9% and a corresponding solar power conversion efficiency of 4.4% when all four edges are coated. The improved performance is attributed to reduced escape-cone loss, suppressed scattering, and a broad absorption spectrum (300–550 nm) that aligns with the high-intensity region of the solar spectrum. A stamping-assisted fabrication approach enables straightforward pattern definition and is compatible with various polymer matrices and emissive materials, offering a scalable route toward integrated LSC–PV devices.
研究领域:
光伏技术
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光学材料
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可再生能源
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纳米光子学
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 10
·4082
·
IF 4.6
Jinbo Yang,Xiangxue Cao,Lanfeng Wei,Jianshu Zhang,Jinli Zhang,Ping Liu,Liang Xu,Pengfei Li
Herein, a four-coordinated organoboron compound, aminoquinoline diarylboron (AQDAB), is utilized as the photocatalyst in the oxidation of silane to silanol. This strategy effectively oxidizes Si–H bonds, affording Si–O bonds. Generally, the corresponding silanols can be obtained in moderate to good yields at room temperature under oxygen atmospheres, representing a green protocol to complement the existing preparation methods for silanols.Keywords:photocatalytic oxidation;silane;silanol;aminoquinoline diarylboron
研究领域:
有机化学
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光化学
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催化
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绿色化学
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高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Sheng Wu,Puxian Xiong,Dongliang Jiang,Quan Liu,Ke Zhang,Binli Xiao,Yan Chen,Yinzhen Wang
An activator’s selective occupation of a host is of great significance for designing high-quality white light-emitting diode phosphors, while achieving a full-spectrum single-phase white light emission phosphor is challenging. In this study, a boron phosphate solid-solution Na2Y2(BO3)2–x(PO4)xO:0.005 Bi3+ (NYB2–xPxO:0.005 Bi3+) white phosphor was designed by selectively occupying Bi3+ activators in the mixed anionic groups. The substitutes of the anionic unit (BO3)3– by the (PO4)3– unit are supposed to force part of the Bi3+ ion to enter the Na lattice site, which produces an intense orange-red emission peaked at 590 nm. In parallel, spectral tuning from blue to white light and an internal quantum efficiency of 56.42% was obtained, and the thermal stabile luminescence intensity remains at 94.2% of the initial intensity after four heating–cooling cycles from 30 to 210 °C (luminescent intensity is 83.6% of room temperature (RT) at 150 °C, with excellent thermal stability and recovery performance). Finally, an excellent color rendering index (Ra = 90.8 and R9 = 85) was demonstrated for white light-emitting diode devices using only an NYB1.5P0.5O:0.005 Bi3+ phosphor and a near-ultraviolet (n-UV) 365 nm LED chip. This work delves into the different selective occupancy of Bi3+ ions and explores a new avenue for the design of phosphors for full-spectrum white light emission.
研究领域:
材料科学
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光电技术
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光子学
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固态照明
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Xuyong Tao,Boyan Liu,Guoqing Tong,Hanwen Zhu,Junchun Li,Yuanyuan Sheng,Chengyun Wu,Yajing Chang,Yangqing Wu,Yang Jiang
Ligand exchange has been demonstrated as an efficient strategy to improve the photoluminescence quantum yield (PLQY) and stability of quantum dots (QDs). Long-term illumination can considerably accelerate the ligand desorption after ligand exchange because of the weak bonding between the ligand and QDs. Here, a novel light-driven luminescence evolution strategy in combination with ligand exchange is devised by using N-acetyl-l-cysteine (NAC) as a ligand. NAC is expected to coordinate with the uncoordinated Pb2+ to improve the bonding between NAC and QDs. Light illumination is employed to accelerate the digestive ripening process and realize the uniform distribution of QDs. On the basis of the synergistic effect of NAC ligand exchange and light illumination, the CsPbBr3 QDs show reduced surface defects with nearly 100% PLQY and remarkable stability in polar solvents. Furthermore, a white light-emitting diode is demonstrated with a high rendering index of 80.7 and color temperature of 5595 K.
研究领域:
材料科学
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光电技术
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纳米技术
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 4
·2437-2445
·
IF 3.361
Heng Xu,Jianghu Liang,Zhanfei Zhang,Zihao Deng,Yuankun Qiu,Maosheng He,Jianli Wang,Yajuan Yang,Chun-Chao Chen
Cesium lead halide perovskite nanocrystals (NCs) have attracted extensive attention for photoelectric device application due to their excellent optoelectronic properties. However, the toxicity of lead has hindered their commercialization. Consequently, lead free cesium metal halide NCs have been developed, but these materials suffer from low photoluminescence quantum yield (PLQY) and poor stability. Here, a new class of lead-free non-perovskite blue-emitting cesium bromine (CsBr) and cesium iodine (CsI) halide NCs are realized by zinc doping. High PLQYs of 79.05% and 78.95% are achieved by CsBr:Zn and CsI:Zn NCs, respectively, attributed to the improved local structural order and reduced strain between the lattices of the NCs after storing under ambient conditions for 20 to 30 days. Moreover, zinc doped cesium halide NCs show excellent air stability for at least 50 days. Our results for zinc doped cesium halide NCs have shown a new avenue to fabricate lead-free halide NCs for blue lighting and display applications.
研究领域:
材料科学
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光学工程
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高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jianning Feng,Qinxuan Cao,Jie Xue,Haipeng Lu
Four silver-lanthanide double perovskite nanocrystals, namely, Cs2AgSmCl6, Cs2AgEuCl6, Cs2AgGdCl6, and Cs2AgErCl6, were synthesized for the first time. These four double perovskites have yet to be reported in any form and are found to be metastable in the bulk phase. By using the colloidal hot-injection synthesis method, the metastable double perovskite phase can be arrested kinetically. These lead-free nanocrystals show a broadband emission owing to the self-trapped exciton recombination, with Cs2AgEuCl6 exhibiting the characteristic f–f emission from Eu3+.
研究领域:
材料科学
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光学
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DOI
高影响因子
Polymer Chemistry
·
2025
·
IF 3.9
Xiaoguang Qiao,Mengna Feng,Mengjie Zhou,Wenjie Zhang,Yanjie He,Ge Shi,Xinchang Pang
Photoinduced polymerization methods are increasingly valued for their mild operating conditions, precise spatiotemporal control, and operational simplicity. Beyond homogeneous systems, adapting photopolymerization to emulsions offers a greener and more practical approach. Nevertheless, the poor penetration of short-wavelength light sources commonly adopted in previous studies, combined with the opacity inherent to heterogeneous systems, led to inefficient light energy utilization. This work presents an efficient near-infrared (NIR) light induced miniemulsion atom transfer radical polymerization (mini-ATRP), by utilizing phosphorus and nitrogen codoped carbon dots (PN-CDs) as the photocatalyst. Owing to the absorption in the NIR region, PN-CDs can generate electrons upon excitation with an 808 nm laser, thereby initiating a mini-ATRP through electron transfer with a Cu(II)/surfactant ion-pair at the interface of oil/water droplets. This NIR induced mini-ATRP system successfully produced polymers with low dispersity (Đ < 1.25) and high monomer conversion (∼86%) within 2 hours. Excellent temporal control of the polymerization and the chain fidelity of polymers were illustrated by a light-switching experiment and chain extension, respectively. This research establishes new pathways for robust emulsion photopolymerization techniques, providing enhanced control, efficiency, and a more sustainable process.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 17
·24164-24170
·
IF 5.6
Rong-Rong He,Qiang-Qiang Zhu,Gan-Yu Cai,Ze-Tao Shen,Yue Zhai,Yu-Bin Kang,Le Wang
LED-based near-infrared (NIR) light sources are of considerable interest for advanced NIR spectroscopy technologies. However, LED "efficiency droop" presents a major challenge to achieving high-brightness NIR light. In this study, LaMgGa 11 O 19 :Cr 3+ (LMG:Cr 3+ ) ceramic was developed as a NIR color converter to achieve high-brightness laser-driven NIR light. The effects of fabrication temperature and Cr 3+ doping concentration on the luminescent properties of LMG:Cr 3+ ceramics were thoroughly investigated. Under blue light excitation, LMG:Cr 3+ ceramic exhibits a broadband NIR emission peak at 730 nm, with a high external quantum efficiency of 55.4 %. Due to its excellent heat dissipation performance and high-temperature stability, LMG:Cr 3+ ceramic can generate high-brightness NIR light, achieving an output power of 1.2 W when excited by a blue laser with power density of 7.50 W mm −2 . Finally, a laser-driven NIR light source has been successfully packaged, demonstrating the capability to meet various intelligent spectroscopy applications in biomedical imaging and non-destructive detection.
研究领域:
材料科学
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光学工程
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光子学
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固态照明
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光谱学
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高影响因子
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