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Altering alkyl-chains branching positions for boosting the performance of small-molecule acceptors for highly efficient nonfullerene organic solar cells

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Science China Chemistry 2020年第3期63卷 361-369页

作者： Zhenghui Luo Rui Sun Cheng Zhong Tao Liu Guangye Zhang Yang Zou xuechen jiao Jie Min Chuluo Yang Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Department of ChemistryWuhan UniversityWuhan 430072China The Institute for Advanced Studies Wuhan UniversityWuhan 430072China eFlexPV Limited(China) ShenzhenChina Department of Materials Science and Engineering Monash UniversityVictoriaAustralia

The emergence of the latest generation of small-molecule acceptor(SMA)materials,with Y6 as a typical example,accounts for the surge in device performance for organic solar cells(OSCs).This study proposes two new acceptors named Y6-C2 and Y6-C3,from judicious alteration of alkyl-chains branching positions away from the Y6 *** to the Y6,the Y6-C2 exhibits similar optical and electrochemical properties,but better molecular packing and enhanced *** contrast,the Y6-C3 shows a significant blue-shift absorption in the solid state relative to the Y6 and *** as-cast PM6:Y6-C2-based OSC yields a higher power conversion efficiency(PCE)of 15.89%than those based on the Y6(15.24%)and Y6-C3(13.76%),representing the highest known value for as-cast nonfullerene ***,the Y6-C2 displays a good compatibility with the ***,a ternary OSC device based on PM6:Y6-C2:PC71BM(1.0:1.0:0.2)was produced,and it exhibits an outstanding PCE of 17.06%and an impressive fill factor(FF)of *** results improve understanding of the structureproperty relationship for state-of-the-art SMAs and demonstrate that modulating the structure of SMAs via fine-tuning of alkylchains branching positions is an effective method to enhance their performance.

关键词： alkyl-chain branching position small molecular acceptor organic solar cell power conversion efficiency fill factor

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High-performance all-polymer solar cells with only 0.47 eV energy loss

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Science China Chemistry 2020年第10期63卷 1449-1460页

作者： Qiang Wu Wei Wang Tao Wang Rui Sun Jing Guo Yao Wu xuechen jiao Christoph J.Brabec Yongfang Li Jie Min The Institute for Advanced Studies Wuhan UniversityWuhan 430072China Beijing National Laboratory for Molecular Sciences Beijing 100190China Key Laboratory of Materials Processing and Mold(Ministry of Education) Zhengzhou UniversityZhengzhou 450002China Department of Materials Science and Engineering Monash UniversityAustralian SynchrotronClaytonVictoriaAustralia Institute of Materials for Electronics and Energy Technology(i-MEET) Friedrich-A lexander-Universitat-Erlangen-NiirnbergErlangenGermany

The field of all-polymer solar cells(all-PSCs)has experienced rapid development during the past few years,mainly driven by the development of efficient polymer ***,the power conversion efficiencies(PCEs)of the all-PSCs are still limited by insufficient light absorption of the donor/acceptor blend and large energy loss in *** herein designed a polymer acceptor PYT1 constructed n-type molecular acceptor Y5-C20 as the key building block and blended it with a polymer donor PM6 to obtain an all-polymer photoactive *** optimized PM6:PYT1 all-PSCs achieved a record higher PCE of 13.43%with a very low energy loss of 0.47 eV and a photoresponse of up to 900 nm compared with the Y5-C20 based device with a best PCE of 9.42%.Furthermore,the PCEs of the PM6:PYT1 all-PSCs are relatively insensitive to the 1-chloronaphthalene(CN)additive contents and active layer *** results also highlight the effect of CN additive on PM6:PYT1 morphology,i.e.,charge generation,and transport find an optimized balance,and radiative and non-radiative loss is simultaneously reduced in the *** work promotes the development of high-performance polymer acceptors and heralds a brighter future of all-PSCs for commercial applications.

关键词： all-polymer solar cells polymer acceptor absorption coefficient energy loss mechanical stability

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Interface-enhanced organic solar cells with extrapolated T80 lifetimes of over 20 years

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Science Bulletin 2020年第3期65卷 208-216页

作者： Xiang Xu Jingyang Xiao Guichuan Zhang Long Wei xuechen jiao Hin-Lap Yip Yong Cao State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Innovation Center of Printed Photovoltaics South China Institute of Collaborative InnovationDongguan 523808China Department of Materials Science and Engineering Monash UniversityVictoria 3800Australia Australian Synchrotron ANSTOClaytonVictoria 3168Australia

With recent advances in the power conversion efficiency(PCE)of organic solar cells(OSCs)based on novel donor and non-fullerene acceptor(NFAs),improving the stability of these systems has become the most important issue for their practical ***,an efficient and highly stable OSC,containing a novel polymer donor and a non-fullerene acceptor system,is *** OSC is based on an inverted device structure that utilizes a self-assembled fullerene monolayer(C60-SAM)as the cathode modification layer,and an efficient and highly stable OSC composes of a polymer donor of poly[4,8-bis(5-(2-ethyl hexyl)thiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene-alt-3-fluorothie-no[3,4-b]thiophene-2-c arboxylate](PTB7-Th)and a non-fullerene acceptor of(2,2’-((2 Z,2’Z)-(((4,4,9,9-Tetrakis(4-hexylphenyl)-4,9-dihydro-sindaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(4-((2 ethylhexyl)oxy)thiophene-5,2-diyl))bis(metha nylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-l H-indene-2,1-diylidene))dimalononitrile)(IEICO-4 F)is presented,showing a PCE of 10%.It further achieves an extrapolated T80 lifetime(the time required to reach 80%of initial performance)of 34,000 h,operating under one sun illumination equivalent Based on an estimated solar irradiance of 1500 kWh/(m2 year)for China,a potential lifetime of22 years is inferred for the *** investigation reveals that the reported C60-SAM modification stabilizes the OSC active layer morphology by lowering the surface energy of the underlying ZnO electron transport layer and suppressing trap-assisted recombination,thereby improving *** results of this work establish important guidelines for the development of non-fullerene based OSCs with enhanced stability and pave the way for the commercialization of OSC technology.

关键词： Organic solar cell Non-fullerene acceptor Photostability Interlayer modification Green solvent

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Shorter alkyl chain in thieno[3,4-c]pyrrole-4,6-dione(TPD)-based large bandgap polymer donors – Yield efficient non-fullerene polymer solar cells

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Journal of Energy Chemistry 2021年第2期30卷 69-76,I0003页

作者： Jiaji Zhao Xuelong Huang Qingduan Li Shengjian Liu Ziqiang Fan Di Zhang Shanshan Ma Zhixiong Cao xuechen jiao Yue-Peng Cai Fei Huang School of Chemistry Guangzhou Key Laboratory of Materials for Energy Conversion and StorageGuangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and StorageSouth China Normal University(SCNU)Guangzhou 510006GuangdongChina Department of Materials Science and Engineering Monash UniversityVictoria 3800Australia Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology(SCUT)Guangzhou 510640GuangdongChina College of Pharmacy Cannan Medical UniversityGanzhou 341000JiangxiChina

Typically,conjugated polymers are composed of conjugated backbones and alkyl side *** this contribution,a cost-effective strategy of tailoring the length of alkyl side chain is utilized to design highperforming thieno[3,4-c]pyrrole-4,6-dione(TPD)-based large bandgap polymer donors PBDT-BiTPD(Cχ)(χ=48,52,56),in which x represents the alkyl side chain length in term of the total carbon number.A combination of light absorption,device,and morphology examinations make clear that the shorter alkyl side chains yield(i) higher crystallinity and more predominant face-on crystallite orientation in their neat and BHJ blend films,(ii) higher charge mobilities(6.7×10^(-4) cm~2 V^(-1) s^(-1) for C48 vs.3.2×10^(-4) cm~2 V^(-1) s^(-1) for C56),and negligible charge recombination,consequently,(iii) significantly improved fill-factor(FF) and short current(J_(SC)),while almost the same open circuit voltage(V_(OC)) of ca.0.82 V in their corresponding BHJ *** parallel,as alkyl side chain lengths decrease from C56 to C48,power conversion efficiencies(PCEs) increased from 7.8% for C56 to 11.1% for C52,and further to14.1% for C48 in their BHJ solar cells made with a narrow bandgap non-fullerene acceptor *** systematic study declares that shortening the side chain,if providing appropriate solubility in device solution processing solvents,is of essential significance for developing high-performing polymer donors and further improving device photovoltaic performance.

关键词： Polymer solar cells Polymer donors Thieno[3 4-c]pyrrole-4 6-dione Bulk heterojunction Side chain

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Fundamental understanding of high-capacity lithium-excess cathodes with disordered rock salt structure

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Journal of Materials Science & Technology 2021年第15期74卷 60-68页

作者： Hao Lin Beatriz Moreno Kamil Kucuk Sensen Zhang Shankar Aryal Zheng Li Carlo U.Segre Jassiel Rodriguez Dhanya Puthusseri Lirong Cai xuechen jiao Vilas G.Pol Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIN47907USA Department of Materials Science and Engineering Iowa State UniversityAmesIA 50011USA Canadian Light Source Inc. SaskatoonSaskatchewan S7N 5A8Canada Department of Physics&CSRRl Illinois Institute of TechnologyChicagoIL60616 USA School of Metallurgy Northeastern University.Shenyang 110819China Advanced Photon Source Argonne National LaboratoryArgonneIllinois 60439USA Australian Synchrotron ANSTOClaytonVictoria 3168Australia

As a new class of lithium rich cathodes,disordered rock-salt cathodes have been of primary interest,because of their ability to deliver a promisingly high capacity up to 300 mAh/***,some fundamental issues are yet to be fully understood and a comprehensive mastering of their solid-state chemistry,kinetics and thermal stability is ***,we select a high capacity cation-disordered positive electrode-Li_(1.2)Ni_(0.4)Nb_(0.4)O_(2)as a model compound to study intrinsic reaction mechanism,including charge compensation mechanism,kinetics,thermal stability,and structural *** combining soft and hard X-ray absorption spectroscopy(XAS),X-ray photoelectron spectroscopy(XPS)with operando and exsitu differential scanning calorimetry(DSC),galvanostatic intermittent titration technique(GITT),cyclic voltammetry(CV),and X-ray diffraction(XRD),we present holistic information on disordered rock-salt *** work provides beneficial insights into designing and tailoring new positive electrodes with disordered rock-salt structure.

关键词： Salt-rock structure Hard/soft XAS In-situ DSC Structural evolution

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Thermally stable poly(3-hexylthiophene):Nonfullerene solar cells with efficiency breaking 10%

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Aggregate 2022年第5期3卷 205-216页

作者： Mengyuan Gao Yang Liu Kaihu Xian Zhongxiang Peng Kangkang Zhou Junwei Liu Saimeng Li Fei Xie Wenchao Zhao Jidong Zhang xuechen jiao Long Ye School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjinChina National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefeiChina Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingChina State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina

Solar cells featuring polythiophenes as donors are one of the optoelectronic devices that hold notable promises for commercial application,profiting from the lowest synthetic complexity and excellent ***,the complex phase behaviors of polythiophenes and their blends put constraints on modulating electrical performance and thus realizing stable performance under thermal *** this contribution,we present a multi-technique approach that combines calorimetry,scattering,spectroscopy,and microscopy to thoroughly probe the thermodynamic mixing,thermal properties of materials,the evolution of nanoscale domain structure,and device performance of poly(3-hexylthiophene)(P3HT)with a range of nonfullerene acceptors(NFAs)such as ITIC,IDTBR,and ***,two blending guidelines are established for matching these popular NFAs with P3HT to enable highly efficient and thermally stable ***,blend systems with weak vitrification and hypo-miscibility are excellent candidates for efficient solar ***,high thermal stability can be achieved by selecting NFAs with diffusion-limited *** P3HT:ZY-4Cl blend was found to endow the best performance of over 10%efficiency and an exceptionally high T_(80) lifetime of>6000 h under continuous thermal annealing,which are among the highest values for P3HT-based solar *** realization of high thermal stability and efficiency demonstrates the remarkable potentials of simple polythiophene:nonfullerene pairs in electronic applications.

关键词： multi-technique approach organic solar cells phase separation polythiophene thermal stability

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Recent advances in chemical protein synthesis:method developments and biological applications

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Science China Chemistry 2024年第4期67卷 1060-1096页

作者： Suwei Dong Ji-Shen Zheng Yiming Li Huan Wang Gong Chen Yongxiang Chen Gemin Fang Jun Guo Chunmao He Honggang Hu xuechen Li Yanmei Li Zigang Li Man Pan Shan Tang Changlin Tian Ping Wang Bian Wu Chuanliu Wu Junfeng Zhao Lei Liu State Key Laboratory of Natural and Biomimetic Drugs and School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Division of Life Sciences and Medicine University of Science and Technology of ChinaHefei 230027China School of Food and Biological Engineering Engineering Research Center of Bio-processMinistry of EducationHefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Department of Chemistry Tsinghua UniversityBeijing 100084China Institute of Health Sciences Anhui UniversityHefei 230601China College of Chemistry Central China Normal UniversityWuhan 430079China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China School of Medicine or Institute of Translational Medicine Shanghai UniversityShanghai 200444China Department of Chemistry The University of Hong KongHong Kong 999077China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Life Sciences University of Science and Technology of ChinaHefei 230026China Department of Chemical Biology Shanghai Jiao Tong UniversityShanghai 200240China Institute of Microbiology Chinese Academy of SciencesBeijing 100101China Department of Chemistry Xiamen UniversityXiamen 361005China School of Pharmaceutical Science Guangzhou Medical UniversityGuangzhou 511436China

The central dogma of modern biology underscores the pivotal roles proteins play in diverse biological processes,the study of which necessitates advanced methods to produce proteins with precision and *** protein synthesis,a powerful approach utilizing chemical reactions for the de novo construction of structurally accurate proteins,has emerged as a transformative tool for studying proteins and generating protein derivatives/mimics inaccessible by natural biological machinery,including post-translationally modified proteins,proteins comprised of unnatural amino acids,as well as mirror-image *** review summarizes recent strides in synthetic method developments for chemical protein synthesis,including innovative techniques in solid-phase peptide synthesis,the challenges presented by difficult sequences in either synthesis or folding and the exploration of novel ligation reactions using both chemical and enzymatic ***,the review also delves into newly developed protocols for site-selective protein modifications and the generation of stapled or macrocyclized peptides/miniproteins,highlighting the power of chemical methods to make structurally diverse *** applications of synthetic proteins in investigating post-translational modifications(phosphorylation,lipidation,glycosylation,ubiquitination,etc.),mirror-image biological processes and drug development are further ***,these topics provide a comprehensive overview of the current landscape of chemical protein synthesis.

关键词： chemical protein synthesis solid-phase peptide synthesis ligation reactions post-translational modifications mirror-image proteins peptide drugs

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Direct generation of a stable multi-beam pulsed 355 nm UV laser based on a micro-lens array

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Chinese Optics Letters 2022年第4期20卷 49-53页

作者： jiao Wei Pixian Jin xuechen Cao Jing Su Huadong Lu Kunchi Peng State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Multi-beam laser processing is a very popular method to improve processing efficiency. For this purpose, a compact and stable multi-beam pulsed 355 nm ultraviolet(UV) laser based on a micro-lens array(MLA) is presented in this Letter. It is worth noting that the MLA is employed to act as the spatial splitter as well as the coupling lens. With assistance of the MLA,the 1064 nm laser and 532 nm laser are divided into four sub-beams and focused at different areas of the third-harmonic generation(THG) crystal. As a result, the multi-beam pulsed 355 nm UV laser is successfully generated inside the THG crystal. The measured pulse widths of four sub-beams are shorter than 9 ns. Especially, the generated four sub-beams have good long-term power stability benefitting from the employed MLA. We believe that the generated stable multi-beam355 nm UV laser can meet the requirement of high-efficiency laser processing, and the presented method can also pave the way to generate stable and long-lived multi-beam UV lasers.

关键词： micro-lens array third-harmonic generation direct generation pulsed UV laser

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糖尿病综合管理中的药物相互作用调查与分析

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中国药业 2024年第8期33卷 115-120页

作者：马雪辰沈珑俞彬滨曹莉华施芳红青海省西宁市第三人民医院青海西宁810005 上海交通大学医学院附属仁济医院上海200127 浙江省台州市第一人民医院浙江台州318020

目的分析糖尿病综合管理中药物相互作用(DDI)的特点及影响因素。方法使用Lexi-InteractTM数据库,筛选糖尿病综合管理中降血糖药、降血压药、调血脂药、减重药的DDI,根据严重程度分为X级(避免联用)、D级(考虑调整治疗)、C级(需监控治疗)... 详细信息

目的分析糖尿病综合管理中药物相互作用(DDI)的特点及影响因素。方法使用Lexi-InteractTM数据库,筛选糖尿病综合管理中降血糖药、降血压药、调血脂药、减重药的DDI,根据严重程度分为X级(避免联用)、D级(考虑调整治疗)、C级(需监控治疗)、B级(无须调整)、A级(无DDI);收集上海某三级甲等医院2型糖尿病并心肌梗死患者的病例资料,并根据患者的DDI数量分为低DDI组(<5组DDI)和高DDI组(≥5组DDI),分析DDI的特点及影响因素。结果共纳入109种药物,其中降血压药、降血糖药、调血脂药、减重药分别有57种、32种、19种、1种,DDI分别有5091组、1086组、723组、15组。除减重药外,其余3种药物DDI总数最多的分别为钙通道阻滞剂(CCB)、磺脲类药物、他汀类药物;X级药物DDI数量排名前3的药物分别为他汀类药物、CCB类药物及β受体拮抗药。共纳入患者69例,其中低DDI组和高DDI组分别有26例、43例,影响患者DDI总数的危险因素包括患者合并用药数量、慢性肾脏病(CKD)1-3期,以及糖化血红蛋白、糖化白蛋白和空腹血糖水平(P<0.05)。结论控制合并用药数量并保持良好的血糖水平,有利于减少糖尿病综合管理中的DDI。

关键词：糖尿病综合管理降血糖调血脂降血压体质量药物相互作用危险因素

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腔共振增强瓦级单频1240 nm拉曼激光器

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中国激光 2021年第5期48卷 168-174页

作者：曹雪辰魏娇靳丕铦苏静卢华东山西大学光电研究所量子光学与光量子器件国家重点实验室山西太原030006 山西大学极端光学协同创新中心山西太原030006

采用高质量的全固态连续单频1064 nm红外激光器作为泵浦源,以金刚石晶体作为拉曼增益介质,利用腔共振增强技术设计了一种双共振腔,实现了瓦级输出的低泵浦阈值单频1240 nm拉曼激光器。根据金刚石晶体的实际参数,通过优化设计得到了谐振... 详细信息

采用高质量的全固态连续单频1064 nm红外激光器作为泵浦源,以金刚石晶体作为拉曼增益介质,利用腔共振增强技术设计了一种双共振腔,实现了瓦级输出的低泵浦阈值单频1240 nm拉曼激光器。根据金刚石晶体的实际参数,通过优化设计得到了谐振腔对泵浦光的最佳透射率。当透射率为3.5%时,利用Hansch-Couillaud偏振锁定系统将拉曼谐振腔的腔长精确锁定到泵浦光的共振频率处,实验测量到的拉曼激光器的泵浦阈值功率只有2.73 W。在此基础上,当单频1064 nm泵浦功率增加到9.17 W时,获得了1.48 W稳定单频的1240 nm拉曼激光输出,对应的斜效率为24.9%,30 min内的功率稳定性优于1.10%(均方根),x,y方向的光束质量M2因子均优于1.2。该双共振腔的设计为降低拉曼过程阈值、获得稳定单频的高功率拉曼激光提供了一种有效的途径。

关键词：激光器拉曼激光器双共振腔偏振锁定单频

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