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Tetraalkyl-substituted zinc phthalocyanines used as anode buffer layers for organic light-emitting diodes

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Chinese Physics B 2020年第1期29卷 417-423页

作者： Qian Chen Songhe Yang Lei Dong Siyuan Cai Jiaju xu zongxiang xu Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

Two soluble tetraalkyl-substituted zinc phthalocyanines(ZnPcs)for use as anode buffer layer materials in tris(8-hydroxyquinoline)aluminum(Alq3)-based organic light-emitting diodes(OLEDs)are presented in this *** holeblocking properties of these Zn Pc layers slowed the hole injection process into the Alq3 emissive layer greatly and thus reduced the production of unstable cationic Alq3(Alq3^+)*** led to the enhanced brightness and efficiency when compared with the corresponding properties of OLEDs based on the popular poly-(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)buffer ***,because of the high thermal and chemical stabilities of these Zn Pcs,a nonaqueous film fabrication process was realized together with improved charge balance in the OLEDs and enhanced OLED lifetimes.

关键词： organic light-emitting diode anode buffer layer metal phthalocyanine solution process

Molecularly Designed Zinc(Ⅱ) Phthalocyanine Derivative as Dopant-free Hole-transporting Material of Planar Perovskite Solar Cell with Preferential Face-on Orientation

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Molecularly Designed Zinc(Ⅱ) Phthalocyanine Derivative as D...

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Qikun Hu Minzhang Li zongxiang xu Department of Chemistry Southern University of Science and Technology

Efficient and stable hole transporting materials(HTMs) are necessary for perovskite solar cells(PSCs) with excellent efficiencies and long-term stability. Here, we prepared two A3B-type metal phthalocyanine(MPc) compounds as dopant free HTMs and employed in conventional n-i-p structured PSCs. H6Bu-ZnPc and Me6Bu-ZnPc were synthesized through ring expansion method and their exact structures were characterized by NMR and Mass spectroscopy. The molecular orientation of the developed HTM thin films against the underlying surface was studied using X-ray diffraction technique. Different substituents in MPcs can strongly affect their molecular orientation and intermolecular π-π stacking, resulting in different hole mobilities. The favored face-on molecular alignment was only observed for Me6Bu-ZnPc on perovskite layer, proving the crucial role of methyl substituents in controlling the molecular alignment through the especial interactions between the MPc molecule and different sites of perovskite material on the surface. PSCs using Me6Bu-ZnPc as dopant free HTM achieved the highest power conversion efficiency(PCE) of 17.41%, which is consistent with the observed higher short circuit current density(JSC) and fill factor(FF). With its high hydrophobicity and good coverage, Me6Bu-ZnPc HTM thin film acted as an encapsulation layer and a significantly increased long-term stability was obtained for the devices. The Me6Bu-ZnPc based devices retained over 90% of their initial PCE after 1400 hours storage at 25oC and with a relative humidity of 75%.

关键词： perovskite solar cell hole transporting material zinc(Ⅱ) phthalocyanine molecular alignment long-term stability

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 261-274页

作者： Jiaming Li Ying Qiao zongxiang Lu Wei Ma Xin Cao Rongfu Sun the Department of Electrical Engineering Tsinghua UniversityBeijing 100084China the China Suntien Green Energy Limited Company Shijiazhuang 050011China the State Grid Jibei Electric Power Company Beijing 100054China

As the proportion of renewable energy(RE)increases,the inertia and the primary frequency regulation(FR)capability of the power system ***,ensuring frequency security in the scheduling model has become a new technical requirement in power systems with a high share of *** to a shortage of conventional synchronous generators,the frequency support of multi-source converters has become an indispensable part of the system frequency resources,especially variable-speed wind turbine generation(WTG)and battery energy storage(BES).Quantitative expression of the FR capability of multi-source converters is necessary to construct frequency-constrained scheduling ***,the frequency support performance of these converter-interfaced devices is related to their working states,operation modes,and parameters,and the complex coupling of these factors has not been fully exploited in existing *** this study,we propose an integrated frequency-constrained scheduling model considering the coordination of FR capabilities from multi-source *** FR control strategies and variable FR parameters for WTG with or without reserved power are modeled,and multi-target allocation of BES capacity between tracking dispatch instruction and emergency FR is ***,the variable FR capabilities of WTG and BES are embedded into the integrated frequency-constrained scheduling *** nonlinear constraints for frequency security are precisely linearized through an improved iteration-based *** effectiveness of the proposed model is verified in a modified IEEE 24-bus standard *** results suggest that the coordinated participation of BES and WTG in FR can effectively reduce the cost of the scheduling model while meeting frequency security constraints.

关键词： Battery energy storage(BES) wind turbine generation(WTG) frequency regulation(FR) frequency security power system scheduling

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我国电力机车的发展回顾

中国铁路 2001年第2期 12-14页

作者：徐宗祥株洲电力机车厂

综述了我国电力机车40多年来从客货两用到货运重载、客运高速的分离,从直流传动到交流传动,从电力机车到电动车组,从满足国内市场需求到进入国际市场,实现了重大跨越。

关键词：电力机车电动车组交流传动技术制造市场中国发展过程

全面掌握核心技术提高研发设计能力为我国铁路现代化提供高品质机车装备

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中国铁路 2007年第11期 5-8页

作者：徐宗祥中国南车集团株洲电力机车有限公司总经理湖南株洲412001

实施和谐型机车项目,给铁路机车制造业带来了难得的发展机遇。中国南车集团株洲电力机车有限公司认真贯彻落实铁道部的总体部署,加快对引进技术的消化吸收再创新,技术转让全面完成,国产化工作进展顺利,质量管理稳步提升。依托和谐型机... 详细信息

实施和谐型机车项目,给铁路机车制造业带来了难得的发展机遇。中国南车集团株洲电力机车有限公司认真贯彻落实铁道部的总体部署,加快对引进技术的消化吸收再创新,技术转让全面完成,国产化工作进展顺利,质量管理稳步提升。依托和谐型机车项目,基本实现了搭建世界先进水平的交流传动机车技术平台,构建全新的科技创新工作体系,锤炼一支涵盖研发、制造和现场操作人员队伍的目标,迅速提升科技创新水平。和谐型机车国产化已经进入关键阶段,正集中优势资源,全力完成和谐型机车的批量生产任务和六轴机车的自主研制任务。

关键词：铁路现代化机车装备研发设计科技创新人才培养株洲电力机车有限公司

Insight into the Alkali Resistance Mechanism of CoMnHPMo Catalyst for NH_(3) Selective Catalytic Reduction of NO

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Transactions of Tianjin University 2024年第4期30卷 324-336页

作者： Kaixin Wang Yunchong Wang zongxiang Yang Xinyue Wang Caixia Liu Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China State Key Laboratory of Engines Tianjin UniversityTianjin 300350China

The existence of alkali metals in fl ue gases originating from stationary sources can result in catalyst deactivation in the low-temperature selective catalytic reduction(SCR)of nitrogen oxides(NO_(x)).It is widely accepted that alkali metal poisoning causes damage to the acidic sites of ***,in this study,a series of CoMn catalysts doped with heteropolyacids(HPAs)were prepared using the coprecipitation *** these,CoMnHPMo exhibited superior catalytic performance for SCR and over 95%NO_(x) conversion at 150-300􁕑.Moreover,it exhibited excellent catalytic activity and stability after alkali poisoning,demonstrating outstanding alkali metal *** characterization indicated that HPMo increased the specifi c surface area of the catalyst,which provided abundant adsorption sites for NO_(x) and NH_(3).Comparing catalysts before and after poisoning,CoMnHPMo enhanced its alkali metal resistance by sacrifi cing Brønsted acid sites to protect its Lewis acid *** situ DRIFTS was used to study the reaction pathways of the *** results showed that CoMnHPMo maintained high NH_(3) adsorption capacity after K poisoning and then reacted rapidly with NO intermediates to ensure that the active sites were not ***,SCR performance was ensured even after alkali metal *** sum-mary,this research proposed a simple method for the design of an alkali-resistant NH_(3)-SCR catalyst with high activity at low temperatures.

关键词： NH3-SCR Alkali resistance Phosphomolybdic acid CoMn

OPTIMUM DESIGN OF HIGH-SPEED RAILWAY LOCOMOTIVE TRACTION GEAR

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Chinese Journal of Mechanical Engineering 1996年第4期9卷 278-285页

作者： Li Lixing Wang Xiuqi He Weidong Zhao Wenzhong Qian Yuanmei (Dalian Railway Institute) Liu Youmei Gui Linfang Xiao Peng Pan Xiaoming xu zongxiang (Zhuzhou Electric Locomotive Works ) Dalian Railway Institute

On the basis of deep investigation of locomotive traction gears manufactured at home and abroad , a variety of measures are putted forward to improve the driving load-bearing capacity and working life of our country's high-speed locomotive traction gears. The measures include the fol- lowing five aspects : optimally selecting the material and heat treatment process , optimally designing the tooth profile . reasonably choosing the manufacture accuracy and technique , optimally choosing the lubricant and the way of lubrication and seal , improving the dynamic feature of the gearing. In the respect of the tooth profile , a hob with optimal cutter angles is designed to make root thickness on the dangerous section as large as possible and the stress concentration as small as possible. Ad- dendum modification coefficient is optimized to minimize the maximum flash temperature in the course of meshing. Finally . finite element analysis method is used to calculate the deformation and the stress of teeth accurately. And on this basis , optimal profile correction and axial modification have been designed with regard to the start , continuious running and high speed travel of the loco- motive .

关键词： High-speed gear Working life Load-bearing capacity Optimum design

Verification test on an innovated method for the studies on inheritance of resistance to rice sheath blight

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Chinese Rice Research Newsletter 2001年第3期9卷 5-6页

作者： ZHANG Yafang PAN xuebiao CHEN zongxiang Zou Junhuang xu Jinyou TONG Yunhui HAw Yuepeng WAWG Zibin Yangzhou Univ,Yangzhou 225009,China Yangzhou Univ Yangzhou 225009 China

We have recently developed a systematic method for the study on the inheritance of resistance to sheath blight. The key of the system is an innovated method of inoculation and investigation along with the employment o... 详细信息

关键词： test Verification test on an innovated method for the studies on inheritance of resistance to rice sheath blight

Influence of different inoculation methods on the evaluation of the resistance to rice sheath blight(Rhizoctonia solani Kuhn)

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Chinese Rice Research Newsletter 1998年第2期6卷 7-8页

作者： PAN xuebiao CHEN zongxiang xu Jingyou TONG Yunhui WANG Zibin PAN Xingyuan Dept of Agro of Agri Coll,Yangzhou Univ,Yangzhou 225009,China

To establish a standard system for geneticstudies on sheath blight resistance, a field testwas conducted at the experimental farm ofYangzhou University to compare several pro-cedures for inoculating rice plants with *** Kuhn (RH9). The varieties used wereJasmine 85, Teqing (resistant or moderatelyresistant), and Lemont (susceptible). They

关键词： Influence of different inoculation methods on the evaluation of the resistance to rice sheath blight Rhizoctonia solani Kuhn