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NH_(4)PF_(6) assisted buried interface defect passivation for planar perovskite solar cells with efficiency exceeding 21%

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Rare Metals 2023年第10期42卷 3399-3409页

作者： xing-Dong Ding Xiao-Wen Zhou Jin-Wei Meng hao-xin Wang Tai Wu Yong Hua Cheng Chen Ming Cheng Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang212013China Yunnan Key Laboratory for Micro/Nano Materials&Technology School of Materials and EnergyYunnan UniversityKunming650091China

The buried interface defects severely affect the further enhancements of efficiency and stability of SnO_(2)-based planar perovskite solar cells(PSCs).To well tackle this problem,we propose a passivation strategy employing NH_(4)PF_6 to modify the buried interface of perovskite layer((FAPbI_(3))_(0.85)(MAPbBr_(3))_(0.15) composition) in planar *** introducing NH_(4)PF_(6),the oxygen defects on the surface of SnO_(2) film are greatly restricted due to the coordinate interaction between fluorine atoms(F) in PF_(6)^(-)and undercoordinated Sn^(4+).Meanwhile,the hydrogen bonding interaction(N-H…I) between NH_(4)PF_(6) and PbI_(2) can passivate the non-radiative charge recombination sites,significantly optimizing the quality of perovskite film,as well as the charge transfer process at the SnO_(2)/perovskite *** a result,the NH_(4)PF_(6)-modified PSC obtains a champion power conversion efficiency(PCE) of 21.11%superior to the reference device(18.46%),and the device with an active area of 1 cm^(2) achieves a PCE as high as17.38%.Furthermore,the unencapsulated NH_(4)PF_(6)-modified PSCs show good humidity stability and retain about80% of the initial PCE after 1080 h aging at the relative humidity(RH) of 35% ± 5%.

关键词： Defect passivation Interface engineering Surface charge transfer Stability Perovskite solar cells(PSCs)

Iodine-catalyzed amination of benzothiazoles with KSeCN in water to access primary 2-aminobenzothiazoles

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Chinese Chemical Letters 2022年第3期33卷 1497-1500页

作者： Yu-Shen Zhu Linlin Shi Lianrong Fu Xiran Chen xinju Zhu xin-Qi hao Mao-Ping Song College of Chemistry Zhengzhou UniversityZhengzhou 450001China

A facile and sustainable approach for the amination of benzothiazoles with KSe CN using iodine as the catalyst in water has been disclosed under transition-metal free conditions. The reaction proceeded smoothly to afford various primary 2-amino benzothiazoles in up to 96% yield. A series of control experiments were performed, suggesting a ring-opening mechanism was involved via a radical process. This protocol provides efficient synthesis of primary 2-aminobenzothiazoles.

关键词： Iodine-catalyzed Benzothiazoles KSeCN Water Primary 2-benzothiazolamines

From Mechanically Interlocked Structures to Host-Guest Chemistry Based on Twisted Dimeric Architectures by Adjusting Space Constraints

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CCS Chemistry 2022年第6期4卷 2127-2139页

作者： xin Jiang hao Yu Junjuan Shi Qixia Bai Yaping Xu Zhe Zhang xin-Qi hao Bao Li Pingshan Wang Lixin Wu Ming Wang State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunJilin 130012 Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou Key Laboratory for Clean Energy and MaterialsGuangzhou UniversityGuangzhouGuangdong 510006 College of Chemistry and Green Catalysis Center Zhengzhou UniversityZhengzhouHenan 450002

Mechanically interlocked molecules(MIMs)and host–guest chemistry have received great attention in the past few ***,it remains challenging to design architectures with mechanically interlocked features and construct cavities for guest molecule recognition using similar building *** this study,we designed and constructed a series of novel twisted supramolecular structures by assembling various multitopic terpyridine(tpy)ligands with the same diameter and Zn(II)*** obtained complexes exhibited evolutional architectures and showed distinctively different space-constraint ***,the assembled dimer SA,SB,and SBH displayed mechanically interlocked phenomena,including[2]catenane and[3]catenane,with an increase in ***,no interlocked structures were observed in complexes SC and SCH constructed by hexatopic tpy ligands due to the significant space *** single-crystal data of complex SCH further proved significant space constraints and illustrated the formation of a relatively closed cavity,which showed excellent host–guest properties for different calixarenes,especially high affinity for calix[6]arene.

关键词： self-assembly terpyridine mechanical interlocking host-guest space constraints

Therapeutic effect of placenta-derived mesenchymal stem cells on hypoxic-ischemic brain damage in rats

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World Journal of Pediatrics 2015年第1期11卷 74-82页

作者： Hong-Fang Ding Hui Zhang Hui-Fang Ding Dong Li xin-hao Yi xin-Yi Gao Wei-Wei Mou Xiu-Li Ju Department of Pediatrics Qilu HospitalShandong UniversityJinan 250012China Department of Pediatrics Shengli Oil Field Central HospitalDongying 257034China Department of Neurology Qingdao Municipal HospitalQingdao 266000China

Background:Oxidative stress is involved in the development of hypoxic-ischemic brain damage(HIBD).In this study,we investigated the therapeutic efcts of placenta-derived mesenchymal stem cells(PD-MSCs)and explored the N F-E2-related factor-2/heme oxygenase-1(Nrf2/HO-1)signaling pathway in treating ***:P7 rats were subjected to hypoxic-ischemic brain injury and randomly divided into four groups(control,HIBD,HIBD+PD-MSCs,and HIBD+fbroblasts).Forty-eight hours after the induction of HIBD,5×10^(5)of PD-MSCs were injected into cerebral tissue in the HIBD+PD-MSCs group,while the same dose of fibroblas ts were injected in the HIBD+fibroblasts *** Water Maze,gross and pathological changes were tested at *** level of malondialdehyde(MDA)was detected in rats'***-PCR and western blot analysis were used to evaluate the changes of Nrf2/***:The HIBD group showed significantly longer escape latency and a lower frequency of original platform crossing in the Morris Water M laze compared with the control *** receiving PD MSCs showed significant improvement of *** pathological changes were evident after HIBD,but ameliorated in the PD-MSCs *** with the control group,HO-1 and Nrf2 were up-regulated at gene and protein levels in the HI brain,beginning at 6 hours and peaking at 48 hours(P<0.05).The expression of HO-1 and Nrf2 in the PD-MSCs treatment group was more pronounced than in the HBD group(P<0.01).PD MSCs also decreased MDA production in the brain ***:These results demonstrate that PD-MSCs have neuroprotective effect during the treatment of HIBD and that the mechanism may be partly due to alleviating oxidative stress.

关键词： hypoxia-ischemia mesenchymal stem cells neonatal rat oxidative stress

Thermal Biology of Cold-climate Distributed Heilongjiang Grass Lizard,Takydromus amurensis

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Asian Herpetological Research 2020年第4期11卷 350-359页

作者： xin hao Shiang TAO Yu MENG Jingyang LIU Luoxin CUI Wanli LIU Baojun SUN Peng LIU Wenge Zhao College of Life Science and Technology Harbin Normal UniversityHarbin 150025HeilongjiangChina Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China College of Chemistry and Life sciences Zhejiang Normal UniversityJinhua 321004ZhejiangChina School of Chemical Engineering University of Science and Technology LiaoningAnshan 114051LiaoningChina

Thermal biology traits reflect thermal adaptations to an environment and can be used to infer responses to climate warming in animal *** a widespread genus or species,assessing the latitudinal or altitudinal gradient of thermal physiological traits is essential to reveal thermal adaptations and determine future vulnerability to climate warming *** determined the thermal biology traits of a cold-climate distributed lizard,Takydromus amurensis,and integrated published thermal biology traits within the genus Takydromus to reveal a preliminary geographical pattern in thermal *** mean selected body temperature(cloaca temperature;T_(sel)),critical thermal maximum(CT_(max)),critical thermal minimum(CT_(min)),and optimal temperature for locomotion(i.e.,sprint speed;T_(opt)) of *** were 32.6,45.1,3.1,and 33.4℃,*** resting metabolic rates of *** were po sitively related to temperature from 18℃ to 38℃.We compared the traits of tropical ***,subtropical ***,and *** with *** and found that the CT_(max) and thermal tolerance range(the difference between CT_(max) and CT_(min);TTR) increased toward high latitudes,whereas CT_(min) increased toward low latitudes in these four Takydromus *** to this preliminary pattern,we speculate the species at medium and low latitudes would be more vulnerable to extreme heat events caused by ongoing climate *** highlight the importance of integrating thermal biology traits along geographical clues,and its potential contribution to evaluate the vulnerabilities of species in the context of climate warming.

关键词： counter gradient CT_(max) CT_(min) thermal biological trait thermal tolerance range T_(sel) Takydromus

Rapid increase in warm-wet compound extreme events with high health risks in southern China:Joint influence of ENSO and the Indian Ocean

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Advances in Climate Change Research 2023年第6期14卷 856-865页

作者： Cai-Meng LIANG Liang Zhao Shun-Wu ZHOU xin-Yong SHEN Cun-Rui HUANG Yi-Hui DING Yan-Ju LIU hao-xin YAO Kai-xing ZHOU Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academyof SciencesBeijing100029China Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province Haikou 570203China Vanke School of Public Health Tsinghua UniversityBejing 100084China Institute of Healthy China Tsinghua UniversityBeijing 100084China National Climate Center China Meteorological AdministrationBejing 100081China Beijing Institute of Electronic System Engineering Bejing 100854China

High temperature and high humidity pose notable threats to the health and survival of humans,and the impact of compound extreme events involving multiple meteorological elements is usually greater than the sum of the impacts of individual extreme ***,there is limited research on the compound extreme meteorological events,defined based on the extreme of health risks rather than just the extreme of meteoro-logical elements,necessitating further investigation into their characteristics and underlying driving *** daily records of emergency ambulance dispatches from selected Chinese cities,together with daily average temperature and relative humidity data,this study identified and quantified warm-wet compound extreme events with high health risks(HRWWs)that occurred in southern China during *** revealed that HRWWs were most prevalent in the coastal region of southern *** annual frequency of HRWWs across China underwent a marked shift in 2014,with the rapid increase in recent years primarily contributed by the increase in summer HRWWs and advance and extension of the period of occurrence of HRWWs in *** analysis indicated that the changes in HRWWs in southern China during summer were primarily regulated by the EIl Nino-Southern Oscillation(ENSO)of the preceding winter and the springtime Indian Ocean basin-wide(IOBW)*** Nino and Indian Ocean warming force a reverse Walker circulation in the tropical Indian Ocean-western Pacific,strengthening the Philippine anticyclone(PAC)in *** weakens convection in the northwestern Pacific and enables the western Pacific subtropical high to extend westward over coastal areas of southern *** resulting abnormal atmospheric circulation causes prevailing subsidence over southern China,which is unfavorable for precipitation but conducive to maintaining high surface *** reduced precipitation,water vapor flux is increased owing to strengthened southwesterlies

关键词： Health risk Warm-wet compound events ENSO IOBW

The characteristics of hDPP4 transgenic mice subjected to aerosol MERS coronavirus infection via an animal nose-only exposure device

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Animal Models and Experimental Medicine 2019年第4期2卷 269-281页

作者： xin-yan hao Qi Lv Feng-di Li Yan-feng Xu Hong Gao Institute of Laboratory Animal Sciences Chinese Academy of Medical Sciences(CAMS)& Comparative Medicine Centre Peking Union Medical College(PUMC) Key Laboratory of Human Disease Comparative Medicine National Health Commission of China(NHC) Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infections

Background: Middle East respiratory syndrome coronavirus(MERS-Co V), which is not fully understood in regard to certain transmission routes and pathogenesis and lacks specific therapeutics and vaccines, poses a global threat to public ***: To simulate the clinical aerosol transmission route, h DPP4 transgenic mice were infected with MERS-Co V by an animal nose-only exposure device and compared with instillation-inoculated mice. The challenged mice were observed for 14 consecutive days and necropsied on days 3, 5, 7, and 9 to analyze viral load, histopathology, viral antigen distribution, and cytokines in ***: MERS-Co V aerosol-infected mice with an incubation period of 5-7 days showed weight loss on days 7-11, obvious lung lesions on day 7, high viral loads in the lungs on days 3-9 and in the brain on days 7-9, and 60% survival. MERS-Co V instillation-inoculated mice exhibited clinical signs on day 1, obvious lung lesions on days 3-5, continuous weight loss, 0% survival by day 5, and high viral loads in the lungs and brain on days 3-5. Viral antigen and high levels of proinflammatory cytokines and chemokines were detected in the aerosol and instillation groups. Disease, lung lesion, and viral replication progressions were slower in the MERS-Co V aerosol-infected mice than in the MERS-Co V instillation-inoculated ***: h DPP4 transgenic mice were successfully infected with MERS-Co V aerosols via an animal nose-only exposure device, and aerosol-and instillation-infected mice simulated the clinical symptoms of moderate diffuse interstitial pneumonia. However, the transgenic mice exposed to aerosol MERS-Co V developed disease and lung pathology progressions that more closely resembled those observed in humans.

关键词： animal nose‐only exposure device hDPP4 transgenic mice intranasal instillation MERS‐CoVaerosol infection

Metal-organic supramolecular nanoarchitectures by Ru(Ⅱ)bis-(terpyridine)-bridged pillar[5]arene dimers with triphenylamine

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Chinese Chemical Letters 2021年第1期32卷 357-361页

作者： Tianwei Cui Guoxing Liu Wenjing Zhang xinju Zhu Juhua Leng xin-Qi hao Pu Mao Mao-Ping Songa College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China

A metal-organic photoinduced electron transfer(PET) supramolecular nanoarchitecture comprised of Ru(Ⅱ) bis(terpyridine)-modified pillar[5]arene(electron acceptor) and triazole triphenylamine amyl cyanide(electron donor) has been designed and *** the comparison of diverse solvents and acceptors,the two conditions,i.e.,modification of pillar[5]arene to donor and weak polar solvent are benefit for the occurrence of "efficient PET" because of shorter D-A distance in the presence of pillar[5]***,the fluorescence and PET process of the supramolecular assembly could be further modulated by solvent conversion and another competitive *** study provides a supramolecular method to design and construct tunable PET systems and PET-based smart materials.

关键词： Supramolecular chemistry Pillararene Self-assemble Tunable PET Host-guest complexation

Photoelectron momentum distributions of triatomic CO_(2)molecules by circularly polarized attosecond pulses

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Chinese Physics B 2024年第10期33卷 220-225页

作者： Si-Qi Zhang Jun Zhang xin-Yu hao Jing Guo Aihua Liu Xue-Shen Liu Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China School of Physics Harbin Institute of TechnologyHarbin 150001China

Molecular-frame photoelectron momentum distributions(MF-PMDs)have been studied for imaging molecular *** investigate the MF-PMDs of CO_(2)molecules exposed to circularly polarized(CP)attosecond laser pulses bysolving the time-dependent Schrodinger equations based on the single-active-electron approximation *** showthat high-frequency photons lead to photoelectron diffraction patterns,indicating molecular *** diffractionpatterns can be illustrated by the ultrafast photoionization ***,for the driving pulses with 30 nm,a deviationbetween MF-PMDs and theoretically predicted results of the ultrafast photoionization models is produced because theCoulomb effect strongly influences the molecular ***,the MF-PMDs rotate in the same directionas the helicity of driving laser *** results also demonstrate that the MF-PMDs in a CP laser pulse are the superpositionof those in the parallel and perpendicular linearly polarized *** simulations efficiently visualize molecularorbital geometries and structures by ultrafast photoelectron ***,we determine the contribution of HOMOand HOMO-1 orbitals to ionization by varying the relative phase and the ratio of these two orbitals.

关键词： molecular-frame photoelectron momentum distributions single-active-electron approximation frames ultrafast photoionization models