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Solvent engineering in perovskite nanocrystal colloid inks for super-fine electrohydrodynamic inkjet printing of color conversion microstructures in micro-LED displays

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Chinese Chemical Letters 2025年第8期36卷

作者： Wang, Shuli Kong, Xuemin Cai, Siting Luo, Yunshu Gu, Yuxuan Fan, Xiaotong Chen, Guolong Yang, Xiao Chen, Zhong Lin, Yue Fujian Engineering Research Center for Solid-State Lighting Department of Electronic Science School of Electronic Science and Engineering Xiamen University Xiamen 361102 China Department of Physics and Electronic Engineering Jinzhong University Jinzhong 030606 China College of Internet of Things Engineering Wuxi Taihu University Wuxi 214026 China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Xiamen 361102 China

Super-fine electrohydrodynamic inkjet (SIJ) printing of perovskite nanocrystal (PNC) colloid ink exhibits significant potential in the fabrication of high-resolution color conversion microstructures arrays for full-color micro-LED displays. However, the impact of solvent on both the printing process and the morphology of SIJ-printed PNC color conversion microstructures remains underexplored. In this study, we prepared samples of CsPbBr₃ PNC colloid inks in various solvents and investigated the solvent's impact on SIJ printed PNC microstructures. Our findings reveal that the boiling point of the solvent is crucial to the SIJ printing process of PNC colloid inks. Only does the boiling point of the solvent fall in the optimal range, the regular positioned, micron-scaled, conical PNC microstructures can be successfully printed. Below this optimal range, the ink is unable to be ejected from the nozzle;while above this range, irregular positioned microstructures with nanoscale height and coffee-ring-like morphology are produced. Based on these observations, high-resolution color conversion PNC microstructures were effectively prepared using SIJ printing of PNC colloid ink dispersed in dimethylbenzene solvent. © 2025

关键词： Color conversion microstructures arrays Electrohydrodynamic inkjet printing Micro-LED display Perovskite nanocrystal Solvent

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Recent progresses on perovskite quantum dots patterning techniques for color conversion layer in micro-LED displays

Next Nanotechnology

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Next Nanotechnology 2024年 5卷

作者： Fan, Xiaotong Yang, Xiao Kong, Xuemin Zhang, Tianqi Wang, Shuli Lin, Yue Chen, Zhong Department of Electronic Science Fujian Engineering Research Center for Solid-State Lighting Xiamen University Fujian Xiamen 361005 China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Fujian Xiamen 361005 China Institute of Electromagnetics and Acoustics School of Electronic Science and Engineering Xiamen University Fujian Xiamen 361005 China

Micro light-emitting diodes (micro-LEDs) are considered crucial for the next-generation display technology. However, the high cost of large-scale transfer technology and the lack of maturity in full-color technology have hindered the availability of mature products. The perovskite quantum dot (PQD) material offers a promising solution for achieving full-color capabilities in micro-LED displays. This review article aims to provide an overview on the latest progresses on PQD full-color technology for micro-LEDs. The review covers a variety of patterning techniques, including photolithography, inkjet printing, microfluidic processing, and laser processing, as well as the research on intrinsic stability of PQDs. Finally, the current drawbacks and solutions of PQD color conversion micro-LEDs are discussed, and the future research prospects in this field are anticipated. © 2024 The Authors

关键词： Color conversion layer Full-color display Micro-LED Patterning technique Perovskite quantum dot

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Critical evaluation of extracellular polymeric substances extraction methods: Extraction efficiency, molecular characteristics, and heavy metals binding properties

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science of the Total Environment 2025年 959卷 178345页

作者： Ou, Bei Hu, Xueyang Yu, Wenbo Meng, Fanhao Li, Wen Liang, Sha Yuan, Shushan Duan, Huabo Hou, Huijie Xiao, Keke 1037 Luoyu Road Hubei Wuhan430074 China Hubei Provincial Engineering Laboratory of Solid Waste Treatment Disposal and Recycle Technology Hubei Wuhan430074 China Hubei Provincial Research Center of Water Quality Safety and Water Pollution Control Engineering Technology Hubei Wuhan430074 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Hubei Wuhan430074 China Environmental Science and Engineering Program Guangdong Technion-Israel Institute of Technology 241 Daxue Road Guangdong Shantou515063 China

Extracellular polymeric substances (EPS) significantly influence the properties and performance of waste activated sludge. Various pretreatment protocols with different extraction efficiency and characteristics of EPS have been reported, which markedly impact subsequent treatment and disposal of sewage sludge. This study systematically assesses the EPS properties from twelve extraction pretreatment methods. The organic and inorganic matters content, cell lysis, basic physicochemical property, molecular weight distribution, and fluorescence properties of extracted EPS were determined. Physical extraction methods (Centrifugation, Heat, and Ultrasound) were relatively mild, resulting in lower extraction of organic matter contents from EPS (3 Da) generation. Chemical extraction methods offered efficient EPS extraction with the different degrees of cell lysis, but it would introduce chemical reagent residues in EPS. Among those extraction methods, EPS extracted by cation exchange resin (CER) method had uniform and abundant molecular weight matters and fluorescence matters distribution. After dialysis, the residual Na and other metal elements could be significantly removed. Then, the fluorescence quenching effect of Cu(II) and Zn(II) at 400 μM on the Bound-EPS after dialysis increased up to the maximum value of 65 % and 30 %, respectively, compared to that without dialysis. It indicates that dialysis coupled with CER extracted EPS has a well extraction efficiency and can maintain the original state of EPS for the subsequent investigation. © 2024 Elsevier B.V.

关键词： Fluorescence quenching

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Even-integer Quantum Hall Effect in an Oxide Caused by Hidden Rashba Effect

arXiv

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arXiv 2024年

作者： Wang, Jingyue Huang, Junwei Kaplan, Daniel Zhou, Xuehan Tan, Congwei Zhang, Jing Jin, Gangjian Cong, Xuzhong Zhu, Yongchao Gao, Xiaoyin Liang, Yan Zuo, Huakun Zhu, Zengwei Zhu, Ruixue Stern, Ady Liu, Hongtao Gao, Peng Yan, Binghai Yuan, Hongtao Peng, Hailin Center for Nanochemistry Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing100871 China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing210000 China Department of Condensed Matter Physics Weizmann Institute of Science Rehovot7610001 Israel Center for Materials Theory Department of Physics and Astronomy Rutgers University PiscatawayNJ08854 United States Wuhan National High Magnetic Field Center School of Physics Huazhong University of Science and Technology Wuhan430074 China International Center for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Beijing100871 China

In the presence of high magnetic field, quantum Hall systems usually host both even- and odd-integer quantized states because of lifted band degeneracies. Selective control of these quantized states is challenging but essential to understand the exotic ground states and manipulate the spin textures. Here, we study the quantum Hall effect in Bi2O2Se thin films. In magnetic fields as high as 50 T, we observe only even-integer quantum Hall states, but no sign of odd-integer states. However, when reducing the thickness of the epitaxial Bi2O2Se film to one unit cell, we observe both odd- and even-integer states in this Janus (asymmetric) film grown on SrTiO3. By means of a Rashba bilayer model based on ab initio band structures of Bi2O2Se thin films, we can ascribe the absence of odd-integer states in thicker films to the hidden Rasbha effect, where the local inversion symmetry breaking in two sectors of the [Bi2O2]2+ layer yields opposite Rashba spin polarizations, which compensate with each other. In the one unit cell Bi2O2Se film grown on SrTiO3, the asymmetry introduced by top surface and bottom interface induces a net polar field. The resulting global Rashba effect lifts the band degeneracies present in the symmetric case of thicker films. © 2024, CC BY.

关键词： Quantum Hall effect

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Observation of Colossal Topological Hall Effect in Noncoplanar Ferromagnet Cr5Te6 Thin Films

arXiv

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arXiv 2023年

作者： Chen, Yequan Zhu, Yingmei Lin, Renju Niu, Wei Liu, Ruxin Zhuang, Wenzhuo Zhang, Xu Liang, Jinghua Sun, Wenxuan Chen, Zhongqiang Hu, Yongsheng Song, Fengqi Zhou, Jian Wu, Di Ge, Binghui Yang, Hongxin Zhang, Rong Wang, Xuefeng Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information Technology Anhui University Hefei230601 China School of Science Nanjing University of Posts and Telecommunications Nanjing210023 China National Laboratory of Solid State Microstructures Department of Materials Science and Engineering Nanjing University Nanjing210093 China Department of Physics Xiamen University Xiamen316005 China

The topological Hall effect (THE) is critical to the exploration of the spin chirality generated by the real-space Berry curvature, which has attracted worldwide attention for its prospective applications in spintronic devices. However, the prominent THE remains elusive at room temperature, which severely restricts the practical integration of chiral spin textures. Here, we show a colossal intrinsic THE up to ~1.6 μΩ·cm in large-area ferromagnet Cr5Te6 thin films epitaxially grown by pulsed laser deposition. Such a THE can be maintained until 270 K, which is attributed to the field-stimulated noncoplanar spin textures induced by the interaction of the in-plane ferromagnet and antiferromagnet infrastructures. Our first-principles calculations further verify the considerable Dzyaloshinskii-Moriya interaction in Cr5Te6. This work not only paves the way for robust chiral spin textures near room temperature in large-area low-dimensional ferromagnetic films for practical applications, but also facilitates the development of high-density and dissipationless spintronic devices. © 2023, CC BY.

关键词： Ferromagnetic materials

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Unconventional excitonic states with phonon sidebands in layered silicon diphosphide (Jun, 10.1038/s41563-022-01285-3, 2022)

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NATURE materials 2022年第10期21卷 1212-1212页

作者： Zhou, Ling Huang, Junwei Windgaetter, Lukas Ong, Chin Shen Zhao, Xiaoxu Zhang, Caorong Tang, Ming Li, Zeya Qiu, Caiyu Latini, Simone Lu, Yangfan Wu, Di Gou, Huiyang Wee, Andrew T. S. Hosono, Hideo Louie, Steven G. Tang, Peizhe Rubio, Angel Yuan, Hongtao National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China Max Planck Institute for the Structure and Dynamics of Matter Center for Free Electron Laser Science Hamburg Germany Department of Physics University of California Berkeley CA USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USA School of Materials Science and Engineering Peking University Beijing China Materials Research Center for Element Strategy Tokyo Institute of Technology Yokohama Japan College of Materials Science and Engineering National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing China Center for High Pressure Science and Technology Advanced Research Beijing China Department of Physics National University of Singapore Singapore Singapore School of Materials Science and Engineering Beihang University Beijing China Center for Computational Quantum Physics Simons Foundation Flatiron Institute New York NY USA

Complex correlated states emerging from many-body interactions between quasiparticles (electrons, excitons and phonons) are at the core of condensed matter physics and material science. In low-dimensional materials, quantum confinement affects the electronic, and subsequently, optical properties for these correlated states. Here, by combining photoluminescence, optical reflection measurements and ab initio theoretical calculations, we demonstrate an unconventional excitonic state and its bound phonon sideband in layered silicon diphosphide (SiP2), where the bound electron–hole pair is composed of electrons confined within one-dimensional phosphorus–phosphorus chains and holes extended in two-dimensional SiP2 layers. The excitonic state and emergent phonon sideband show linear dichroism and large energy redshifts with increasing temperature. Our ab initio many-body calculations confirm that the observed phonon sideband results from the correlated interaction between excitons and optical phonons. With these results, we propose layered SiP2 as a platform for the study of excitonic physics and many-particle effects.

关键词： Electronic properties and materials Electronic structure Optical spectroscopy Two-dimensional materials

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Synergistic Effect of Porous Layered Lanthanum Hydroxide for Efficient Br− Adsorption

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ChemNanoMat 2025年

作者： Gao, Zhixin Yan, Meng Sun, Zhen Wang, Teng Zhang, Yaoming Lin, Sen Yang, Yong State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Shaanxi Xi'an710072 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Gansu Lanzhou730000 China National Engineering Research Center for Integrated Utilization of Salt Lake Resources East China University of Science and Technology Shanghai200237 China Salt Lake Chemical Engineering Research Complex Qinghai University Qinghai Xining810000 China

Porous layered hydroxides has garnered significant attention for ion adsorption applications due to their unique combination of layered and porous structures. Herein, porous layered lanthanum hydroxide nanowires (NWs) is synthesized to efficiently adsorb Br−, utilizing the modulation of interlayer ions to optimize their performance. These NWs exhibit a porous surface structure and a positively charged surface, which increases the number of active sites and enhances their affinity for Br−. The layered hydroxide lanthanum acetate (LHL-acetate) NWs possess an adsorption capacity of 221 mg g−1, a wide range of pH suitability (from 3.0 to 10.0) and remarkable stability, surpassing many previously reported adsorbents. The superior Br− adsorption performance of LHL-acetate NWs can be attributed to the synergistic effect between ion-exchange properties of interlayer anions and surface adsorption facilitated by the porous structure, which strengthens electrostatic interactions at the adsorbent-solution interface. Impressively, these NWs achieved 100% Br− removal from simulated wastewater with varying initial concentrations and flow rates in a fixed-bed adsorption system, highlighting the effectiveness of LHL-acetate NWs for advanced Br− removal in practical applications. This study reveals the structure-reactivity relationship of porous layered lanthanum hydroxide adsorbents and offers insights for the application of such materials in the adsorption domain. © 2025 Wiley-VCH GmbH.

关键词： Molecular sieves

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Improving the performance of high-power broad-area lasers by suppressing cavity modes propagating in the lateral dimension

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Chinese Optics Letters 2023年第4期21卷 69-73页

作者：范建周旭彦张伟桥王宇飞渠红伟齐爱谊郑婉华 Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Weifang Academy of Advanced Opto-Electronic Circuits Weifang 261071China College of Future Technology University of Chinese Academy of SciencesBeijing 101408China

We first study the effect of cavity modes propagating in the lateral dimension on high-power semiconductor lasers with a large stripe width.A sidewall microstructure was fabricated to prevent optical feedback of lateral resonant ***,we demonstrate the existence of lateral resonant modes in the Fabry–Perot cavity with a large stripe ***,we design the corresponding devices and compare them with conventional broad-area diode *** a 15%reduction in threshold current and a 27%increase in maximum electro-optical conversion efficiency are *** amplified spontaneous emission spectrum is narrowed,which proves that lateral microstructures suppress optical feedback of lateral resonant *** a large continuous-wave operation,the maximum output power of laser device is43.03 W,about 1 W higher than that of the standard broad-area laser at 48 A.

关键词： high power broad area laser resonant mode amplified spontaneous emission

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Virtual Special Issue of Recent Research Advances in China: Batteries and Energy Storage

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ENERGY & FUELS 2021年第14期35卷 10945-10948页

作者： Yu, Yan Zhang, Qiang Chen, Jun Sun, Shi-Gang Hefei National Laboratory for Physical Sciences at the Microscale Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Hefei Anhui 230026 People’s Republic of China E-mail: email Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 People’s Republic of China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center (RECAST) College of Chemistry Nankai University Tianjin 300071 People’s Republic of China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) College of Chemistry and Chemical Engineering and College of Energy Xiamen University Xiamen Fujian 361005 People’s Republic of China

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Assembly of an Elastic & Sticky Interfacial Layer for Sulfide-Based All-solid-state Batteries

SSRN

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SSRN 2023年

作者： Su, Yu Liu, Xiangsi Yan, Hao Zhao, Jun Cheng, Yong Luo, Yu Gu, Jiabao Zhong, Haoyue Fu, Ang Wang, Kangjun Wang, Mingsheng Huang, Jianyu Yan, Jiawei Yang, Yong State Key Laboratory for Physical Chemistry of Solid Surface Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Pen-Tung Sah Institute of Micro-Nano Science and Technology College of Materials Xiamen University Xiamen361005 China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066004 China

All-solid-state lithium-ion batteries (ASSLBs) have recently attracted significant attention, however, two major degradation processes at the composite cathode interface in ASSLBs, including side electro-chemical reactions and morphological/structural degradation, still hinder their development seriously. To overcome the above two challenges simultaneously, we propose and demonstrate a successful assembly of an elastic & sticky interfacial layer for ASSLBs by using advanced molecular layer deposition (MLD) technique. Our spectroscopic and mechanical characterization results show that the elastic and sticky Al-GL coating layer (Young’s modulus = 0.17GPa, k = 3.300 N m-1) not only suppresses interfacial side reactions, but also enables single-crystal NCM811 particles to be in close contact with the sulfide electrolyte tightly during repeated cycles. Compared to the irreversible interfacial resistance (51.74 Ω cm-2) formed between bare NCM811 and solid electrolyte during the initial charge progress, the irreversible resistance becomes much less (11.77 Ω cm-2) after Al-GL modification. Therefore, it not only shows a capacity retention of 88.0 % of the composite electrode, which is nearly 30 % higher than bare NCM811 (59.9 %) for 100 cycles at 0.2C (1C =180 mA g-1) with a mass loading of 10.2 mg cm-2 at 30 °C. Furthermore, even with a mass loading of 20.4 mg cm-2 at 60 °C, the capacity retention of 80.0 % is obtained after 1000 cycles at 1C. This work highlights the critical role of elastic and sticky coatings in maintaining the electrochemical-mechanical integrity of composite cathode materials and provides a promising avenue for developing mechanically reliable cathode materials for ASSLBs. © 2023, The Authors. All rights reserved.

关键词： solid electrolytes

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