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The effect of interfacial diffusion on device performance of polymer solar cells: a quantitative view by active-layer doping

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Science China Chemistry 2015年第2期58卷 317-322页

作者： Li Nian Jiadong Zhou Kai Zeng xiaoyan Wu Linlin Liu Zengqi Xie fei Huang Yuguang Ma Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology

The diffusion of constituent materials at interfaces is one of the key factors for device performance and stability. In this work, the effect of interfacial diffusion of a classic interfacial material PFN on device performance of polymer solar cells was studied quantitatively by doping PFN into active layer based on P3HT：PC61BM blend. The PCEs of devices with 550 ppm PFN de- crease to half compared to those of the control devices without PFN, which are mainly attributed to the decrease of short-circuit current （Jsc） and fill factor （FF）. Advanced analyses of equivalent circuit, absorption spectra, and atomic force mi- croscopy indicates that the presence of PFN in the active layer increases the leakage current, decreases the aggregation of P3HT, and reduces the phase separation. This research reveals the physical mechanism of interfacial diffusion in device per- forrnance and provides a basis for further improving the performance and stability of PSCs.

关键词： bulk-heterojunction solar cells interfacial diffusion PFN stability degradation

Unveiling the rolling texture variations ofα-Mg phases in a dual-phase Mg-Li alloy

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Journal of Magnesium and Alloys 2024年第6期12卷 2557-2568页

作者： xiaoyan Li Luyao Jiang fei Guo Yanlong Ma Hang Yu Qiuyu Chen Haiding Liu Dingfei Zhang College of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054China Chongqing Materials Research Institute Co. Ltd.Chongqing 400707China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

LZ91 Mg-Li alloy plates with three types of initial texture were rolled by 70%reduction at both room temperature and 200℃to explore the rolling texture formation ofα-Mg *** results showed that the rolling texture is largely affected by the initial *** the samples exhibited two main texture components as RD-split double peaks texture and TD-split double peaks texture after large strain *** intensity of the two texture components was strongly influenced by the initial orientation and rolling *** twinning altered the large-split non-basal orientation to a near basal one at low rolling *** basal orientation induced by twinning is unstable,which finally transmitted to the RD-split *** strong TD-split texture formed due to slip-induced orientation transition from its initial *** competition between prismatic and basal slip determined the intensity and tilt angle of the TD-split *** increasing the rolling temperature,the TD-split texture component was enhanced in all three *** of extension twinning behavior and the promotion of prismatic slip at elevated temperature are the main reasons for the difference in hot and cold rolling texture.

关键词： Magnesium-lithium alloys Rolling texture Extension twinning Slip competition

Sequencing and comparative analysis of soybean mitochondrial genomes between the cytoplasmic male sterility line and its maintainer

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Sequencing and comparative analysis of soybean mitochondrial...

Vapor deposition of aluminium oxide into N-rich mesoporous carbon framework as a reversible sulfur host for lithium-sulfur battery cathode

第十一届全国植物基因组学大会

作者： Limei Zhao~1,Hongkun Zhao~1,Qiyun Li~1,xiaoyan fei~1,Yuqiu Li~1,Fulong Huang~1,Rentao Song~2,Yuanping Tang~2,Yinshan Dong~(1*) 1 Jilin Academy of Agricultural Sciences,1363 Caiyu Street,Changchun,Jilin China,13003 2 Biological Science School,Shanghai University,99 Shangda Road,Shanghai China,200444

Cytoplasmic male sterility(CMS) is a frequently encountered phenotype in flowering plants that is caused by mutations in mitochondrial *** approaches have been used to locate mitochondrial DNA(mtDNA) regions capable o...

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Nano Research 2021年第1期14卷 131-138页

作者： fei Sun Zhibin Qu Hua Wang xiaoyan Liu Tong Pei Rui Han Jihui Gao Guangbo Zhao Yunfeng Lu School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Shanghai Normal UniversityShanghai 150001China Department of Chemical and Biomolecular Engineering University of CaliforniaLos AngelesCA 90095USA

Restraining the shuttle effects of lithium polysulfides is the key to improve the cycling reversibility and stability of lithium-sulfur(Li-S)batteries for which design of robust sulfur hosts has been regarded as the most effective *** this work,we report a new type of hybrid sulfur host which is composed of Al_(2)O_(3) homogenously decorated in nitrogen-rich mesoporous carbon framework(NMC-Al_(2)O_(3)).The NMC-Al_(2)O_(3) hybrid host features a poly-dispersed spherical morphology and a mesoporous configuration with high surface area and large pore volume that can accommodate a high sulfur content up to 73.5 wt.%.As a result,the fabricated NMC-Al_(2)O_(3)-S cathode exhibits all-round improvements in electrochemical properties in term of capacities(1,212 mAh·g^(-1)at 0.2 C;755 mAh·g^(-1)at 2 C),cycling charge-discharge reversibility(sustainably 100%efficiencies)and stability(1,000 cycles with only 0.023%capacity decay per cycle at 0.5 C).By contrast,the Al_(2)O_(3)-free NMC-S cathode shows both decreased capacities and rapidly descending Coulombic efficiencies during *** functional theory(DFH")calculations further reveal that the implanted Al_(2)O_(3) can greatly enhance the chemical adsorption and catalytic conversion for various lithium polysulfides and thereby effectively prevent the polysulfide shuttling and significantly improve the utilizability,reversibility and stability of sulfur cathode.

关键词： lithium-sulfur battery aluminium oxide sulfur host nitrogen-rich carbon mesoporous structure

Development and validation of the NCC‐BC‐A scale to assess patient‐reported outcomes for breast cancer patients in China

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Cancer Innovation 2024年第6期3卷 45-57页

作者： fei Ma xiaoyan Yan Xiuwen Guan Tianmou Liu 无 National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Clinical Research Institute Institute of Advanced Clinical MedicinePeking UniversityBeijingChina Department of Epidemiology and Biostatistics School of Public HealthPeking UniversityBeijingChina PRO‐BC China Standards Committee

Background:The commonly used international patient‐reported outcome scales for breast cancer were developed before the advent of multiple targeted therapies and immunotherapies,rendering them potentially insufficient for current clinical ***,it is necessary to develop a specific patient‐reported outcome scale tailored for breast cancer patients in China to optimize the management model for these ***:A comprehensive literature search was performed in the PubMed,Embase,Wanfang,and CNKI databases to extract dimensions and items for a potential patient‐reported outcome *** Delphi method was used to modify,add,subtract,and adjust the language of items until the experts reached a consensus on the first *** draft was further refined using a cognitive test and a *** optimized scale was used for a formal survey,and the items were further analyzed and screened using metrics such as the coefficient of variation,correlation coefficient,internal item consistency,factor analysis,reliability,and ***:A total of 10,954 articles were analyzed,and 237 were used to create a pool of 277 patient‐reported outcome *** two rounds of Delphi expert consultation,the experts'authority coefficients were 0.739 and *** a cognitive test,several items were adjusted to enhance *** adjustments were made following a presurvey of 200 advanced breast cancer patients,resulting in a 38‐item patient‐reported outcomes scale,termed NCC‐BC‐*** the national formal survey,588 advanced breast cancer patients *** component analysis showed good consistency among the items and sufficient difference between the *** results were normally distributed with good *** Cronbach'sαcoefficient of the scale was 0.925 and the test–retest reliability was ***:The NCC‐BC‐A scale has high validity and *** comprehensively considered the characteristics of systemic trea

关键词： breast cancer patient‐reported outcome quality of life

Prevention of peripherally inserted central catheter-related infections in very low-birthweight infants by using a central line bundle guideline with a standard checklist

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International Journal of Nursing Sciences 2016年第1期3卷 50-53页

作者： Chen Yuan Qing Zhao xiaoyan Song fei Meng Qingdao Center Medical Group QingdaoShandong ProvinceChina

Objective:To investigate the effectiveness and feasibility of using a central line bundle(CLB)guideline with a standard checklist in the prevention of peripherally inserted central catheter(PICC)-related infections(CRIs)in very low-birth-weight infants(VLBWIs).Methods:Fifty-seven VLBWIs who underwent PICC insertion at a hospital in Qingdao,China,between November 2012 and June 2013,were monitored with the CLB guideline and a standard ***-three VLBWIs who underwent PICC insertion were monitored by standard hospital *** incidence of CRIs was compared between the two ***:The incidence of infection significantly decreased from 10.0%catheter days in the control group to 2.2%catheter days in the study group(p<0.05).The indwelling catheter time significantly increased in the study group compared to the control group(31.9±15.0days vs.24.8±7.4 days,respectively,p<0.05).Colonization infections also decreased from 6.9% catheter days in the control group to 2.2%catheter days in the study group(p<0.05).The incidence of catheter-related bloodstream infections decreased from 3.1%catheter days in the control group to 0%catheter days in the study ***:The use of a CLB guideline with a standard checklist could be an effective and feasible protocol for preventing CRIs and prolonging indwelling catheter timein VLBWIs.

关键词： Central line bundle Checklist Very low birth weight infant PICC Catheter related infection

4H-Si C monolithic Darlington transistors with slight current gain drop at high collector current density

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Science China(Technological Sciences) 2018年第8期61卷 1238-1243页

作者： YUAN Lei SONG QingWen TANG xiaoyan ZHANG HongPeng ZHANG YiMeng YANG fei GUO LiXin ZHANG YiMen ZHANG YuMing Key Laboratory of Wide Band Gap Semiconductor Materials and Devices School of Microelectronics Xidian University State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co. Ltd. School of Physics and Optoelectronic Engineering Xidian University

Profit from high current gain features, 4 H-Si C power Darlington transistor has the capacity for handling high current transmission. In this paper, monolithic Darlington transistors were fabricated using a simultaneous formation process for both n-type(emitter) and p-type(base) ohmic contact. The isolated device shows current gain of 1061 and 823 with collector current density(JC) increasing from 200 to 800 A/cm2, exhibiting a slight current gain drop at high JC. By extracting the interface state density(Dit) between Si O2 and p-type 4 H-Si C, it is found that this advantage owes to the improvement of the shallow bulk minority carrier lifetime in base region. Furthermore, ISE-TCAD(technology computer aided design) simulation was carried out to study the relationship between base minority lifetime and the current gain, from which the total base minority lifetime is estimated to be 48 ns. The open base breakdown voltage(BVCEO) is 850 V at a leakage current of 2 μA due to the electric filed crowding at the isolation bottom between drive bipolar junction transistor(BJT) and output BJT. To solve this, non-isolated devices were also fabricated with improved BVCEOof 2370 V, indicating the superior potential of 4 H-Si C monolithic Darlington transistors for high power application, while the current gain is deceased to 420, which needs further improvement.

关键词： monolithic Darlington transistors Gummel characteristic lifetime improvement breakdown voltage

Aptamer-based cell-free detection system to detect target protein

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Synthetic and Systems Biotechnology 2021年第3期6卷 209-215页

作者： Junhong Chen xiaoyan Zhuang Jiyang Zheng Ruofan Yang fei Wu Aihui Zhang Baishan Fang XMU-China Team Xiamen UniversityXiamen361005PR China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005PR China The Key Laboratory for Chemical Biology of Fujian Province Key Lab for Synthetic Biotechnology of Xiamen CityXiamen UniversityXiamen361005PR China

Biomarkers of disease,especially protein,show great potential for diagnosis and *** detecting a certain protein,a binding assay implementing antibodies is commonly ***,antibodies are not thermally stable and may cause false-positive when the sample composition is *** recent years,a functional nucleic acid named aptamer has been used in many biochemical analysis cases,which is commonly selected from random sequence libraries by using the systematic evolution of ligands by exponential enrichment(SELEX)*** to antibodies,the aptamer is more thermal stable,easier to be modified,conjugated,and ***,an Aptamer-Based Cell-free Detection(ABCD)system was proposed to detect target protein,using epithelial cell adhesion molecule(EpCAM)as an *** combined the robustness of aptamer in binding specificity with the signal amplification ability of CRISPR-Cas12a′s trans-cleavage activity in the ABCD *** also demonstrated that the ABCD system could work well to detect target protein in a relatively low limit of detection(50-100 nM),which lay a foundation for the development of portable detection *** work highlights the superiority of the ABCD system in detecting target protein with low abundance and offers new enlightenment for future design and development.

关键词： Aptamer CRISPR-Cas Protein detection Biomarker

Circadian Rhythm of Calling Behavior in the Emei Music Frog(Babina daunchina) is Associated with Habitat Temperature and Relative Humidity

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Asian Herpetological Research 2011年第3期2卷 149-154页

作者： Jianguo CUI xiaoyan SONG Guangzhan FANG fei XU Steven E. BRAUTH Yezhong TANG Chengdu Institute of Biology Chinese Academy of Sciences Sichuan Institute of Animal Sciences Department of Psychology University of MarylandCollege Park

Generally, the function of vocalizations made by male anurans are to attract females or defend resources. Typically, males vocalize in choruses during one or more periods in a twenty-four-hour cycle, which varies, however, among species. Nevertheless, the causal factors influencing circadian variations of calling patterns in anuran species are not clear. In this study, male chorus vocalizations were monitored in the Emei music frog(Babina daunchina) for 17 consecutive days during the breeding season, while its habitat air temperature and relative humidity in the course of experiments were measured as well. The results revealed that the circadian calling patterns were characterized by two periods of peak vocalization, which were observed from 0500 h to 0700 h and from 1300 h to 2000 h, while the lowest activity period was found from 2100 h to 2200 h. Both calls/h and notes/h were positively correlated with air temperature and negatively with relative humidity. Overall, our data indicate that the Emei music frogs(B. daunchina) could regulate their vocal activities based on the changes of physical micro-environment(e. g., temperature or humidity) to maximize reproductive success.

关键词： rest-activity cycle advertisement call temperature humidity Emei music frog(Babina daunchina