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Side chain engineering investigation of non-fullerene acceptors for photovoltaic device with efficiency over 15%

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Science China Chemistry 2020年第12期63卷 1799-1806页

作者： Xin Zhang Yunqian Ding huanran feng Huanhuan Gao Xin Ke Hongtao Zhang Chenxi Li Xiangjian Wan Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China

Side chain engineering plays a substantial role for high-performance organic solar cells (OSCs).Herein,a series of non-fullerene acceptor (NFA) molecules with A-D-A structures,TTCn-4F,with gradient substituent lengths of terminal side chains (T-SCs) on the molecular backbones have been designed and *** effects of T-SCs length,ranging from hydrogen atom to n-dodecyl,their optoelectronic properties,thin film molecular packing,blend film morphology,and overall photovoltaic performance have been systematically *** results show that among this series of molecules,TTC8-4F with n-octyl substituent,showed the best photovoltaic performance when applied with PM6 as the donor due to its favorable morphology,balanced charge mobility,effective exciton dissociation and less charge *** on this,its ternary device with F-Br as the secondary acceptor achieved a high PCE of 15.34%with the simultaneously enhanced Voc of 0.938 V,Jscof 22.66 mA cm^-2,and FF of 72.15%.These results indicate that the engineering of T-SCs is an effective strategy for designing high-performance NFAs.

关键词： organic solar cells non-fullerene acceptor side chains

A series of dithienobenzodithiophene based small molecules for highly efficient organic solar cells

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Science China Chemistry 2017年第4期60卷 552-560页

作者： huanran feng Miaomiao Li Wang Ni Bin Kan Yunchuang Wang Yamin Zhang Hongtao Zhang Xiangjian Wan Yongsheng Chen Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials State Key Laboratory and Institute of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of Chemistry Nankai University Tianjin 300071 China School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin 300071 China

Three acceptor-donor-acceptor （A-D-A） small molecules DCAODTBDT, DRDTBDT and DTBDTBDT using dithieno[2,3-d：2＇,3＇-d＇]benzo[1,2-b：4,5-b＇]dithiophene as the central building block, octyl cyanoacetate, 3-octylrhodanine and thiobarbituric acid as the end groups were designed and synthesized as donor materials in solution-processed photovoltaic cells （OPVs）. The impacts of these different electron withdrawing end groups on the photophysical properties, energy levels, charge carrier mobility, morphologies of blend films, and their photovoltaic properties have been systematically investigated. OPVs device based on DRDTBDT gave the best power conversion efficiency （PCE） of 8.34%, which was significantly higher than that based on DCAODTBDT （4.83%） or DTBDTBDT （3.39%）. These results indicate that rather dedicated and balanced consideration of absorption, energy levels, morphology, mobility, etc. for the design of small-molecule-based OPVs （SM-OPVs） and systematic investigations are highly needed to achieve high performance for SM-OPVs.

关键词： acceptor-donor-acceptor dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene solution-processed photovoltaic cells endacceptor moieties

The prior rules of designing Ti_(3)C_(2)T_(x) MXene-based gas sensors

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 505-517页

作者： Yingying Jian Danyao Qu Lihao Guo Yujin Zhu Chen Su huanran feng Guangjian Zhang Jia Zhang Weiwei Wu Ming-Shui Yao School of Advanced Materials and Nanotechnology Interdisciplinary Research Center of Smart SensorsXidian UniversityXi’an 710126China Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced StudyKyoto UniversityKyoto 606-8501Japan Department of Thoracic Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061China

Working temperature,sensitivity,and selectivity are some of the characteristics of the applied gas *** to design and fabricate an ideal gas sensor working at room temperature is still challenging and attracting lots of ***-dimensional(2D)materials with ultra-thin structure have been demonstrated as a family of ideal candidates to achieve this *** them,Ti_(3)C_(2)T_(x) MXene,a kind of layered sheet synthesized by selectively etching MAX phases materials,shows remarkable potential to be the sensitive materials solely or in a ***,their designing rules are still lacking critical thinking from the viewpoint of the intrinsic property of Ti_(3)C_(2)T_(x) MXene based *** this article,two critical features,i.e.,the thickness of the sensitive materials,and the scope of the analytes,are elaborated towards Ti_(3)C_(2)T_(x) MXene based gas sensors after characterizing the performance of sensing reducing gases(NH3 and CO)and oxidizing gas(NO2).First,the thinner the Ti_(3)C_(2)T_(x) MXene sensitive layer,the better the ***,the Ti_(3)C_(2)T_(x) MXene based gas sensor is not suitable for strong and moderate oxidation gas due to its ease of *** two rules are demonstrated,and could be considered with priority both in the future researches and practical applications.

关键词： MXene based sensor prior reducing gases oxidizing gases

Dithienopyrrole Based Small Molecule with Low Band Gap for Organic Solar Cells

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Chinese Journal of Chemistry 2015年第8期33卷 852-858页

作者： Miaomiao Li Wang Ni huanran feng Bin Kan Xiangjian Wan Yamin Zhang Xuan Yang Yongsheng Chen Key Laboratory for Functional Polymer Materials Centre for Nanoscale Science and TechnologyInstitute of Polymer Chemistry Collaborative Innovation of Chemical Science and Engineering ( Tianjin) College of Chemistry Nankai University Tianjin 300071 China

A low band gap acceptor-donor-acceptor （A-D-A） small molecule donor material, named DR3TDTN, has been designed and synthesized for solution-processed organic solar cells. DR3TDTN shows narrow optical band gap with value of 1.49 eV and broad absorption spectrum from 300 to 820 rim. The HOMO and LUMO energy levels of DR3TDTN are -4.74 and -3.26 eV, respectively. The optimized photovoltaic device based on DR3TDTN：PC71BM blend film shows a power conversion efficiency of 3.03% with an open-circuit voltage of 0.67 V, a short-circuit current of 8.22 mA·cm^-2 and fill factor of 0.55.

关键词： organic solar cells low band gap small molecule HOMO energy level

Exploring ternary organic photovoltaics for the reduced nonradiative recombination and improved efficiency over 17.23%with a simple large-bandgap small molecular third component

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Nano Research 2022年第4期15卷 3222-3229页

作者： huanran feng Yvjie Dai Lihao Guo Di Wang Hao Dong Zhihui Liu Lu Zhang Yvjin Zhu Chen Su Yongsheng Chen Weiwei Wu School of Advanced Materials and Nanotechnology Interdisciplinary Research Center of Smart SensorsXidian UniversityShaanxi 710126China Intelligent Perception Research Institute Zhejiang LabHangzhou 311100China State Key Laboratory and Institute of Elemento-Organic Chemistry Key Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityTianjin 300071China

Ternary strategy is one of the most effective methods to further boost the power conversion efficiency(PCE)of organic photovoltaic cells(OPVs).In terms of high-efficiency PM6:Y6 binary systems,there is still room to further reduce energy_(loss)(E_(loss))through regulating molecular packing and aggregation by introducing a third component in the construction of ternary *** we introduce a simple molecule BR1 based on an acceptor-donor-acceptor(A-D-A)structure with a wide bandgap and high crystallinity into PM6:Y6-based *** is proved that BR1 can be selectively dispersed into the donor phase in the PM6:Y6 and reduce disorder in the ternary blends,thus resulting in lower E_(loss,non-rad)and E_(loss).Furthermore,the mechanism study reveals well-develop phase separation morphology and complemented absorption spectra in the ternary blends,leading to higher charge mobility,suppressed recombination,which concurrently contributes to the significantly improved PCE of 17.23%for the ternary system compared with the binary ones(16.21%).This work provides an effective approach to improve the performance of the PM6:Y6-based OPVs by adopting a ternary strategy with a simple molecule as the third component.

关键词： organic photovoltaic ternary bulk heterojunction nonradiative recombination simple small molecule phase separation

Fluorination-modulated end units for high-performance non-fullerene acceptors based organic solar cells

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Science China Materials 2019年第8期62卷 1210-1217页

作者： Yanna Sun Huan-Huan Gao Yuan-Qiu-Qiang Yi Xiangjian Wan huanran feng Xin Ke Yamin Zhang Jing Yan Chenxi Li Yongsheng Chen The Key Laboratory of Functional Polymer Materials State Key Laboratory and Institute of Elemento-Organic Chemistry Centre of Nanoscale Science and Technology College of Chemistry Nankai University

Organic solar cells (OSCs) have drawn great attention for their low cost, light weight, solution processability and flexibility [1-3]. Over the last decade, fullerene and their derivatives have been the dominant electron acceptors for OSCs due to their excellent electron-transport properties, but limited by their disadvantages of poor light absorption, high synthesis cost, and difficulties in property tunability.

关键词：有机太阳能电池富勒烯氟原子端基修饰体高分子轨道光谱红移

NDUFA4通过增强线粒体活化水平促进卵巢癌SKOV3细胞增殖、迁移及侵袭

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现代肿瘤医学 2024年第6期32卷 1024-1032页

作者：孟焕然董辉冯帆帆马鹏珠田雪敏石璐璐杨彩虹宁夏医科大学总医院心脑血管病医院妇科宁夏银川750004 宁夏医科大学总医院宁夏银川750004 宁夏医科大学宁夏银川750004

目的:探讨NDUFA4介导线粒体活化水平对卵巢癌细胞SKOV3增殖、迁移及侵袭的影响。方法:以慢病毒技术建立SKOV3细胞的NDUFA4过表达和沉默模型;CCK-8检测细胞增殖,细胞划痕检测细胞迁移,Transwell检测细胞侵袭,流式细胞术检测线粒体膜电位... 详细信息

目的:探讨NDUFA4介导线粒体活化水平对卵巢癌细胞SKOV3增殖、迁移及侵袭的影响。方法:以慢病毒技术建立SKOV3细胞的NDUFA4过表达和沉默模型;CCK-8检测细胞增殖,细胞划痕检测细胞迁移,Transwell检测细胞侵袭,流式细胞术检测线粒体膜电位和凋亡;Real-time PCR检测线粒体DNA(mtDNA)拷贝数,MT-ND1、MT-ND5、MT-CYB、SDHA、PGC-1α、NRF1和mTFA mRNA的表达;电镜观察线粒体形态,分光光度法检测Complex IV活性水平;Western blot检测PGC-1α、NRF1、mTFA蛋白的表达。结果:SKOV3细胞中实现NDUFA4的过表达和沉默;NDUFA4的过表达提高细胞增殖、侵袭和迁移能力(P<0.05),上调mtDNA拷贝数,上调MT-ND1、MT-ND5、MT-CYB、SDHA、PGC-1α、NRF1和mTFA mRNA水平(P<0.05),上调PGC-1α、NRF1和mTFA蛋白水平(P<0.05),上调线粒体膜电位水平以及Complex IV活性水平(P<0.05),线粒体变多形态正常。而NDUFA4的沉默则相反,线粒体出现空泡化。结论:NDUFA4可能通过加强线粒体的活化和氧化磷酸化的水平在SKOV3细胞中发挥促癌功能。

关键词：卵巢癌SKOV3细胞系 NDUFA4基因线粒体活化氧化磷酸化

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黄腐酸钾提高水稻秧苗耐盐性的作用途径分析

中国水稻科学 2024年第4期38卷 409-421页

作者：候小琴王莹余贝符卫蒙奉保华沈煜潮谢杭军王焕然许用强武志海王建军陶龙兴符冠富中国水稻研究所水稻生物育种全国重点实验室杭州311401 浙江农艺师学院杭州310021 德清县农业技术推广中心德清313200 吉林农业大学农学院长春130118

【目的】盐胁迫是限制水稻等作物产量品质形成的重要环境因子之一,研发能提高水稻耐盐性风险栽培技术有助于保障我国粮食安全。【方法】以日本晴为材料,于水稻秧苗期进行盐胁迫处理,外源喷施适合浓度的黄腐酸钾(Potassium fulvic acid,P... 详细信息

【目的】盐胁迫是限制水稻等作物产量品质形成的重要环境因子之一,研发能提高水稻耐盐性风险栽培技术有助于保障我国粮食安全。【方法】以日本晴为材料,于水稻秧苗期进行盐胁迫处理,外源喷施适合浓度的黄腐酸钾(Potassium fulvic acid,PFA),并取样测定干物质量、光合作用、碳水化合物含量、能量物质、钠钾离子浓度及抗氧酶活性等生理指标。【结果】常规种植条件下,黄腐酸钾对水稻秧苗生长发育影响较小,其株高和干物质量与清水(H_(2)O)处理之间的差异未达显著水平,但盐胁迫处理后黄腐酸钾明显提高了水稻秧苗的干物质量和株高。盐胁迫下,黄腐酸钾显著增强水稻秧苗叶片POD和APX活性,降低其相对电导率、过氧化氢及丙二醛含量;另外,黄腐酸钾处理能减轻盐胁迫对叶绿素含量、实际光量子效率、相对电子传递速率和净光合速率的抑制。黄腐酸钾对碳水化合物含量的影响较小,但能减轻盐胁迫对能量代谢的抑制,表现为盐胁迫后水稻叶片非结构性碳水化合物处理间的差异不明显,但黄腐酸钾处理的叶片ATP含量、能荷值以及ATPase活性均显著高于清水处理。相应地,盐胁迫下黄腐酸钾处理的水稻秧苗叶片、茎及根的钠离子浓度显著下降,钾离子浓度则显著上升。【结论】黄腐酸钾可一定程度上提高水稻叶片光合作用,促进ATP的产生及利用,增强抗氧化能力,维持较高的钾离子浓度以及较低的活性氧、钠离子浓度,进而减轻盐胁迫对水稻秧苗的伤害。研究结果可为水稻秧苗耐盐性栽培技术及化学调控物质的研发提供技术及理论支撑。

关键词：水稻(Oryza sativa L.) 盐胁迫黄腐酸钾抗氧化能力能量代谢

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基于地面激光扫描仪的建筑数字化方法

测绘通报 2011年第6期 39-42页

作者：王峰陈焕然程效军广州市城市规划勘测设计研究院广州广东510060 同济大学测量与国土信息工程系上海200092

通过对同济大学大学生活动中心建筑群以及校史馆的数字化试验,总结出既有建筑的数字化流程,其中包括数据采集、点云去噪补洞、点云配准、表面重建以及模型的纹理映射5个步骤。采用该方法能够得到几何精度较高的、表面带有丰富细节和逼... 详细信息

通过对同济大学大学生活动中心建筑群以及校史馆的数字化试验,总结出既有建筑的数字化流程,其中包括数据采集、点云去噪补洞、点云配准、表面重建以及模型的纹理映射5个步骤。采用该方法能够得到几何精度较高的、表面带有丰富细节和逼真纹理的数字模型。

关键词：三维建模数字建筑激光扫描仪数据采集点云数据