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Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology

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Science China Chemistry 2024年第3期67卷 963-972页

作者： Dinghong Sun Zhenyu Chen Jianfeng Zhang Wei Song jingyu Shi jintao Zhu Yuanyuan Meng fei jin Shuncheng Yang Ziyi Ge Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China Faculty of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049China Department of Chemical and Environmental Engineering University of Nottingham NingboNingbo 315100China

The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystallinity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92%. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs.

关键词： alkylbenzene side-chain morphology regulation ternary blends organic solar cells

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Long-Term, Low-Level Microwave Radiation Impairs Learning and Memory via Synbindin: Molecular Basis and Underlying Mechanism

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Biomedical and Environmental Sciences 2022年第6期35卷 552-557页

作者： YANG Zhen Zhong WU Da Wei DING Bai MA Hong Bo fei jin Xue CHENG Liang ZHAO Ya Li State Key Lab of Space Medicine Fundamentals and Application(SMFA) Astronaut Research and Training CenterBeijing 100094China

Human beings are usually exposed to microwaves originated from the equipment in industry,communication,military,and aerospace,which has led to interest in health effects of long-term low level microwave radiation exposure,particularly on the brain,one of the most sensitive organs to microwaves[1].Morris water maze,oxidative stress related typical markers of corticosteroids(CORT),malondialdehyde(MDA),catalase(CAT),superoxide dismutase(SOD)and total antioxidant capacity(TAOC),ultrastructure,dendritic spine growth and molecular signaling pathway are important indicators in the study of learning and memory effects[2].Among them,Synbindin(Sbdn),closely associated to dendritic spine growth,learning and memory,was found to be a remarkable microwave sensitive molecule in our previous work[3]..Additionally,it’s well known that both the CA1 and Dentate Gyrus(DG)regions of the hippocampus are involved in learning and memory,however studies on the effect of microwave on DG region were less,so,this paper further focused on DG region in the study of dendrite spine,ultrastructure of neurons and phospho-extracellular signal-regulated kinase(pERK)protein ***,Synbindin was focused on and the above indicators were integrated in this paper to study the influence and mechanism of long-term low-intensity 2,100 MHz microwave on learning and memory.

关键词： organs microwave originated

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Ultralow-loss (1-x)CaWO_(4)-xNa_(2)WO_(4) (x=0.1,0.2) microwave dielectric ceramic for LTCC applications

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Journal of Materiomics 2021年第5期7卷 1022-1028页

作者： Tao Sun Bin Xiao fei jin` Xinwei Xu Feng Wang Naichao Chen Xianqiang Chen Hong Wang Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhen518055China

In this work,the(1-x)CaWO_(4)-xNa_(2)WO_(4)(x=0.1,0.2,denoted as 0.9CW-0.1NW and 0.8CW-0.2NW,respectively)ultralow-loss microwave dielectric ceramics were prepared via solid-state reaction *** low melting-point Na_(2)WO_(4) as sintering aid to prepare CaW_(O4)eNa_(2)WO_(4) composite ceramics,the sintering temperature of CaWO_(4) was successfully reduced while maintaining excellent microwave *** optimal microwave dielectric properties have been achieved at 900C for 0.9CW-0.1NW ceramic:εr=9.0,Q×f=105660 GHz,tandδ=1.1×10^(-4)and tf=35.4 ppm/℃ at a frequency of 12.0 *** the 0.8CW-0.2NW ceramic,the optimal microwave dielectric properties have been obtained at 740C,withεr=8.5,Q×f=97014 GHz,tandδ=1.2×10^(-4)and tf=37.4 ppm/℃ at a frequency of 11.8 *** summary,both composite ceramics exhibit low sintering temperatures,excellent dielectric properties and chemical compatibility with the Ag *** findings of this study provide an effective approach to prepare novel composite ceramics as promising candidates for LTCC applications.

关键词： Ultralow-loss LTCC Raman spectra Microwave dielectric ceramics

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Democratic organization of the thalamocortical neural ensembles in nociceptive signal processing

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生理学报 2008年第5期60卷 669-676页

作者： LUO fei WANG jin-Yan Key Laboratary of Mental Health Institute of Psychology Chinese Academy of Sciences Beijing 100101 China

Acute pain is a warning protective sensation for any impending ***,chronic pain syndromes are often resistant diseases that may consume large amount of health care *** has been suggested by recent studies that pain perception may be formed in central neural networks via large-scale coding processes,which involves sensory,affective,and cognitive *** central areas are involved in these processes,including structures from the spinal cord,the brain stem,the limbic system,to the ***,chronic painful diseases may be the result of some abnormal coding within this network.A thorough investigation of coding mechanism of pain within the central neuromatrix will bring us great insight into the mechanisms responsible for the development of chronic pain,hence leading to novel therapeutic interventions for pain management.

关键词：神经系统疼痛处理方法临床分析

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Effects on the Behavior and Neuroimmunity of Pulsed Microwaves with Different Peak Densities

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Biomedical and Environmental Sciences 2018年第12期31卷 893-897页

作者： YANG Zhen Zhong WU Da Wei MA Hong Bo fei jin Xue ZHAO Ya Li State Key Lab of Space Medicine Fundamentals and Application China Astronaut Research and Training Center

Pulsed microwaves are widely used inradar,navigation, and communication. The average power density is low at narrow pulse widths or large pulse intervals,but pulsed microwaves at certain peak densities exert numerous ... 详细信息

关键词： Effects on the Behavior and Neuroimmunity of Pulsed Microwaves with Different Peak Densities

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Morphologies of solid-liquid interface and surface steps during rapid growth of BaB_2O_4 single crystals

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Science China(Physics,Mechanics & Astronomy) 2007年第4期50卷 539-545页

作者： PAN XiuHong, AI fei, jin WeiQing, LIU Yan & ZHANG Ying Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 1. Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

The evolution of solid-liquid interface during BBO single crystal growth was stud- ied by the differential interference microscopy. And the step morphology on (0001) surface of the as-grown crystal was observed by the atomic force microscopy as well. It was found that the transition from a flat solid-liquid interface to a skeletal shape will occur in case of rapid growth. However, AFM images of surface steps revealed morphology differences correlated with crystallographic directions. The steps advancing along direction form the step flow, whereas those steps propagating along direction shape into step segments. Measurements of step heights by AFM indicated that it is the high anisotropy of the dimension of growth unit and step bunching due to the enlargement of concentration difference along the surface that results in the anisotropy of step morphologies.

关键词： crystal growth morphological instability growth step AFM observation

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Distinct facets to enhance the process of hydrogen production via methanol steam reforming-a review

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Energy Storage and Saving 2022年第1期1卷 53-69页

作者： Hangyu Yu Yuanzhi Li Chao Xu fei jin Feng Ye Xin Li Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of MOE North China Electric Power UniversityHuilongguanBeijing102206China Key Laboratory of Solar Thermal Energy and Photovoltaic System Institute of Electrical EngineeringChinese Academy of SciencesBeijing100190China

Methanol steam reforming manifests great potential for generating hydrogen owing to its lower reaction temper-ature(200-300°C)and higher hydrogen/carbon ratio comparing with ethanol and methane *** this case,methanol steam reforming is applied in various renewable energy systems to assist the energy conversion and improve the system *** performance of methanol steam reforming reaction strongly depends on the catalysts and reactor *** this paper,the development of the copper-based,the noble metal-based and the nanomaterial catalysts were summarized by analyzing the effects of different modification methods,which indicates that cutting the cost and simplifying the manufacturing process are the future goal of catalyst ***,the reaction mechanism of different catalyst types was *** the reactor performance,conventional,miniature,micro,and membrane reactors were discussed and compared,where conventional reac-tor with high CO tolerance is more suitable for industrial application while membrane reactor with high H 2 purity and compact structure is ideal for fuel cell *** integration of the methanol steam reforming system into renewable power systems was reviewed as *** steam reforming technology is of great potential in exhaust heat recovery,cogeneration system and other renewable energy field,where more comprehensive researches should be performed.

关键词： Methanol steam reforming Catalyst modification Reactor design System integration Hydrogen

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High energy density and superior charge/discharge efficiency polymer dielectrics enabled by rationally designed dipolar polarization

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Journal of Materiomics 2023年第3期9卷 601-608页

作者： Zizhao Pan Yupeng Pan Li Li Xinwei Xu Jiufeng Dong fei jin Liang Sun Yujuan Niu Chen Xu Hong Wang Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055GuangdongChina Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices&Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and TechnologyShenzhen518055GuangdongChina Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen518055GuangdongChina

Although many dielectric polymers exhibit high energy storage density(Ue)with enhanced dipolar polarization at room temperature,the substantially increased electric conduction loss at high applied electric fields and high temperatures remains a great ***,we report a strategy that high contents of medium-polar ester group and end-group(St)modification are introduced into a biode-gradable polymer polylactic acid(PLA)to synergistically reduce the loss and enhance Ue and charge-discharge efficiency(h).The resultant St-modified PLA polymer(PLA-St)exhibits an Ue of 6.5 J/cm^(3)with an ultra-high h(95.4%),far outperforming the best reported dielectric *** is worth noting that the modified molecular structures can generate deep trap centers and restrict the local dipole motions in the polymer,which are responsible for the reduction of conduction loss and improvements in high-temperature capacitive *** addition,the PLA-St polymer shows intrinsically excellent self-healing ability and cyclic stability surviving over 500000 charge-discharge *** work offers an efficient route to next-generation eco-friendly dielectric polymers with high energy density,low loss,and long-term stability.

关键词： Dielectric polymers Enhanced dipolar polarization End-group modification Self-healing ability Long-term stability

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LncRNA-mediated posttranslational modifications and reprogramming of energy metabolism in cancer

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Cancer Communications 2021年第2期41卷 109-120页

作者： Yue-Tao Tan jin-fei Lin Ting Li Jia-Jun Li Rui-Hua Xu Huai-Qiang Ju Department of Medical Oncology Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhouGuangdong 510060P.R.China Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer Chinese Academy of Medical SciencesGuangzhouGuangdong 510060P.R.China

Altered metabolism is a hallmark of cancer,and the reprogramming of energy metabolism has historically been considered a general phenomenon of *** is well recognized that long noncoding RNAs(lncRNAs)regulate energy metabolism in ***,lncRNA-mediated posttranslational modifications and metabolic reprogramming are unclear at *** this review,we summarized the current understanding of the interactions between the alterations in cancer-associated energy metabolism and the lncRNA-mediated posttranslational modifications of metabolic enzymes,transcription factors,and other proteins involved in metabolic *** addition,we discuss the mechanisms through which these interactions contribute to tumor initiation and progression,and the key roles and clinical significance of functional *** believe that an in-depth understanding of lncRNA-mediated cancer metabolic reprogramming can help to identify cellular vulnerabilities that can be exploited for cancer diagnosis and therapy.

关键词： cancer metabolism enzyme long noncoding RNA metabolic reprogramming posttranslational modification

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Successively Regioselective Electrosynthesis and Electron Transport Property of Stable Multiply Functionalized[60]Fullerene Derivatives

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Research 2020年第1期2020卷 283-291页

作者： Xing-Xing Yan Bairu Li Hao-Sheng Lin fei jin Chuang Niu Kai-Qing Liu Guan-Wu Wang Shangfeng Yang Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter ChemistryCenter for Excellence in Molecular Synthesis of CASand Department of ChemistryUniversity of Science and Technology of ChinaHefeiAnhui 230026China Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy Conversionand Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui 230026China State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhouGansu 730000China

With the recent advance in chemical modification of fullerenes,electrosynthesis has demonstrated increasing importance in regioselective synthesis of novel fullerene ***,we report successively regioselective synthesis of stable tetra-and hexafunctionalized[60]fullerene *** cycloaddition reaction of the electrochemically generated dianions from[60]fulleroindolines with phthaloyl chloride regioselectively affords 1,2,4,17-functionalized[60]fullerene derivatives with two attached ketone groups and a unique addition pattern,where the heterocycle is rearranged to a[5,6]-junction and the carbocycle is fused to an adjacent[6,6]-*** addition pattern is in sharp contrast with that of the previously reported biscycloadducts,where both cycles are appended to[6,6]-*** obtained tetrafunctionalized compounds can be successively manipulated to 1,2,3,4,9,10-functionalized[60]fullerene derivatives with an intriguing“S”-shaped configuration via a novel electrochemical ***,the stability of tetrafunctionalized[60]fullerene products allows them to be applied in planar perovskite solar cells as efficient electron transport layers.

关键词： synthesis successively addition

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