检索结果-南通市图书馆

Polymer: non-fullerene acceptor heterojunction-based phototransistor for short-wave infrared photodetection

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3087-3095页

作者： Jing Li Weigang Zhu Yang Han Yanhou Geng Wenping Hu Key Laboratory of Organic Integrated Circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Science&Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Key Laboratory of Organic Integrated Circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300072China

It remains full of challenge for extending short-wave infrared(SWIR)spectral response and weak-light detection in the context of broad spectral responses for *** this work,a novel poly(2,5-bis(4-hexyldodecyl)-2,5-dihydro-3,6-di-2-thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thiophene)(PDPPT3-HDO):COTIC-4F organic bulk-heterojunction is prepared as active layer for bulk heterojunction ***3-HDO serves as a hole transport material,while COTIC-4F enhances the absorption of SWIR light to 1020 *** a result,smooth and connected PDPPT3-HDO film is fabricated by blade coating method and exhibits high hole mobility up to 2.34 cm^(2)·V^(-1)·s^(-1) with a current on/off ratio of 4.72×10^(5) in organic thin film ***3-HDO:COTIC-4F heterojunction phototransistors exhibit high responsivity of 2680 A·W^(-1) to 900 nm and 815 A·W^(-1) to 1020 nm,with fast response time(rise time~20 ms and fall time~100 ms).The photosensitivity of the heterojunction phototransistor improves as the mass ratio of non-fullerene acceptors increases,resulting in an approximately two orders of magnitude enhancement compared to the bare polymer ***,the phototransistor exhibits decent responsivity even under ultra-weak light power of 43μW·cm^(-2) to 1020 *** work represents a highly effective and general strategy for fabricating efficient and sensitive SWIR light photodetectors.

关键词： photodetection phototransistor organic semiconductor heterojunction non-fullerene acceptor

A new chlorinated non-fullerene acceptor based organic photovoltaic cells over 12%efficiency

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Central South University 2020年第12期27卷 3581-3593页

作者： CAO Rui CHEN Yu CAI Fang-fang CHEN Hong-gang LIU Wei GUAN Hui-lan WEI Qing-ya LI Jing CHANG Qin LI Zhe ZOU Ying-ping College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

The method to fluorinate the terminal group has achieved remarkable success and been widely used to fine-tune the intrinsic properties of organic acceptor *** to chlorination,however,it gets less attention and remains ambiguous effect on organic photovoltaic(OPV)***,a new non-fullerene acceptor named Y19 was reported with benzotriazole as the electron-deficient core and 2Cl-ICs as the strong electron-withdrawing end groups.Y19 exhibits a wide film absorption band from 600 nm to 948 nm and low LUMO(the lowest unoccupied molecular orbital)energy level of−3.95 *** devices based on PM6:Y19 show high-power conversion efficiency(PCE)of 12.76%with high open-circuit voltage(Voc)of 0.84 V,short-circuit current density(Jsc)of 22.38 mA/cm2 and fill factor(FF)of 68.18%.Broad external quantum efficiency(EQE)response of over 60%in the range of 480−860 nm can be *** study demonstrates that chlorination,as a low-cost molecular design strategy,has its own superiorities to improve device performance and promote the potential application in OPV.

关键词： non-fullerene acceptor chlorination electron-deficient core device performance

Design and Synthesis of acceptor-Donor-acceptor Type non-fullerene acceptors Using Oxindole-Based Bridge for Polymer Solar Cells Applications

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2022年第3期39卷 272-280页

作者： GUO Yuqing HUANG Jun LI Zheng WU Hongbo WANG Jing TANG Zheng MA Zaifei WANG Ming ZHU Zhijia Key Laboratory of Science and Technology of Eco-Textiles Ministry of Education College of Chemistry Chemical Engineering & Biotechnology Donghua University Shanghai 201620 China Center for Advanced Low-dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China

Two acceptor-donor-acceptor(A-D-A)type non-fullerene acceptors(namely WH1 and WH7)containing the oxindole-based bridge are designed and synthesized for polymer solar cells(PSCs)*** bridge unit is introduced through a precursor(6-bromo-1-octylindoline-2,3-dione)that contains both bromine and carbonyl and provides the feasibility of the Pd-catalyzed cross-coupling reaction and the Knoevenagel condensation,*** facile synthetic approach exhibits the potential to gain high performance non-fullerene acceptors through extendingπ-conjugated backbone with strong light-absorbing building *** synthesis and properties of WH1 and WH7 are demonstrated with different endcap units,then PSCs are fabricated using PBDB-T:WH1 and PBDB-T:WH7 as the active layers,and attain an average power conversion efficiency(PCE)of 2.58%and 6.24%,*** device physics studies afford the deep insight of structure variation influence on the device *** work provides a facile non-fullerene acceptor design strategy and shows how structure variations impact the PSC performance.

关键词： non-fullerene acceptor polymer solar cell(PSC) conjugated molecules donor-acceptor(D-A) narrow bandgap

non-fullerene acceptors with heteroatom substitution on the core moiety for efficient organic photovoltaics

在线全文

学校读者我要写书评

暂无评论

InfoMat 2024年第8期6卷 20-35页

作者： Feng Qi Baobing Fan Qunping Fan Alex K.-Y.Jen Department of Chemistry City University of Hong KongKowloonHong Kongthe People's Republic of China Hong Kong Institute for Clean Energy City University of Hong KongKowloonHong Kongthe People's Republic of China College of Materials Science and Engineering Qingdao UniversityQingdaoPeople's Republic of China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'anPeople's Republic of China Department of Materials Science&Engineering University of WashingtonSeattleWashingtonUSA State Key Laboratory of Marine Pollution City University of Hong KongKowloonHong Kongthe People's Republic of China

Organic photovoltaics(OPVs)represent one of the most promising photovoltaic technologies owing to their high capacity to convert solar energy to *** the continuous structure upgradation of photovoltaic materials,especially that of non-fullerene acceptors(NFAs),the OPV field has witnessed rapid progress with power conversion efficiency(PCE)exceeding 19%.However,it remains challenging to overcome the intrinsic trade-off between the photocurrent and photovoltage,restricting the further promotion of the OPV *** this regard,it is urgent to further tailor the structure of NFAs to broaden their absorption spectra while mitigating the energy loss of relevant devices *** substitution on the fused-ringπ-core of NFAs is an efficient way to achieve this *** addition to improve the nearinfrared light harvest by strengthening the intramolecular charge transfer,it can also enhance the molecular stacking via forming multiple noncovalent interactions,which is favorable for reducing the energetic ***,in this review we focus on the design rules of NFAs,including the polymerized NFAs,of which the core moiety is substituted by various kinds of *** also afford a comprehensive understanding on the structure–propertyperformance relationships of these ***,we anticipate the challenges restricting the efficiency promotion and industrial utilization of OPV,and provide potential solutions based on the further heteroatom optimization on NFA core-moiety.

关键词： core moiety heteroatom substitution near-infrared absorption non-fullerene acceptor organic photovoltaics reduced energy loss

Chlorination of benzyl group on the terminal unit of A_(2)-A_1-D-A_1-A_(2) type nonfullerene acceptor for high-voltage organic solar cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第1期36卷 312-317页

作者： Jinge Zhu Ailing Tang Leyi Tang Peiqing Cong Chao Li Qing Guo Zongtao Wang Xiaoru Xu Jiang Wu Erjun Zhou School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China National Center for Nanoscience and Technology Beijing 100190China Zhongyuan Critical Metals Laboratory Zhengzhou UniversityZhengzhou 450001China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450003China

Benzotriazole(BTA)-based A_(2)-A_1-D-A_1-A_(2)type wide-bandgap(WBG)non-fullerene acceptors(NFAs)have shown promising potential in indoor photovoltaic,and in-depth investigation of their structure-property relationship is of great ***,we explored the chlorination effect of the side chain on the *** introduced Cl atoms into the benzyl side chains in parent BTA5 to synthesize two NFAs,BTA5-Cl with mono-chlorinated benzyl groups and BTA5-2Cl containing bi-chlorinated benzyl *** chose D18-Cl with deep-energy levels and strong crystallinity to pair with these three acceptors,affording high photovoltage and *** the stepwise chlorination,the open-circuit voltage(V_(OC))values decrease from 1.28,1.22,to 1.20 V,while the corresponding power conversion efficiencies(PCEs)improve from 5.07%,9.15%,to 10.96%.Compared with BTA5-based OSCs,introducing Cl atoms downshifts the energy levels and slightly increases the non-radiative energy loss(0.14<0.17<0.19 e V),resulting in a sequential decrease in VO ***,more chlorine atom replacements produce more effective exciton dissociation,higher charge transfer,and balanced carrier mobility in the blend films,ultimately achieving better *** work indicates that chlorination of the benzyl group on the terminals can improve the device's performance,implying good application potential in indoor photovoltaics.

关键词： High open-circuit voltage Benzotriazole non-fullerene acceptor Terminal engineering Chlorination

Unraveling the impacts of intermolecular interaction on morphology evolution for highly efficient organic solar cells and modules

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 264-272页

作者： Xueqing Ma Yingying Cheng Yuqiang Liu Xinming Zheng Guangliu Ran Hongxiang Li Xinyue Cui Andong Zhang Wenkai Zhang Pei Cheng Wenchao Huang Zhishan Bo Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao 266071China Key State Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing 100875China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China

Understanding the effect of intermolecular interaction on the growth dynamic of active layers is critical for advancing organic solar cells(OSCs).However,the diverse structure of donors and acceptors makes the research *** with customizable structures and properties could simplify this ***,we meticulously tailor two additives of 3,4-ethylenedioxythiophene(EDOT)and 2,5-dibromo-3,4-ethylenedioxythiophene(DBEDOT),possessing distinct intermolecular interaction features to elaborate the inherent *** is found that varied interaction strengths can alter film formation *** enhanced intermolecular interaction between the DBEDOT and non-fullerene acceptor BTP-e C9-4F results in pre-aggregation and longer crystallization duration of BTP-e C9-4F,facilitating the formation of films with compact molecular packing and decent phase ***,exciton dissociation and charge transport become more ***,devices processed with DBEDOT exhibit a remarkable power conversion efficiency of 19.35%in small-area OSCs and 14.11%in bladecoated 5 cm×5 cm organic solar ***,OSCs can maintain 80%of their initial efficiency after continuous annealing at 85℃for over 2,100 h.

关键词： organic solar cell non-fullerene acceptor film growth molecular packing intermolecular interaction

Selective fluorination on donor and acceptor for management of efficiency and energy loss in non-fullerene organic photovoltaics

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第4期66卷 1190-1200页

作者： You Chen Peng Lei Yanfang Geng Ting Meng Xiangyu Li Qingdao Zeng Qing Guo Ailing Tang Yufei Zhong Erjun Zhou CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450003China School of Materials Science and Engineering Ningbo Tech UniversityNingbo 315100China

Although fluorination has been proved effective to modulate optoelectronic properties and film morphology,knowledge of managing power conversion efficiency(PCE)and energy loss(Eloss)of organic photovoltaics(OPVs)by selective fluorination on the donor and/or acceptor is *** we designed and synthesized three 1,2,3-benzotriazole(BTA)-based linear polymers(PE45,PE46 and PE47)with different numbers of fluorine atom substitution on the conjugated phenyl side *** classic non-fullerene acceptors(NFAs)Y5(without fluorination)and Y6(with fluorination)were utilized to manage the device efficiency and energy *** results revealed that increasing fluorine substitutions on polymer donor improved the OPV efficiencies when the fluorinated Y6 was used as the acceptor,whereas decreased the PCEs when the non-fluorinated Y5 was used as the *** energy loss declined with the growing fluorine substitutions on polymer donor,and Y5 systems gave the lower values in comparison with the corresponding Y6 *** turns out that PE47:Y6 achieved the highest PCE of 15.58%with an open-circuit voltage(VOC)of 0.84 V(Eloss=0.56 e V)due to the highest and balanced hole/electron mobilities,suppressed bimolecular recombination and fibril network morphology,which is the highest value in the BTA-based ***,PE47:Y5 attained an ultralow non-radiative energy loss of 0.15 e V,which is one of the lowest values among the reported *** work could not only give a direct path on how to manage the efficiency and energy loss by selective fluorination on donor and acceptor,but also show a deep understanding on charge generation,transport and collection induced by selective fluorination.

关键词： fluorination D-π-A polymer non-fullerene acceptor energy loss organic solar cells

A Three-dimensional non-fullerene Small Molecule acceptor for Solution-processed Organic Solar Cellst

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2017年第11期35卷 1687-1692页

作者： Meijia Chang Yunchuang Wang Nailiang Qiu Yuan-Qiu-Qiang Yi Xiangjian Wan Chenxi Li Yongshen Chen State Key Laboratory of Elemento-Organic Chemistry Centre of Nanoscale Science and Technology andKey La- boratory of Functional Polymer Materials College of Chemistry Nankai University Tianjin 300071 China

An acceptor-donor-acceptor （A-D-A） three-dimensional （3D） small molecule acceptor （SFTTIC）, using spiro- bifluorene as the core unit linking with four thieno[3,2-b]thiophenes （TT） and end-capped with 2-（3-oxo-2,3-dihy- dro-lH-inden-l-ylidene）malononitrile （INCN） was developed for solution processed organic solar cells. SFTTIC has a high absorption coefficient up to 3.12 × 105 mol-1,cm-1, good thermal stability and appropriate energy levels. The optimized power conversion efficiency （PCE） of 5.66% and 4.65% was achieved for the devices with PBDB-T：SFTTIC and PTB7-Th：SFTTIC, respectively.

关键词： organic solar cells non-fullerene acceptor solution processed three-dimensional structure

Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2016年第2期59卷 209-217页

作者： Xin Zhang Jiannian Yao Chuanlang Zhan Beijing National Laboratory of Molecular Science Key Laboratory of Photochemistry Chinese Academy of Sciences Institute of Chemistry Chinese Academy of Sciences

non-fullerene organic acceptors have attracted increasing attention in recent years. One of the challenges in the synthesis of non-fullerene organic acceptors is to tune the absorption spectrum and molecular frontier orbitals, affording low bandgap molecules with improved absorption of the near-infrared solar photons. In this paper, we present the synthesis, optoelectronic and photovoltaic properties of a series of dimeric perylene diimide(PDI) based non-fullerene acceptors. These PDI dimers are bridged by oligothiophene(T) from 1T to 6T. With the increase of the oligothienyl size, the highest occupied molecular orbital(HOMO) energy is raised from ?5.65 to ?5.10 e V, while that of the lowest unoccupied molecular orbit(LUMO) is kept constant at ?3.84 e V, affording narrow bandgap from 1.81 to 1.26 e V. The absorption from the oligothiophene occurs between 350 and 500 nm, which is complementary to that from its bridged PDI units, leading to a wide spectral coverage from 350 to 850 nm. The optimal dihedral angle between the bridged two perylene planes is dependent on the oligothienyl size, varying from 5° to 30°. The solubility of the dimers depends on the oligothienyl size and can be tuned by the alkyl chains on the bridged thienyl units. The possible applications as the solution-processable non-fullerene organic acceptor is primarily studied using commercial P3 HT as the blend donor. The photovoltaic results indicate that 1T, 4T and 6T all yield a higher efficiency of ?1.2%, whereas 2T, 3T and 5T all give a lower efficiency of <0.5%. The difference in the cell performance is related with the tradeoff between the differences of absorption, HOMO level and film-morphology between these dimers.

关键词： non-fullerene acceptor organic photovoltaic cell perylene diimide solution-processed bulk-heterojuncti ~n