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Journal of Energy Chemistry 2024年第8期95卷 357-363,I0008页

作者： minghao xia Ziwei Zheng Yanjie Cheng Chaoyang Wang Zhaozhen Cui Guodong Zhang Jinwei Gonga Anyi Mei Hongwei Han Michael Grätzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsKey Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of EducationHuazhong University of Science and TechnologyWuhan 430074HubeiChina Key Laboratory of Flexible Electronics(KLoFE)&Institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech University(NanjingTech)Nanjing 211816JiangsuChina

The low-cost and easy large-scale fabrication advantages of printable mesoscopic perovskite solar cells(p-MPSCs)are overshadowed by their limited photovoltaic conversion efficiency(PCE).Here,we introduce the hydrazide derivative of 4-Hydroxybenzoylhydrazine(4-HBH)to improve the PCE of p-MPSCs by inducing enhanced defect *** carbonyl and hydrazine groups in hydrazide groups present strong interaction with *** hydroxyl group,as an electron donor group,increases the electron cloud density of the hydrazide group in 4-HBH under the conjugation of the benzene ring,and thus enhances its interaction with ***,the hydroxy group itself interacts with perovskite and passivates defects *** hydrazine agents can also reduce I2and suppress the loss of iodine in perovskite films,which inhibits the formation of iodine-related ***,p-MPSCs with 4-HBH achieve a high PCE of 19.21%,and present well improved stability.

关键词： Printable mesoscopic perovskite solar cells Multifunctional hydrazine derivatives Cooperative coordination Conjugation redox activity

Stabilizing perovskite precursors with the reductive natural amino acid for printable mesoscopic perovskite solar cells

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Journal of Energy Chemistry 2024年第3期90卷 32-39,I0003页

作者： Wenjing Hu Jian Yang Chuang Yang Xufeng xiao Chaoyang Wang Zhaozhen Cui Qiaojiao Gao Jianhang Qi minghao xia Yaqiong Su Anyi Mei Hongwei Han Michael Gratzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsKey Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Huazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry Xi'an Key Laboratory of Sustainable Energy Materials ChemistryState Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an 710049ShaanxiChina

Solution processability significantly advances the development of highly-efficient perovskite solar ***,the precursor solution tends to undergo irreversible degradation reactions,impairing the device performance and ***,we utilize a reductive natural amino acid,Nacetylcysteine(NALC),to stabilize the precursor solution for printable carbon-based hole-conductorfree mesoscopic perovskite solar *** find that I_(2) can be generated in the aged solution containing methylammonium iodide(MI) in an inert atmosphere and speed up the MA-FA^(+)(formamidinium) reaction which produces large-size cations and hinders the formation of perovskite *** effectively stabilizes the precursor via its sulfhydryl group which reduces I_(2) back to I^(-)and provides H^(+).The NALC-stabilized precursor which is aged for 1440 h leads to devices with a power conversion efficiency equivalent to 98% of that for devices prepared with the fresh ***,NALC improves the device power conversion efficiency from 16.16% to 18.41% along with enhanced stability under atmospheric conditions by modifying grain boundaries in perovskite films and reducing associated defects.

关键词： Perovskite solar cells Perovskite precursor Degradation Stabilization Reductive natural amino acid

Homogeneous permeation and oriented crystallization in nanostructured mesopores for efficient and stable printable mesoscopic perovskite solar cells

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Science China Chemistry 2024年

作者： Guodong Zhang Yanjie Cheng Tingting Niu Ziwei Zheng Zongwei Li Junwei xiang Qiaojiao Gao minghao xia Lijuan Guo Yiming Liu Mengru Zhang Yiran Tao Xueqin Ran Mingjie Li Guichuan Xing Yingdong xia Lingfeng Chao Anyi Mei Hongwei Han Yonghua Chen Key Laboratory of Flexible Electronics (KLoFE) and Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University Michael Gr?tzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for Optoelectronics Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Huazhong University of Science and Technology Department of Physics The Chinese University of Hong Kong Department of Applied Physics The Hong Kong Polytechnic University Shenzhen Research Institute The Hong Kong Polytechnic University Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau

The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the improvement of device power conversion efficiency(PCE). In particular, the most commonly used solvents, N,N-dimethylformamide(DMF) and dimethyl sulfoxide(DMSO), have a single chemical interaction with the precursor components and high volatility, which is insufficient to self-regulate the perovskite crystallization process, leading to explosive nucleation and limited growth within mesoporous scaffolds. Here, we report a mixed solvent system composed of methylamine formaldehyde(MAFa)-based ionic liquid and acetonitrile(ACN) with the strong C=O–Pb coordination and N–H···I hydrogen bonding with perovskite components. We found that the mixed solvent system is beneficial for the precursor solution to homogeneously penetrate into the mesoporous scaffold,and the strong C=O–Pb coordination and N–H···I hydrogen bonding interaction can promote the oriented growth of perovskite crystals. This synergistic effect increased the PCE of the p-MPSCs from 17.50% to 19.21%, which is one of the highest records for p-MPSC in recent years. Additionally, the devices exhibit positive environmental stability, retaining over 90% of the original PCE after 1,200 h of aging under AM 1.5 illumination conditions at 55 °C and 55% humidity.

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Resistance risk assessment of Puccinia striiformis *** to triadimefon in China

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Resistance risk assessment of Puccinia striiformis *** to tr...

基于Cuk变换器的无刷直流电机转矩脉动抑制仿真

中国植物病理学会2021年学术年会

作者： JI Fan LIU Yue ZHOU Aihong xia minghao ZHAO Jun ZHAN Gangming KANG Zhensheng College of plant protection Northwest A & F UniversityState Key Laboratory of Crop Stress Biology for Arid Areas

Wheat stripe rust,caused by Puccinia striiformis ***(Pst),is a destructive biological disaster on wheat and seriously threatens production safety in wheat producing areas which has been largely controlled using triadimefon in *** high levels of fungicide resistance in other pathogens have been reported,seldom field failure of Pst to any fungicides have been described and few fungicides sensitivity of Pst has been evaluated in *** resistance distribution and mechanism of Pst to triadimefon were investigated in the present study,providing important data for establishment of high throughput molecular detective methods,fungicide resistance risk management and the development of new target *** baseline sensitivity of 446 Pst isolates across the country to triadimefon was determined by detached leaf method,and the concentration for 50% of maximal effect(EC) distribution showed a unimodal curve,with mean value of 0.19 μg/*** results showed that the sensitivity range of Pst to triadimefon was wide,with more insensitive isolates collecting from winter-increasing area and northwest over-summering area and more sensitive isolates collecting from southwest over-summering area and two independent epidemic areas of Xinjiang and *** 6.79% of the tested Pst isolates had developed vary degrees of resistance to triadimefon,and most of isolates were sensitive to *** characterization of parasitic fitness,the triadimefon-resistant exhibited strong adaptive traits in urediniospore germination rate,latent period,sporulation intensity and lesion expansion *** cross-resistance was observed between triadimefon and tebuconazole or hexaconazole,but not between pyraclostrobin or *** point mutation Y134 F in 14 α-demethylase enzyme(Cyp51) was found in triadimefon-resistant *** a molecular detective method(Kompetitive Allele Specific PCR) was used for the rapid detection of the Y134 F point *** res

关键词： Puccinia striiformis f.sp.tritici wheat,stripe rust resistance risk

来源： cnki会议评论

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电子科技 2015年第7期28卷 70-73页

作者：石俊杨文焕夏天宇夏明豪上海理工大学光电信息与计算机工程学院上海200093

为解决无刷直流电机在换相过程中转矩脉动大的问题,提出了在三相逆变桥前端加入前级Cuk变换器和开关选择电路。通过对单一逆变器输入电压进行控制来抑制转矩脉动的方法。该方法使得瞬间换相区间电流上升相与电流下降相的电流斜率平衡,... 详细信息

为解决无刷直流电机在换相过程中转矩脉动大的问题,提出了在三相逆变桥前端加入前级Cuk变换器和开关选择电路。通过对单一逆变器输入电压进行控制来抑制转矩脉动的方法。该方法使得瞬间换相区间电流上升相与电流下降相的电流斜率平衡,从而有效减小了换相期间的转矩脉动。通过仿真验证了控制策略的有效性。

关键词：无刷直流电机转矩脉动抑制 Cuk电路 Matlab仿真

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反激式PFC开关电源的研究与设计

电子科技 2015年第6期28卷 133-135,140页

作者：夏明豪杨文焕夏天宇石俊上海理工大学光电信息与计算机工程学院上海200093

开关电源是实现电能转换和功率传递的重要设备。然而传统的开关电源功率因数低,谐波含量高,接入电网后,给电网带来了一系列严重的问题。文中设计了一款反激式PFC变换器的仿真模型,该模型是结合传统DC/DC变换中的反激式电路与基于Boost的... 详细信息

开关电源是实现电能转换和功率传递的重要设备。然而传统的开关电源功率因数低,谐波含量高,接入电网后,给电网带来了一系列严重的问题。文中设计了一款反激式PFC变换器的仿真模型,该模型是结合传统DC/DC变换中的反激式电路与基于Boost的PFC电路提出的,采用平均电流型控制作为本控制策略,最后运用Matlab仿真软件对模型进行了仿真,仿真结果表明该方案控制策略的正确性。

关键词：反激式电路功率因数 Matlab仿真开关电源

基于拉格朗日插值预测的STATCOM无差拍控制

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电子科技 2015年第12期28卷 29-31,35页

作者：夏天宇杨文焕石俊夏明豪上海理工大学光电信息与计算机工程学院上海200093

为解决在无功变化剧烈的电气环境中,基于PI控制的STATCOM要经过若干工频周期才能完成跟踪,无法补偿剧烈变化的无功电流的问题。在改进传统的无差拍控制离散数学模型,运用STATCOM状态方程的解,建立其离散数学模型,再提出一种基于拉格朗... 详细信息

为解决在无功变化剧烈的电气环境中,基于PI控制的STATCOM要经过若干工频周期才能完成跟踪,无法补偿剧烈变化的无功电流的问题。在改进传统的无差拍控制离散数学模型,运用STATCOM状态方程的解,建立其离散数学模型,再提出一种基于拉格朗日插值原理的电流预测方法,并进行控制系统的设计。仿真结果表明,基于前述原理的控制系统,能在一个工频周期内实现无功电流的跟踪,适应无功变化剧烈的电气环境。

关键词：无差拍控制拉格朗日插值电流预测 STATCOM SVPWM

小麦条锈菌对三唑酮敏感性生测体系优化及其抗药性分子标记开发

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植物病理学报 2023年第4期53卷 633-641页

作者：夏铭浩周爱红纪凡赵鋆康振生詹刚明西北农林科技大学植物保护学院旱区作物逆境生物学国家重点实验室杨凌712100

条锈病是小麦上重要的真菌病害,严重威胁小麦的生产安全,施用杀菌剂是防治小麦条锈病的重要措施。三唑酮是防治条锈病的主要药剂,但长期单一、大规模使用三唑酮势必导致病原菌抗药性出现,由于小麦条锈菌是严格的专性寄生菌,目前测定条... 详细信息

条锈病是小麦上重要的真菌病害,严重威胁小麦的生产安全,施用杀菌剂是防治小麦条锈病的重要措施。三唑酮是防治条锈病的主要药剂,但长期单一、大规模使用三唑酮势必导致病原菌抗药性出现,由于小麦条锈菌是严格的专性寄生菌,目前测定条锈菌对杀菌剂的敏感性实验主要在活体小麦上进行,实验结果易受外界环境影响。本研究通过培养皿内离体小麦叶段培养,采取定量接种和软件读数的方法,对2021年西北核心越夏区60个小麦条锈菌菌株进行三唑酮敏感性测定,生测结果表明供试菌株平均EC50值为0.543μg·mL^(-1),抗性菌株7株,敏感菌株53株,11.67%的供试菌株对三唑酮具有低至中等水平抗性,分子标记结果与生测结果高度吻合。本研究通过优化三唑酮对条锈病防治效果的室内生测体系,使得结果更加稳定、重复性好,同时基于敏感/抗药菌株靶标基因序列分析开发了高通量的抗药性竞争性等位基因特异性PCR-单核苷酸多态性分子标记(KASP-SNP),旨在为防治小麦条锈病筛选高效杀菌剂,同时开展田间小麦条锈菌抗药性监测,了解抗药性分布及抗性水平,为小麦条锈菌抗药性综合治理提供科学依据。

关键词：小麦条锈菌三唑酮生测体系 KASP-SNP分子标记

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新型正反馈主动频率偏移法孤岛检测研究

电子科技 2017年第8期30卷 67-69,172页

作者：张海峰夏明豪李晓龙国网浙江省电力公司检修分公司浙江杭州311232

当电网发生故障或检修停电时,逆变器要求能够准确及时地检测出孤岛效应,迅速地将自身切离电网,尽量减少逆变器对电网产生的不良影响。针对传统的主动频率偏移法,在逆变器的孤岛检测中存在的容性负载难以检测、有功电流波动、存在较大检... 详细信息

当电网发生故障或检修停电时,逆变器要求能够准确及时地检测出孤岛效应,迅速地将自身切离电网,尽量减少逆变器对电网产生的不良影响。针对传统的主动频率偏移法,在逆变器的孤岛检测中存在的容性负载难以检测、有功电流波动、存在较大检测盲区等不足,文中提出了正反馈主动频率偏移法(AFDPF),该法从正反两方向进行频率的扰动,有效解决了容性负载检测失效、有功电流波动等问题。在Matlab/Simulink仿真环境下建立仿真模型并仿真,仿真结果验证了AFDPF算法设计的正确性。

关键词：并网逆变器孤岛检测 Matlab仿真 AFDPF

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三相电压锁相环模块化自动代码生成

电子科技 2015年第7期28卷 31-33页

作者：吴帅杨文焕陈斌夏明豪上海理工大学光电信息与计算机工程学院上海200093

提出一种新的基于Xilinx FPGA开发工具SG的三相电网锁相环实现方法,此方法不仅避免了复杂程序代码的编写,而且方便在Simulink环境下进行仿真调试。根据三相电网锁相环PLL的原理,建立SG模型仿真并自动生成HDL代码,导入到ISE工程中综合下... 详细信息

提出一种新的基于Xilinx FPGA开发工具SG的三相电网锁相环实现方法,此方法不仅避免了复杂程序代码的编写,而且方便在Simulink环境下进行仿真调试。根据三相电网锁相环PLL的原理,建立SG模型仿真并自动生成HDL代码,导入到ISE工程中综合下载到FPGA控制板进行硬件验证,试验结果验证了文中提出的锁相方法的正确性和良好的动态性能。展示了模块化自动代码生成方法的可行性。

关键词：现场可编程门阵列自动代码生成三相电网锁相环系统生成