检索结果-南通市图书馆

在线全文

cnki会议

学校读者我要写书评

暂无评论

非铅金属卤化物类钙钛矿发光材料研究进展

发光学报 2023年第8期44卷 1344-1368页

作者：韩冰庆轶朝周志明谭占鳌北京化工大学北京软物质科学与工程高精尖创新中心北京100029

铅基卤化物钙钛矿发光材料因具有荧光量子产率高、发射光谱窄、发射波长可调等优异性能优势而备受关注。但金属铅的毒性和钙钛矿的稳定性是其未来在显示与照明领域实际应用中需要解决的问题。因此,探索与铅基卤化物钙钛矿光电性质相当... 详细信息

铅基卤化物钙钛矿发光材料因具有荧光量子产率高、发射光谱窄、发射波长可调等优异性能优势而备受关注。但金属铅的毒性和钙钛矿的稳定性是其未来在显示与照明领域实际应用中需要解决的问题。因此,探索与铅基卤化物钙钛矿光电性质相当、但更绿色环保的非铅金属卤化物类钙钛矿发光材料是势在必行的趋势。近年来,非铅金属卤化物类钙钛矿发光材料的研究取得了显著进展。本文总结了非铅金属卤化物类钙钛矿材料的晶体结构、制备方法和发光机理。归纳了影响非铅金属卤化物类钙钛矿光电性能的因素,并列举了在光致和电致发光器件领域的应用。最后,就如何进一步提升非铅金属卤化物钙钛矿发光材料的性能做了总结和展望。

关键词：金属卤化物类钙钛矿材料发光材料电致发光器件光致发光器件

Water-Induced Synthesis of Molybdenum Oxide for Solution-Processed Hole Transport Layer in Polymer Solar cells

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Water-Induced Synthesis of Molybdenum Oxide for Solution-Pro...

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Yongshuai Gong Huaizhi Gao Zongwen Ma Xueqi Wei Hongfei Shi zhanao tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical Technology

MoO as a potential hole transport layer(HTL) in polymer solar cells is usually deposited on the active layer by thermal evaporation in inverted devices,while solution processed MoO(s-MoO) is used in conventional device,the thicknesses in both conditions are limited around 10 nm,which is definitely not suitable for large area module. In this study,we introduce very little amount of water during the synthesis of molybdenum oxide,and the color of precursor solution changes to dark blue after a few hours *** fabricate devices with configuration of ITO/s-MoO/PBDB-T:ITIC/Ca/Al,s-MoO is deposited by spinning coating of the precursor solution and annealing at 150℃ for 15 min in *** concentration of precursor solution is around 20 mg/mL,which indicate the s-MoO is much thicker than most reported *** device demonstrates a power conversion efficiency(PCE) of 8.33 % when the amount of water is 0.3% in precursor solution,which is comparable with PEDOT:PSS as *** the annealing procedure is completed in glove fulfill with nitrogen,the precursor solution should be diluted to around 2 mg/mL before use,100 ℃ for 30 min is enough for a PCE of 7.98 %.

关键词： polymer solar cell molybdenum oxide hole transport layer

Improving Charge Transport and Reducing Non-radiative Energy Loss via a Nonacyclic Carbazole-Based Third Component for Over 18% Efficiency Polymer Solar Cells

在线全文

cnki会议

学校读者我要写书评

暂无评论

Improving Charge Transport and Reducing Non-radiative Energy...

第九届新型太阳能材料科学与技术学术研讨会

作者： Yongshuai Gong Shihao Sha Tinglei Zhao Chengyang Zhang Zhiming Zhou zhanao tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

Sensible selection of host blends and the third component is crucial to give full play to the advantages of the ternary strategy for achieving high efficiency polymer solar cells(PSCs). In this work, PM6:BTP-BO-4 Cl binary system and non-fullerene acceptor DTTC-4 ClC9 with dithienocyclopentacarbazole(DTC) core are selected as the host blend and the third component, respectively. DTTC-4 ClC9 and BTP-BO-4 Cl are found to have excellent miscibility, the addition of DTTC-4 ClC9 into the binary blend can modify the morphology of the film, which brings out an improved charge transport and obviously enhanced exciton dissociation ability. The non-radiative energy loss of the devices is significantly reduced to 0.207 eV when employing the ternary strategy, thus leading a reduction in energy loss. As the result, the introduction of 15% DTTC-4 ClC9 in the PM6:BTP-BO-4 Cl system can promote power conversion efficiency from 17.11% to a remarkable 18.21%, meanwhile, the open-circuit voltage, short-circuit current density, and fill factor are increased simultaneously.

关键词： Ternary polymer solar cells DTTC-4ClC9 modified surface morphology non-radiative energy loss

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于碳量子点的光电器件应用新进展

物理化学学报 2018年第11期34卷 1250-1263页

作者：贺平袁方龙王子飞谭占鳌范楼珍北京师范大学化学学院北京100875 北京软物质科学与工程高精尖创新研究中心北京化工大学北京100029

碳量子点(CQDs)作为一种新型荧光碳纳米材料,由于其较高的电子迁移率、较长的热电子寿命、极快的电子取出速度,可调的带隙宽度、较强的稳态荧光等独特的光电性质和可溶液加工、成本低廉的特点,使得CQDs在光电器件领域具有广阔的应用前景... 详细信息

碳量子点(CQDs)作为一种新型荧光碳纳米材料,由于其较高的电子迁移率、较长的热电子寿命、极快的电子取出速度,可调的带隙宽度、较强的稳态荧光等独特的光电性质和可溶液加工、成本低廉的特点,使得CQDs在光电器件领域具有广阔的应用前景,近年来受到人们的广泛关注,重要的研究成果不断涌现。本文首先简要介绍了CQDs的合成方法、化学结构及其光电性质,然后总结了CQDs在发光二极管(LEDs)、太阳能电池(SCs)和光电探测器(PDs)等光电器件领域的研究进展,最后对CQDs的发展方向进行了展望。

关键词：碳量子点合成方法光电性质发光二极管太阳能电池光电探测器

Revival of Insulating Polyethylenimine by Creatively Carbonizing with Perylene into Highly Crystallized Carbon Dots as the Cathode Interlayer for High-Performance Organic Solar Cells

在线全文

学校读者我要写书评

暂无评论

Revival of Insulating Polyethylenimine by Creatively Carboni...

第九届新型太阳能材料科学与技术学术研讨会

作者： Yiman Dong Yizhao Qing Rui Shi Gangfeng Su Huanyu Ma Qi Dang zhanao tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

The development of new electron transporting layer(ETL) materials to improve the charge carrier extraction and collection ability between cathode and the active layer has been demonstrated to be an effective approach to enhance the photovoltaic performance of organic solar cells(OSCs). Herein, water-soluble carbon dots(CDs) as ETL material have been creatively synthesized by a vigorous chemical reaction between polyethylenimine(PEI) and 3,4,9,10-perylenetetracarboxylic dianhydride(PTCDA) via a simple one-step hydrothermal method. Taking full advantage of the high electron transfer property of PTCDA and the work function(WF) reduction ability of PEI, CD gained high electron mobility due to its large π-conjugated area and reduced the WF of indium tin oxide(ITO) by 0.75 e V. As for the photovoltaic performance of devices, inverted OSCs based on CDs have achieved a high power conversion efficiency(PCE) of 17.35%, exhibiting no burn-in effect with no reduction in PCE after more than 4000 h of storage. The successful application of CDs in OPV has developed a new avenue for designing efficient ETL materials that benefits the photovoltaic performance of OSCs.

关键词： carbon dot cathode interlayer electron transporting layer interface engineering inverted organic solar cell

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于截面重构的液流电池内部多组分输运强化

工程热物理学报 2023年第4期44卷 1041-1049页

作者：肖国震杨国安谭占鳌褚凤鸣北京化工大学机电工程学院北京100029 北京化工大学北京软物质科学与工程高精尖创新中心北京100029

有机液流电池以其低廉的价格和优异的电化学性能受到广泛关注。本文以醌-铁有机液流电池体系为研究对象,建立了多孔电极内部多组分输运模型,并搭建实验台验证了其可靠性。基于传统的蛇形流道,本文研究了流道截面形状对多孔电极内部多组... 详细信息

有机液流电池以其低廉的价格和优异的电化学性能受到广泛关注。本文以醌-铁有机液流电池体系为研究对象,建立了多孔电极内部多组分输运模型,并搭建实验台验证了其可靠性。基于传统的蛇形流道,本文研究了流道截面形状对多孔电极内部多组分输运过程和电池性能的影响机理。结果表明,与传统矩形截面流道相比,在相同操作条件下半圆形的截面流道消耗更低的充电电压并且具有更高的放电电压。相较传统矩形截面流道,具有半圆形截面流道的电极均匀性因子最多提高了7.4%。且在电极四分之三切面处,半圆形截面流道电极的反应物浓度比传统电极高10.8%,大幅增强了活性离子的输运。半圆形的流道截面的提出,有利于基于有机液流电池大规模储能技术的发展。

关键词：有机液流电池流道截面多组分输运雷诺数充放电

Crosslinkable and chelatable organic ligand enables interfaces and grains collaborative passivation for efficient and stable perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Crosslinkable and chelatable organic ligand enables interfac...

第九届新型太阳能材料科学与技术学术研讨会

作者： Zongwen Ma Huaizhi Gao Zhiyang Xu Ruyue Wang Zhangwei He Guangzheng Wu Mengyun Zheng zhanao tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

Organic-inorganic halide perovskite solar cell(PerSC) stands for the state-of-the-art emerging photovoltaic technologies. However, the environmental water/moisture and temperature induced intrinsic degradation and phase transition of perovskite greatly retard the commercialization process. Herein, a dual-functional organic ligand, 4,7-bis((4-vinylbenzyl)oxy)-1,10-phenanthroline(namely, C1), with the crosslinkable styrene sidechains and chelatable phenanthroline backbone, synthesized via a cost-effective Williamson reaction, is introduced for collaborative electrode interface and perovskite grain boundaries(GBs) engineering. C1 can chemically chelate with Sn in SnO electron transport layer and Pb in perovskite layer via coordination bonds, suppressing nonradiative recombination caused by traps/defects existing at the interface and GBs. Meanwhile, C1 enables in-situ crosslinking via thermal-initiated polymerization to form a hydrophobic and stable polymer network, freezing perovskite morphology and resisting moisture degradation. Consequently, through collaborative interface-grain engineering, the resulting PerSCs demonstrate high power conversion efficiency(PCE) of 24.31% with excellent water/moisture and thermal stability.

关键词： chemical anchoring in-situ crosslinking collaborative interface-grain engineering perovskite solar cell stability

光交联型窄带隙共聚物的合成及其对本体异质结聚合物太阳电池稳定性的影响

在线全文

cnki会议

学校读者我要写书评

暂无评论

中国科技论文 2014年第2期9卷 212-217页

作者：王福芝侯旭亮谭占鳌华北电力大学新能源电力系统国家重点实验室北京102206 华北电力大学能源安全与清洁利用北京市重点实验室北京102206

本体异质结聚合物太阳电池的活性层通常是由聚合物给体和富勒烯受体通过机械混合而成,活性层的聚合物和富勒烯分子从热力学角度倾向于各自聚集,由此形成的纳米微相分离结构是热不稳定的,造成电池稳定性较差。为了提高活性层薄膜形貌稳定... 详细信息

本体异质结聚合物太阳电池的活性层通常是由聚合物给体和富勒烯受体通过机械混合而成,活性层的聚合物和富勒烯分子从热力学角度倾向于各自聚集,由此形成的纳米微相分离结构是热不稳定的,造成电池稳定性较差。为了提高活性层薄膜形貌稳定性,本文设计并合成出新型的溴基团取代的光交联型窄带隙聚合物PBDTTT-Br25和PBDTTT-Br50。经光引发交联后的聚合物薄膜表现出良好的抗溶剂性和形貌稳定性,且不影响聚合物分子排列及载流子传输性能。通过研究热退火对共混膜形貌的影响,发现使用光交联材料可以有效抑制富勒烯分子聚集,并提高聚合物太阳电池的热稳定性。基于PBDTTT-Br25和PBDTTT-Br50的器件光电转换效率分别为5.17%和4.48%,相比于基于聚合物PBDTTT的器件效率(4.26%),性能得到明显的提高。

关键词：太阳能电池共聚物形貌共轭聚合物稳定性光物理

在线全文

学校读者我要写书评

暂无评论

串联型颈动脉狭窄的血流动力学模拟分析

介入放射学杂志 2024年第2期33卷 150-155页

作者：曹俊杰姚志超霍桂军刘占鳌汤尧黄剑周大勇沈利明南京医科大学姑苏学院苏州市立医院南京医科大学附属苏州医院血管外科江苏南京215000

目的使用计算流体力学(computational fluid dynamic,CFD)对串联型颈动脉狭窄(tandem carotid artery stenosis,TCAS)进行模拟,比较不同手术方式术后的血流动力学改变情况。方法选取1例颈内动脉(internal carotid artery,ICA)和颈总动脉(common carotid artery,CCA)串联型狭窄患者,使用CFD技术对建立的4个颈动脉分叉三维模型(1个真实患者模型,3个假定手术模型)进行血流动力学分析,探索TCAS的发生发展机制并指导选择合适的手术方案。结果在串联型狭窄中,狭窄优先在CCA形成,随后导致ICA狭窄;TCAS较单个颈动脉狭窄的局部血流动力学情况更复杂,风险更高;串联型狭窄中,单个狭窄部位的治疗会影响第二个狭窄部位的血流,并可能导致再狭窄或斑块破裂。结论在规划TCAS手术方案时,对选定TCAS患者进行CFD模拟可帮助临床医生评估术后血流改变情况,指导选择合适的手术方案。

关键词：颈动脉狭窄串联病变血流动力学计算流体力学