检索结果-南通市图书馆

Beyond two-dimension: One-and zero-dimensional halide perovskites as new-generation passivators for high-performance perovskite solar cells

引用

能源化学:英文版 2023年第8期83卷 189-208,I0007页

作者： Yuanyuan Zhao Huimin Xiang Ran Ran Wei Zhou Wei Wang Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6845Australia

Perovskite solar cells(PSCs) as a rising star in the photovoltaic field have received rapidly increasing attention recently due to the boosting power conversion efficiencies(PCEs) from 3.8% to 25.7% in the last13 years. Nevertheless, the conventional PSCs with three-dimensional(3D) halide perovskites as light absorbers suffer from inferior PCEs and poor durability under sunlight, high-temperature and humid conditions due to the high defect amount and structural instability of 3D perovskites, respectively. To tackle these crucial issues, lower-dimensional halide perovskites including zero-dimensional(0D), onedimensional(1D), and two-dimensional(2D) perovskites have been employed as efficient passivators to boost the PCEs and durability of 3D-PSCs due to the high structural stability and superior resistance against moisture, heat and sunlight. Therefore, in order to achieve better understanding about the advantages and superiorities of combining low-dimensional perovskites with their 3D counterparts in improving the PCEs and durability of 3D-PSCs, the recent advances in the development and fabrication of mixeddimensional PSCs with 1D/0D perovskites as passivators are summarized and discussed in the review.The superiority of 1D/0D perovskites as passivators over 2D counterparts, the passivation mechanism and the methods of 1D/0D perovskites are also presented and discussed. Furthermore, the rules to choose1D/0D perovskites or relevant spacer cations are also emphasized. On this basis, several specific strategies to design and fabricate mixed-dimensional PSCs with 1D/0D perovskites are presented and discussed.Finally, the crucial challenges and future research directions of mixed-dimensional PSCs with 1D/0D perovskites as passivators are also proposed and discussed. This review will provide some useful insights for the future development of high-efficiency and durable mixed-dimensional PSCs.

关键词： Perovskite solar cells Mixed-dimensional Passivators Stability Power conversion efficiency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sodium fluoride sacrificing layer concept enables high-efficiency and stable methylammonium lead iodide perovskite solar cells

引用

Journal of Materials Science & Technology 2022年第18期113卷 138-146页

作者： Huimin Xiang Pengyun Liu Wei Wang Ran Ran Wei Zhou Zongping Shao College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009China WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia

As next-generation photovoltaic devices,methylammonium lead iodide(MAPbI_(3))-based organic-inorganic halide perovskite solar cells(PSCs)have received considerable attention because of their cost effectiveness and high efficiency.However,their practical applications are retarded due to severe instability under moisture,thermal and sunlight conditions,which are closely related to the insufficient perovskite film quality and high photocatalytic activity of defective TiO_(2) electron-transporting layer(ETL)to accelerate the perovskite decomposition.Herein,remarkably enhanced power conversion efficiency(PCE)and stability of MAPbI_(3)-based PSCs is reached through the use of a new sodium fluoride(NaF)sacrificing layer,which,introduced between the perovskite layer and ETL,is sacrificed during cell fabrication by penetrating into the perovskite layer,improving the perovskite film quality,while partial NaF is incorporated into the mesoporous TiO_(2) ETL during NaF layer fabrication to passivate TiO_(2) and construct a well-matched energy level alignment.As a result,the optimized PSC generates a high PCE of 20.9%,which is 17%higher than that of the pristine cell(17.9%),and outstanding performance stability due to remarkably enhanced moisture,thermal and sunlight stability.This study highlights a simple and effective approach to boost the PCE and durability of MAPbI 3-based PSCs simultaneously,accelerating the commercialization of this technology.

关键词： Perovskite solar cells Sodium fluoride sacrificing layer Defect passivation Stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

外来资本竞争如何影响地区生产率?——基于门槛效应的经验研究

引用

中央财经大学学报 2019年第3期 92-102页

作者：胡浩然南开大学经济学院

地方政府以GDP为主要评价的晋升机制依然存在,地区竞争特别是资本竞争是中国经济奇迹的重要推动力。在外资市场进一步开放的情况下,地区间的资本竞争对经济发展将产生什么影响?鉴于生产率可以反映地区间的经济发展差异,我们主要研究外... 详细信息

地方政府以GDP为主要评价的晋升机制依然存在,地区竞争特别是资本竞争是中国经济奇迹的重要推动力。在外资市场进一步开放的情况下,地区间的资本竞争对经济发展将产生什么影响?鉴于生产率可以反映地区间的经济发展差异,我们主要研究外来资本竞争对地区产业生产率的影响,并进一步剖析影响机制背后是否存在门槛效应。本文研究发现:(1)外来资本竞争可以显著地提高地区产业生产率,这与已有的研究和理论分析一致。(2)通过面板门槛模型实证检验发现,外来资本竞争对地区生产率的提升作用存在显著的门槛效应。在资本原始积累较低的地区,资本竞争对生产率的正向影响最大,随着资本禀赋丰富程度的提升,这一正向影响效应逐渐减弱并最终消失殆尽。我们认为,资本竞争与资本积累有很大关系,通过扭曲的政府竞争行为进而影响地区产业生产率。我们建议,地方政府的外资政策应当因地制宜,更应该认识到地方经济所处的发展阶段,避免盲目竞争而导致资本在地区间的资源错配。

关键词：资本竞争全要素生产率 DEA-Malmquist指数三门槛效应

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

语言好等于有了腿走路,作品好才等于有了脑子——专访米兰新美术学院设计系毕业生Miao ran

引用

留学 2015年第12期 72-73页

作者： Miao ran 《留学》

Q:为何选择就读NABA服装设计系?M:我曾经在国内读了两年产品设计,觉得学无所获,毅然决定退学。后来到了意大利,重新参加意大利学生的高考,进了米兰理工。在米兰理工读本科的阶段,Colomba Leddi是我的导师,我非常认可Colomba Leddi,待她... 详细信息

Q:为何选择就读NABA服装设计系?M:我曾经在国内读了两年产品设计,觉得学无所获,毅然决定退学。后来到了意大利,重新参加意大利学生的高考,进了米兰理工。在米兰理工读本科的阶段,Colomba Leddi是我的导师,我非常认可Colomba Leddi,待她到NABA任教后,我就去了NABA读了研究生。我一共读过四个大学,意大利公立的、私立的,还有一种不被认可的私立学校,都同时在读。

关键词： Miao ran 产品设计服装设计 Milano 服装史光鲜亮丽历史课国际认证全额奖学金

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New progress of small-molecule drugs in the treatment of inflammatory bowel disease

引用

Chinese Medical Journal 2024年第5期137卷 556-558页

作者： Dongying Yao Zhihua ran Department of Gastroenterology Zhou Pu Hospital affiliated to Shanghai University of Health&Medical SciencesShanghai 201318China

With the advent of small-molecule drugs,treatment of inflammatory bowel disease(IBD)has reached a new stage.In contrast to biologics,small-molecule drugs can be made into oral dosage forms with a short half-life and are suitable for administration 1–2 times a day.Small-molecule drugs work by inhibiting the transmission of key intracellular signaling pathways in the pathogenesis of ulcerative colitis(UC)and Crohn’s disease(CD)[Figure 1].They do not induce anti-drug antibodies in patients or lead to loss of response after treatment.

关键词： drugs treatment inflammatory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A phenomenological model of the fundamental power coupler for a superconducting resonator

引用

Nuclear Science and Techniques 2023年第5期34卷 33-46页

作者： ran Huang Yuan He Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

In this study,a phenomenological model of the radio frequency(RF)behavior of a superconducting cavity fundamental power coupler is proposed by analyzing the simulation results of a transient beam-loading process in an extremely overcoupled superconducting cavity.Using this phenomenological model,the calculation of the transient reflected power from a superconducting cavity under beam loading can be mathematically simplified to algebraic operations without solving the differential equation governing the transient beam-loading process,while maintaining the calculation accuracy.Moreover,this phenomenological model can facilitate an intuitive understanding of the significant surge in the time evolution of reflected power from a superconducting cavity in certain beam-loading processes.The validity of this phenomenological model was carefully examined in various beam-loading processes and cavity conditions,and the method based on this phenomenological model was utilized in the transient RF analysis of the superconducting cavity system of the CAFe Linac,achieving satisfactory results.

关键词： Power coupler Reflected power Superconducting cavity Beam loading

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A bilateral cyano molecule serving as an effective additive enables high-efficiency and stable perovskite solar cells

引用

Journal of Energy Chemistry 2021年第11期30卷 243-251,I0006页

作者： Pengyun Liu Huimin Xiang Wei Wang Ran Ran Wei Zhou Zongping Shao WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina

The existence of defects in perovskite films is a major obstacle that prevents perovskite solar cells (PSCs) from high efficiency and long-term stability. A variety of additives have been introduced into perovskite films for reducing the number of defects. Lewis base-based additive engineering has been considered as an effective way to eliminate defects, especially the defects caused by the uncoordinated Pb^(2+). In this work, for the first time, a bilateral cyano molecule (succinonitrile, SN) which is a commonly used plasticizer in solid electrolyte of solid-state lithium batteries was selected as an additive to modify organic–inorganic hybrid perovskite films in PSCs. SN is featured with two cyano groups (–C≡N) distributing at both terminals of the carbon chain, providing two cross-linking points to interact with perovskites crystals via coordinating with uncoordinated Pb2+ and forming hydrogen bonds with –NH2 groups in perovskite. It was found that the addition of SN into perovskite precursor solution could effectively reduce defects, particularly inhibit the appearance of Pb0 and thus suppress trap-assisted nonradiative charge carrier recombination. As a result, the efficiency of CH_(3)NH_(3)PbI_(3)(Cl) (MAPbI_(3)(Cl))-based PSCs was improved from 18.4% to 20._(3)% with enhanced long-term stability at N2 and humid air atmosphere. This work provides a facile and effective strategy to enhance the PCE and stability of PSCs simultaneously, facilitating the commercialization of PSCs.

关键词： Perovskite solar cells Succinonitrile additive Cyano groups Defect engineering Suppressed charge recombination

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Adaptive spatio-temporal attention neural network for cross-database micro-expression recognition

引用

Virtual Reality & Intelligent Hardware 2023年第2期5卷 142-156页

作者： Yuhan ran Key Laboratory of Child Development and Learning Science of Ministry of Education Research Center for Learning ScienceSoutheast UniversityNanjing 210096China School of Cyber Science and Engineering Southeast UniversityNanjing 210096China

Background The use of micro-expression recognition to recognize human emotions is one of the most critical challenges in human-computer interaction applications. In recent years, cross-database micro-expression recognition(CDMER) has emerged as a significant challenge in micro-expression recognition and analysis. Because the training and testing data in CDMER come from different micro-expression databases, CDMER is more challenging than conventional micro-expression recognition. Methods In this paper, an adaptive spatio-temporal attention neural network(ASTANN) using an attention mechanism is presented to address this challenge. To this end, the micro-expression databases SMIC and CASME II are first preprocessed using an optical flow approach,which extracts motion information among video frames that represent discriminative features of micro-expression.After preprocessing, a novel adaptive framework with a spatiotemporal attention module was designed to assign spatial and temporal weights to enhance the most discriminative features. The deep neural network then extracts the cross-domain feature, in which the second-order statistics of the sample features in the source domain are aligned with those in the target domain by minimizing the correlation alignment(CORAL) loss such that the source and target databases share similar distributions. Results To evaluate the performance of ASTANN, experiments were conducted based on the SMIC and CASME II databases under the standard experimental evaluation protocol of CDMER. The experimental results demonstrate that ASTANN outperformed other methods in relevant crossdatabase tasks. Conclusions Extensive experiments were conducted on benchmark tasks, and the results show that ASTANN has superior performance compared with other approaches. This demonstrates the superiority of our method in solving the CDMER problem.

关键词： Cross-database micro-expression recognition Deep learning Attention mechanism Domain adaption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-Entropy Perovskite Oxide: A New Opportunity for Developing Highly Active and Durable Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

引用

Nano-Micro Letters 2022年第12期14卷 505-520页

作者： Zuoqing Liu Zhengjie Tang Yufei Song Guangming Yang Wanru Qian Meiting Yang Yinlong Zhu Ran Ran Wei Wang Wei Zhou Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816People’s Republic of China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayHong Kong 999077People’s Republic of China Institute for Frontier Science Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia

Reversible proton ceramic electrochemical cell(R-PCEC)is regarded as the most promising energy conversion device,which can realize efficient mutual conversion of electrical and chemical energy and to solve the problem of large-scale energy storage.However,the development of robust electrodes with high catalytic activity is the main bottleneck for the commercialization of R-PCECs.Here,a novel type of high-entropy perovskite oxide consisting of six equimolar metals in the A-site,Pr_(1/6)La_(1/6)Nd_(1/6)Ba_(1/6)Sr_(1/6)Ca_(1/6)CoO_(3−δ)(PLN-BSCC),is reported as a high-performance bifunctional air electrode for R-PCEC.By harnessing the unique functionalities of multiple ele-ments,high-entropy perovskite oxide can be anticipated to accelerate reaction rates in both fuel cell and electrolysis modes.Especially,an R-PCEC utilizing the PLNBSCC air electrode achieves exceptional electrochemical performances,demonstrating a peak power density of 1.21 W cm^(−2)for the fuel cell,while simultaneously obtaining an astonishing current density of−1.95 A cm^(−2)at an electrolysis voltage of 1.3 V and a temperature of 600℃.The significantly enhanced electrochemical performance and durability of the PLNBSCC air electrode is attributed mainly to the high electrons/ions conductivity,fast hydration reactivity and high configurational entropy.This research explores to a new avenue to develop optimally active and stable air electrodes for R-PCECs.

关键词： Reversible proton ceramic electrochemical cells High-entropy oxide Air electrode Oxygen reduction reaction Oxygen evolution reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dilemma faced by photocatalytic overall water splitting

引用

Journal of Materials Science & Technology 2023年第26期157卷 107-109页

作者： Rongan He Jingrun ran Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA 5005Australia

Research on photocatalytic overall water splitting has attracted wide attention.Recently,a work has sys-tematically discussed the challenges for photocatalytic overall water splitting in terms of thermodynam-ics,kinetics,dissolved oxygen,and backward and side reactions.The critical analysis of the reaction pro-cess and reaction environment in the work contributes to an in-depth understanding of photocatalytic overall water splitting.

关键词： Thermodynamics Kinetics Backward reaction Dissolved oxygen Overall water splitting

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：