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Delicate chemical structure regulation of nonfullerene acceptor for efficient and large thickness organic solar cells

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Science China Chemistry 2024年第5期67卷 1596-1604页

作者： Zhe Zhang Wanying Feng Yunxin Zhang Shaohui Yuan Yuyang Bai Peiran Wang Zhaoyang Yao Chenxi Li tainan Duan Xiangjian Wan Bin Kan Yongsheng Chen State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic MatterThe Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China Chongqing Institute of Green and Intelligent Technology Chongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400722China

Inspired by the success of CH-series acceptors, a small-molecular acceptor, CH-Tz was reported by adopting a new conjugationextended electron-deficient unit([1,2,5]thiadiazolo[3,4-b]pyrazine) on the central core. Owing to the enhanced inter-/intramolecular interactions, CH-Tz exhibited near-infrared absorption and an effective three-dimensional molecular packing network in its single crystal. When blended with polymer donor PM6, the binary device achieved a high power conversion efficiency(PCE) of 18.54%, with a notable short-circuit current density(J_(sc)) of 27.54 m A cm-2and an excellent fill factor(FF) over 80%,which can be partly ascribed to the balanced charge transport properties in the blend film. After employing D18-Cl as the third component, an enhanced PCE of 18.85% was achieved due to a more obvious fiber network. Impressively, the CH-Tz-based OSC devices show excellent thermal stability and thickness insensitivity. Record-breaking Jscof 28.92 m A cm-2was reached for PM6:D18-Cl:CH-Tz ternary device with a thickness of 560 nm. Besides, CH-Tz shows potential in fabricating multicomponent high-performance organic solar cells, where over 19% efficiency could be realized in the quaternary device. Our work advances the strong influence of electron-deficient central units on molecular photovoltaic properties and guides the design of acceptors for stable and large-thickness organic solar cells.

关键词： organic solar cells non-fullerene acceptor central unit large thickness molecular packing

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A case study of comparing two dimerized acceptor molecules built by different branch-connected and terminal-connected approaches

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Science China Chemistry 2024年第5期67卷 1687-1696页

作者： Kangqiao Ma Huazhe Liang Yuxin Wang Tengfei He tainan Duan Xiaodong Si Wendi Shi Guankui Long Xiangjian Cao Zhaoyang Yao Xiangjian Wan Chenxi Li Bin Kan Yongsheng Chen State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic MatterThe Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsInstitute of Polymer ChemistryRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering National Institute for Advanced MaterialsRenewable Energy Conversion and Storage Center(RECAST)Nankai UniversityTianjin 300350China Chongqing Institute of Green and Intelligent Technology Chongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400015China

Dimerized small-molecule acceptors(SMAs) built by the conventional connection of terminal groups of monomers have contributed to exciting long-term stabilities of organic solar cells(OSCs). However, device efficiencies, especially fill factors(FFs), still need to be improved. This probably originates from unsymmetrical molecular structure/conformation-determined less compact/ordered molecular stackings, such as ineffective stackings of constraint terminals. Herein, an exotic dimerized SMA of BC-Th is established by bridging the branched groups(BC-type, branch coupling) of two monomers rather than conventional terminal units(TC-type, terminal coupling). Benefiting from the three-dimensional conformation and more uncurbed terminals,BC-Th exhibits multiple molecular orientations along with a larger dielectric constant and electron mobility compared with TCTh. Finally, an efficiency of 17.43% is achieved by BC-Th-based OSCs, along with the highest FF of 79.13% among all dimerized SMAs-based OSCs to date. When introducing L8-BO as the third component, overall enhanced efficiency of 18.05%and FF of 80.11% are further afforded. Contrarily, TC-Th-based OSCs exhibit much inferior PCE of 16.29% and FF of 74.81%,demonstrating the great advantages of “branch coupling” over “terminal coupling” when building dimerized SMAs.

关键词： organic solar cells dimerized acceptor molecules branch coupling morphology control stability

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添加剂在有机太阳能电池中的应用

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化学学报 2024年第5期82卷 551-564页

作者：江雪涂开槐段泰男肖泽云重庆交通大学国科大重庆学院重庆400074 中国科学院重庆绿色智能技术研究院重庆400714

有机太阳能电池(OSC)的快速发展对能源清洁化和社会发展绿色化起着积极的推动作用.对于OSC的发展,提高其光电转换效率(PCE)是最重要的目标之一,而活性层的形貌优劣对器件的PCE值起着决定性的作用.近年来,由于具有良好的形貌调节能力、... 详细信息

有机太阳能电池(OSC)的快速发展对能源清洁化和社会发展绿色化起着积极的推动作用.对于OSC的发展,提高其光电转换效率(PCE)是最重要的目标之一,而活性层的形貌优劣对器件的PCE值起着决定性的作用.近年来,由于具有良好的形貌调节能力、简单的使用方法以及对器件性能显著的提升能力,添加剂在OSC中的应用引起了研究者的广泛关注.本综述简要总结了在OSC发展历程中所使用添加剂的种类、结构以及在器件性能提升中的作用机制,基于添加剂丰富的类型和不同的作用机理与材料性质,从分子结构特征考虑,将添加剂主要划分为非芳环类、单环或者多环芳烃类、具有D-A型分子结构类以及功能结构复杂型四个大类,同时讨论了添加剂在OSC领域的发展前景以及存在的挑战,为未来新型高效添加剂的设计使用提供了指导.

关键词：有机太阳能电池器件效率添加剂形貌优化

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浙江省毛竹总汞分布特征及其生态风险评估

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地球与环境 2024年第3期52卷 286-295页

作者：宋星竹许萍胡勰克曾台楠吴胜春梁鹏浙江农林大学环境与资源学院杭州311300 农业农村部稻米及制品质量监督检验测试中心中国水稻研究所杭州311300 浙江省土壤污染生物修复重点实验室杭州311300

毛竹作为浙江地区重要优良竹种,占浙江省总竹林面积的87.75%。研究竹林总汞分布特征对进一步了解其对汞生物地球化学循环过程的影响具有重要意义。本文对浙江省内9片受人为汞排放源影响较小的(对照林)和12片靠近燃煤火电厂的(火电林)毛... 详细信息

毛竹作为浙江地区重要优良竹种,占浙江省总竹林面积的87.75%。研究竹林总汞分布特征对进一步了解其对汞生物地球化学循环过程的影响具有重要意义。本文对浙江省内9片受人为汞排放源影响较小的(对照林)和12片靠近燃煤火电厂的(火电林)毛竹林鲜叶、落叶、土壤总汞浓度进行取样分析,探讨了人为汞排放源和海拔对毛竹林总汞分布的影响;同时,运用潜在生态风险因子评价了毛竹林土壤汞风险。结果表明,毛竹林可以经叶片吸收大气汞,再通过落叶分解最终将汞积累在土壤中,毛竹林鲜叶总汞浓度均值(88.6±49.0 ng/g)<落叶总汞浓度均值(139.9±71.6 ng/g)<土壤总汞浓度均值(216.4±130.3 ng/g),且鲜叶与落叶(R^(2)=0.57)、落叶与土壤(R^(2)=0.81)的总汞浓度之间均成正相关关系;燃煤电厂排放的大气汞,不仅会直接给周边毛竹林带来较大的汞沉积,而且会促进鲜叶对大气汞的吸收,火电林所有样品总汞浓度均相应高于对照林并且火电林的落叶、土壤样品显著高于对照林(P<0.05);毛竹鲜叶总汞浓度随海拔升高而增加,落叶、土壤总汞浓度与海拔均无显著相关性;火电厂周边毛竹林土壤汞有较强的潜在生态风险。

关键词：大气汞毛竹林火电厂潜在生态风险

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临安区西径山不同森林中的汞迁移及沉降

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生态毒理学报 2024年第2期19卷 218-231页

作者：胡勰克梁煌宋星竹曾台楠梁鹏吴胜春浙江农林大学环境与资源学院杭州311300 浙江省土壤污染生物修复重点实验室杭州311300

森林系统,是汞在地球生物化学过程中极为重要的一环。其中,叶片是大气汞与森林交互作用的主要界面。本文以临安地区的典型落叶林、针叶林为例,进行定点监测,探明不同季节落叶林、针叶林中汞在叶片和林下土壤中的分布状况及其影响因素。... 详细信息

森林系统,是汞在地球生物化学过程中极为重要的一环。其中,叶片是大气汞与森林交互作用的主要界面。本文以临安地区的典型落叶林、针叶林为例,进行定点监测,探明不同季节落叶林、针叶林中汞在叶片和林下土壤中的分布状况及其影响因素。定点监测实验的结果表明,森林汞在垂直方向上具有明显的分层累积现象,其中土壤中汞浓度最高,含量最多,凋落物其次,新鲜叶最低。且阔叶林在各垂直分层中汞含量均显著高于针叶林。2种森林类型汞均在7—9月达到峰值,这与森林生长发育的季节性与夏季土壤汞的再释放相关。凋落物汞输入是森林土壤汞的主要来源之一,而由土壤所固持的汞主要集中于0~10 cm土层,这与0~10 cm土层中含有的大量具有吸附、固定汞能力的有机质相关。另外,对阔叶林与针叶林的沉降通量估算结果显示,阔叶林沉降通量高于针叶林,这与阔叶林凋落物沉降通量显著高于针叶林相关。本研究的结果有助于了解森林叶片汞浓度以及土壤汞负荷的影响,以及不同季节森林叶片汞和土壤汞时空分布状况。同时,本研究也有利于进一步探明浙江省森林汞地球生物化学循环过程的特征与分布情况。

关键词：汞森林汞沉降通量

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Preparation and characterization of LiAl_xCo_yNi_(1-x-y)O_2 particles

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Particuology 2008年第4期6卷 252-257页

作者： Chen-Feng Kao, Kao-Heng Liu Department of Chemical Engineering, Cheng Kung University (NCKU), tainan 70101, Taiwan, China Department of Chemical Engineering Cheng Kung University (NCKU) Tainan 70101 Taiwan China

Lithium-aluminum-cobalt-nickel oxide LiAlxCoyNi1xyO2 particles, generally used as cathode of lithium battery, were prepared by chemical coprecipitation from an aqueous solution of LiOH, Al(NO3)3, Co(NO3)2 and Ni(NO3)2 with NH4OH. XRD, SEM and FTIR were used to examine the effect of nickel content on the product. FTIR patterns showed that increase in nickel content decreased the absorption strength of the peak of spinel structure of the product, attributed to the occupation by nickel in the aluminum sites. Particle size and electrical properties of the lithium-aluminum-cobalt-nickel oxide (abbreviated as LACNO) particles were also determined.

关键词： LiAl_xCo_yNi_(1-x-y)O_2 Chemical coprecipitation Particle size Electrical properties

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Prediction analysis of long-term memory effect for calamity gray series

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Science China Earth Sciences 2004年第3期47卷 209-220页

作者： CHEN Zhaonan (CHEN Chaonan)1 & LI Zongyang (LEE Tzongyeang)2 1. Department of Earth Sciences, National Cheng Kung University, 1 Ta-Hsueh Road, tainan 70101, Taiwan, China 2. Department of Information Management, Leader University, No. 188, Sec 5, Au-Chung Road, tainan 70901, Taiwan, China Department of Earth Sciences National Cheng Kung University 1 Ta-Hsueh Road Tainan 70101 Taiwan Department of Information Management Leader University No. 188 Sec 5 Au-Chung Road Tainan 70901 Taiwan

It is adequate to use the gray theory for modeling and forecasting short-term calamity series. The forecast of calamity gray series is equivalent to predicting an extraordinary event in nature. In order to look for the regularity, the calamity date series, created from the threshold for a fixed time-interval series, are studied. In this paper, the Hurst exponent is applied to defining the long-term memory effect of the simulated calamity series, and is tested for the feasibility of using it as pre-requisite information before the gray modeling and forecasting. Based on the fractional Brownian motion (fBm) model, the time series with a definite length or quantity of data are derived assuming that various kinds of memory effect exist. Different threshold values are defined to yield or to analogize the calamity date series that are required in the prediction of the gray calamity events. After case study, both of the simulated and real seismic data show that the Hurst exponents are greater than 0.5 and, therefore, indicate that the long-term memory ef-fect exists. The correlation between the Hurst exponent and the gray modeling parameter, a, provides criteria for the classification of the forecast.

关键词： gray theory, calamity series, Hurst exponent, long-term memory effect, fractional Brownian motion.

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The Reactions of Sydnone Compounds

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有机化学 1993年第2期 189-191页

作者： TIEN Hsien-Ju HO Young-Shang Department of Chemistry, National Cheng Kung University, tainan, Taiwan 701 Nan-Jeon Junior College of Technology, Yen Shuyi, tainan, Taiwan 737

The duality in electronic effect of sydnone ring and the effect of delocalization of 4-substitutedgroup to sydnone ring are investigated by the nitration of 3-benzyl-4-phenylsydnone and 4-formyl-3-arylsydnones. Sydnon... 详细信息

关键词： sydnone mesoinic compounds reaction

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THREE-DIMENSIONAL NUMERICAL SIMULATION OF INTAKE MODEL WITH CROSS FLOW

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Journal of Hydrodynamics 2011年第3期23卷 314-324页

作者： HSIAO Shih-Chun Department of Hydraulics and Ocean Engineering National Cheng Kung University

The hydrodynamics of a pump sump consisting of a main channel, pump sump, and intake pipe is examined using Truchas a three-dimensional Navier-Stokes solver, with a Large Eddy Simulation （LES） turbulence model. The numerical results of streamwise velocity profiles and flow patterns are discussed and compared with experimental data of Ansar and Nakato. Fairly good agreement is obtained. Furthermore, unlike Ansar et al.＇s inviscid solution, the proposed numerical model includes the effect of fluid viscosity and considers more realistic simulation conditions. Simulation results show that viscosity affects the prediction of flow patterns and that the streamwise velocity can be better captured by including cross flow. The effects of the submergence Froude number on the free surface and streamwise velocity are also examined. The free surface significantly fluctuates at high submergence Froude number flows and the corresponding distribution of streamwise velocity profiles exhibits a trend different from that obtained for low submergence Froude number flows.

关键词： pump sump cross flow submergence Froude number Large Eddy Simulation (LES)

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Block copolymers as efficient cathode interlayer materials for organic solar cells

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 571-578页

作者： Dingqin Hu Jiehao Fu Shanshan Chen Jun Li Qianguang Yang Jie Gao Hua Tang Zhipeng Kan tainan Duan Shirong Lu Kuan Sun Zeyun Xiao Chongqing Institute of Green and Intelligent Technology Chongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400714China MOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems School of Energy&Power EngineeringChongqing UniversityChongqing 400044China Library&Information Center Anhui University of Finance and EconomicsBengbu 233030China

Emerging needs for the large-scale industrialization of organic solar cells require high performance cathode interlayers to facilitate the charge extraction from organic *** addition to improving the efficiency,stability and processability issues are major ***,we design block copolymers with well controlled chemical composition and molecular weight for cathode interlayer *** block copolymer coated cathodes display high optical transmittance and low work *** studies reveal that the block copolymer thin film has abundant conductive channels and excellent longitudinal electron conductivity due to the interpenetrating networks formed by the polymer *** of the cathode interlayers in organic solar cells provide higher power conversion efficiency and better stability compared to the most widelyapplied ZnO ***,no post-treatment is needed which enables excellent processability of the block copolymer based cathode interlayer.

关键词： organic solar cell block copolymer cathode interlayer

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