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Propeller-shaped NI isomers of cathode interfacial material for efficient organic solar cells

Nano Research 2024年第3期17卷 1564-1570页

作者： Hao Liu Jilei Jiang shuixing dai Liangmin Yu Xu Zhang Xianbiao Hou Ke Gao Heqing Jiang Minghua Huang School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and TechnologyQingdao 266100China Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China

Cathode interfacial materials(CIMs)stand as critical elemental in organic solar cells(OSCs),which can align energy levels,and foster ohmic contacts between the cathode and active layer of the OSCs.Nevertheless,the lagging advancement in CIMs has concurrently engendered the oversight of theoretical inquiries pertaining to the impact of molecular structure on their performance.Delving into this realm,we present two propeller-shaped isomers,4,4',4''-(benzo[1,2-b:3,4-b':5,6-b'']trithiophene-2,5,8-triyl)tris(2-(3-(dimethylamino)propyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione)(3ONIN)and 6,6',6''-(benzo[1,2-b:3,4-b':5,6-b'']trithiophene-2,5,8-triyl)tris(2-(3-(dimethylamino)propyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione)(3PNIN),distinguished by their molecular planarity,as a promising foundation for crafting highly efficient OSCs.This study illuminates the superiority of 3PNIN with more plane structure,exemplified by its enhanced molar extinction coefficient,deeper lowest unoccupied molecular orbital(LUMO)and highest occupied molecular orbital(HOMO)energy levels,intensified self-doping effect,heightened electron mobility,and elevated conductivity,in comparison to its counterpart,3ONIN.As a result,3PNIN and 3ONIN-treated OSC devices yield efficiencies of 17.73%and 16.82%,respectively.This finding serves as a compelling validation of the critical role played by molecular planarity in influencing CIM performance.

关键词： propeller-shaped molecules naphthalimide(NI)isomers cathode interfacial materials organic solar cells

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Engineering adjacent Fe_(3)C as proton-feeding centers to single Fe sites enabling boosted oxygen reduction reaction kinetics for robust Zn-air batteries at high current densities

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Nano Research 2023年第7期16卷 9371-9378页

作者： Canhui Zhang Xingkun Wang Kai Song Kaiyue Chen shuixing dai Huanlei Wang Minghua Huang School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Oxygen reduction reaction(ORR)plays an important role in the next-generation energy storage technologies,whereas it involves the sluggish and complicated proton-coupled electron transfer(PCET)steps that greatly limit the ORR kinetics.Therefore,it is urgent to construct an efficient catalyst that could simultaneously achieve the rapid oxygen-containing intermediates conversion and fast PCET process but remain challenging.Herein,the adjacent Fe_(3)C nanoparticles coupling with single Fe sites on the bubble-wrap-like porous N-doped carbon(Fe_(3)C@FeSA-NC)were deliberately constructed.Theoretical investigations reveal that the adjacent Fe_(3)C nanoparticles speed up the water dissociation and serve as proton-feeding centers for boosting the ORR kinetics of single Fe sites.Benefiting from the synergistic effect of the Fe_(3)C and single Fe sites,the Fe_(3)C@FeSA-NC affords an excellent half-wave potential of 0.88 V,and enables the assembled Zn-air batteries with the high peak power density of 164.5 mW·cm^(-2)and long-term stability of over 200 h at high current densities at 50 mA·cm^(-2).This work clarifies the mechanism for improving ORR kinetics of single atomic sites by engineering the adjacent proton-feeding centers,shedding light on the rational design of cost-effective electrocatalysts for energy conversion and storage technologies.

关键词： oxygen reduction reaction discharge stability water dissociation proton-coupled electron transfer

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The impact of fluorination on both donor polymer and non-fullerene acceptor:The more fluorine,the merrier

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Nano Research 2019年第9期12卷 2400-2405页

作者： Nicole Bauer Qianqian Zhang Jeromy James Rech shuixing dai Zhengxing Peng Harald Ade Jiayu Wang Xiaowei Zhan Wei You Department of Chemistry University of North Carolina at Chapel HillNorth Carolina 27599USA Department of Materials Science and Engineering College of EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry EducationPeking UniversityBeijing 100871China Department of Physics and ORaCEL North Carolina State UniversityRaleighNorth Carolina 27695USA

Fluorination of the donor polymer or non-fullerene acceptor (NFA) in an organic photovoltaic device is an effective method to improve device efficiency.Although there have been many studies on donor polymer fluorination,blends containing both a fluorinated donor and fluorinated NFA have rarely been reported.In this study,we use two donor polymers (4'-FT-HTAZ and 4'-FT-FTAZ) and two NFAs (ITIC-Th and ITIC-Th1) with different amounts of fluorine (from 2F to 6F) to investigate how the degree of fluorination in a blend impacts device performance.We find that fluorinating the NFA leads to a higher short-circuit current density (Jsc) and fill factor (FF),however,the open-circuit voltage (Voc) is decreased due to a depressed lowest unoccupied molecular orbital (LUMO) level.Adding additional fluorine to the donor polymer does not have a large effect on the Jsc or FF,but it does lead to an improved Voc.By fluorinating the NFA and having more fluorine on the donor polymer,we obtain both a high Jsc and Voc simultaneously,leading to a power conversion efficiency over 10% in the case of 4'-FT-FTAZ:ITIC-Th1,which has the most amount of fluorine (6F).

关键词： organic solar cells non-fullerene acceptors fluorination bulk heterojunction

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Modulating morphology via side-chain engineering of fused ring electron acceptors for high performance organic solar cells

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Science China Chemistry 2019年第6期62卷 790-796页

作者： Fuwen Zhao Dan He Jingming Xin shuixing dai Han Xue Li Jiang Zhixiang Wei Wei Ma Xiaowei Zhan Yongfang Li Chunru Wang Institute of Chemistry Chinese Academy of Sciences State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Department of Materials Science and Engineering College of Engineering Peking University National Center for Nanoscience and Technology

In this work, four fused ring electron acceptors(FREAs), 2F-C5, 2F-C6, 2F-C8 and 2F-C10, are developed to investigate the effect of side-chain size on the molecular properties and photovoltaic performance of FREA systematically. The elongation of side-chains in the FREAs not only improves their solubility in the processing solvent, but also enhances their miscibility with the donor PBDB-T. It helps the FREA diffuse into the donor PBDB-T during film-formation, thus leading to the decrease in domain size and domain purity from PBDB-T:2F-C5 to PBDB-T:2F-C10 blend films in sequence. The smaller domain size affords more D/A interfaces to benefit exciton dissociation and inhibit monomolecular recombination. However, severe bimolecular recombination occurs when the domain purity decreases to a critical point. Due to the dual function of the increment of side-chain length, both short-circuit current density(J_(SC)) and fill factor(FF) of devices exhibit an evolution of first increasing then decreasing from 2F-C5, 2F-C6, 2F-C8 to 2F-C10 based OSCs. The PBDB-T:2F-C8 based OSCs get a fine balance in morphology with moderate domain size as well as high domain purity simultaneously for the least charge carrier recombination, thus achieving the highest power conversion efficiency of 12.28% with the best J_(SC)(21.27 mA cm^(-2)) and FF(71.96%).

关键词： solar cells fused ring electron acceptor side-chain length morphology

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螺杆发电技术在热电厂高除加热蒸汽系统的应用

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上海节能 2024年第3期 475-482页

作者：朱水兴汪书华戴林祥金飞靳刚王文杰杭州临江环保热电有限公司

由于工艺需要,热电厂生产环节中存在着各种各样的节流、减压装置,如减温减压器、减压阀、调节阀。因系统设计、压力匹配方面的原因,上述设备在完成各自功能的前提下,或多或少存在着做功能力损失即“?损”,看似无形,却实实在在消耗了可... 详细信息

由于工艺需要,热电厂生产环节中存在着各种各样的节流、减压装置,如减温减压器、减压阀、调节阀。因系统设计、压力匹配方面的原因,上述设备在完成各自功能的前提下,或多或少存在着做功能力损失即“?损”,看似无形,却实实在在消耗了可用能。如何把无形的节流减压损失转化为有形的电能输出,在完成基本功能的同时回收利用部分“?损”,实现能源梯级利用,是工程技术领域值得探究的重大课题。通过螺杆膨胀机发电技术在热电厂高压除氧器进汽系统的优化设计和应用示范,推广了一种节能新技术和新理念。

关键词：螺杆膨胀机余压余热发电蒸汽系统除氧器

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High-performance organic solar cells based on polymer donor/small molecule donor/nonfullerene acceptor ternary blends

High-performance organic solar cells based on polymer donor/...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： dai shuixing Lu Bing Zhan Xiaowei College of Engineering Peking University

We first reported the small molecule donor/polymer donor/nonfullerene acceptor ternary OSCs, which achieved a power conversion efficiency over 13%. The results showed that(1) TR is totally mixed with PTB7-Th and efficient energy transfer to PTB7-Th,(2) TR enhanced the charge mobility of PTB7-Th blend,(3) Transient absorption spectroscopy confirms the importance of long-range resonant energy transfer from PTB7-Th to FOIC.

关键词： ternary blend non-fullerene small molecular donor organic solar cells

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新时代民族院校研究生思政课亲和力提升途径

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山西高等学校社会科学学报 2020年第9期32卷 25-29页

作者：张涛华代水星中南民族大学马克思主义学院湖北武汉430074

提升民族院校研究生思政课亲和力,是新时代民族院校落实立德树人根本任务、保障研究生思政课程因时而进、满足各民族研究生发展需求和期待、推进研究生思政课教师队伍建设的现实需要。民族院校研究生思政课建设取得了一定的成效,但随着... 详细信息

提升民族院校研究生思政课亲和力,是新时代民族院校落实立德树人根本任务、保障研究生思政课程因时而进、满足各民族研究生发展需求和期待、推进研究生思政课教师队伍建设的现实需要。民族院校研究生思政课建设取得了一定的成效,但随着时代发展仍存在着一些不足,特别突出的是内容特色不够明显,教学手段比较单一,教学互动不够充分。提升民族院校研究生思政课亲和力,就要不断深入开展研究生思政课教学改革,新时代需要研究生思政课“有趣”更“有用”,“有料”更“有效”,“有人”更“有情”,“有益”更“有力”。

关键词：民族院校研究生思想政治理论课亲和力立德树人

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