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Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells 被引量:1
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作者 Wenbin Lai Safakath Karuthedath +4 位作者 Chengyi Xiao Lei Meng Frédéric Laquai Weiwei Li Yongfang Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第1期542-546,共5页
In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable polymers.Three alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,y... In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable polymers.Three alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,yielding three double-cable polymers:PBC6-T,PBC12-T,and PBC24-T,respectively.PBC12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%,while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65%and 1.09%in single-component organic solar cells(SCOSCs).Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport,resulting in better efficiencies.Our work provides an approach to construct double-cable conjugated polymers with long alkyl linkers,and it shows the importance of the linker length for the photovoltaic performance of SCOSCs. 展开更多
关键词 double-cable conjugated polymer Single-component organic solar cell Crystallinity Semirigid linkers Alkyl-thiophene-alkyl
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Near-infrared double-cable conjugated polymers based on alkyl linkers with tunable length for single-component organic solar cells
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作者 Yikun Wang Qiaomei Chen +4 位作者 Shijie Liang Dongdong Xia Chaowei Zhao Christopher R.McNeill Weiwei Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第4期452-456,共5页
The photovoltaic properties of double-cable conjugated polymers are significantly influenced by the length of the alkyl linkers that connect donor backbones and acceptor side units. In this study, a series of 2-(3-oxo... The photovoltaic properties of double-cable conjugated polymers are significantly influenced by the length of the alkyl linkers that connect donor backbones and acceptor side units. In this study, a series of 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile(IC)-based double-cable polymers with alkyl linkers ranging from C_8H_(16)to C_(16)H_(32)(Px, x = 8, 10, 12, 14, 16) were synthesized for single-component organic solar cells(SCOSCs). Among these, the linker length x = 12(P12) is found to optimize the power conversion efficiencies(PCEs) in SCOSCs. Specifically, PCEs increase from P8 to P12 and then decline from P12to P16. Detailed investigations of optical absorption, charge transport, and morphology provide insights into the underlying factors contributing to these PCE variations. The findings indicate that the exceptional photovoltaic properties observed in P12 can be attributed to three key factors: A delicate balance between enhanced charge separation facilitated by the increased spacer length and reduced crystallinity resulting from longer spacers, higher charge mobilities, and well-balanced hole/electron transport characteristics. This study highlights the critical role of linker length in determining the photovoltaic properties of double-cable conjugated polymer-based SCOSCs and offers valuable guidance for the design of novel double-cable conjugated polymers. 展开更多
关键词 Single-component organic solar cells double-cable conjugated polymers Photovoltaic properties Alkyl linkers
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Chlorinated Effects of Double-Cable Conjugated Polymers on the Photovoltaic Performance in Single-Component Organic Solar Cells
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作者 Han-Yi Bao Zhao-Fan Yang +7 位作者 Yan-Jiao Zhao Xiang Gao Xin-Zhu Tong Yi-Nuo Wang Feng-Bo Sun Jian-Hong Gao Wei-Wei Li Zhi-Tian Liu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2023年第2期187-193,共7页
The recently emerged double-cable conjugated polymers have come into focus due to their significantly improved power conversion efficiencies (PCEs) in single-component organic solar cells (SCOSCs). In this work, the e... The recently emerged double-cable conjugated polymers have come into focus due to their significantly improved power conversion efficiencies (PCEs) in single-component organic solar cells (SCOSCs). In this work, the effect of chlorination in double-cable conjugated polymers with linear benzodithiophene backbone and pendant perylene bisimide on the photovoltaic performance in SCOSCs has been studied. After introducing chlorine atoms into conjugated side chains, the highest occupied molecular orbital level of the conjugated polymers is down-shifted, thus resulting in a higher open-circuit voltage. As a result, the chlorinated double-cable conjugated polymer exhibits improved photovoltaic performance from 3.46% to 3.57%. 展开更多
关键词 double-cable conjugated polymer Chlorination Single-component organic solar cells
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A benzo[ghi]-perylene triimide based double-cable conjugated polymer for single-component organic solar cells 被引量:1
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作者 Dan Wang Zhaofan Yang +3 位作者 Feng Liu Chengyi Xiao Yonggang Wu Weiwei Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第1期466-469,共4页
Single-component organic solar cells(SCOSCs)with high stability and simplified fabrication process are supposed to accelerate the commercialization of organic photovoltaics.However,the types of photo-active materials ... Single-component organic solar cells(SCOSCs)with high stability and simplified fabrication process are supposed to accelerate the commercialization of organic photovoltaics.However,the types of photo-active materials and photovoltaic performance of SCOSCs are still far lagging behind the bulk-heterojunction type organic solar cells(BHJ OSCs).It is still an arduous task to introduce new photo-active materials into SCOSCs,aiming to improve the efficiencies of SCOSCs.One feasible way is to construct double-cable polymers with new structures and tune conformation,morphology and mobility for the improvement in power conversion efficiencies(PCEs).Hence,in this work,we constructed a new double-cable polymer PBTT-BPTI by introducing fused core 5,7-dibromo-2,3-bis(2-ethylhexyl)benzo[1,2-b:4,5-c’]dithiophene-4,8-dione(TTDO)into the main backbone and benzo[ghi]-perylene triimide(BPTI)unit into the side chain.Both of the two units show strong electron-withdrawing property,which are expected to broaden absorption spectra and enhance intermolecular interaction.The double-cable polymer exhibited a broad absorption in the range of 300-700 nm with an optical band gap(E_(g))of 1.79 eV.The PCE of PBTT-BPTI-based SCOSCs was 2.15%,which may be limited by the unconstructed efficient electron transporting channels. 展开更多
关键词 double-cable polymer Single-component organic solar cells BPTI Electron withdrawing Electron transporting channels
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Double-Cable Conjugated Polymers with Fullerene Pendant for Single-Component Organic Solar Cells 被引量:1
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作者 Bai-Qiao Liu Yun-Hua Xu +4 位作者 Feng Liu Cheng-Cheng Xie Shi-Jie Liang Qiao-Mei Chen Wei-Wei Li 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第8期898-904,I0007,共8页
In this work,the“functionalization-polymerization”(FP)method has been used to construct fullerene-contained double-cable conjugated polymers with“donor-acceptor”backbones.It was realized via synthesizing a fullere... In this work,the“functionalization-polymerization”(FP)method has been used to construct fullerene-contained double-cable conjugated polymers with“donor-acceptor”backbones.It was realized via synthesizing a fullerene-contained monomer and performing Stille polymerization.With this method,a series of double-cable conjugated polymers with different fullerene contents were developed and applied into single-component organic solar cells.The power conversion efficiencies(PCEs)based on these polymers increased from 0.71%to 1.71%with the enhanced fullerene contents.The relatively low PCEs might be originated from the poor microstructure in these polymers.These new conjugated polymers with molecular heterojunction would show potential application in organic electronic devices. 展开更多
关键词 double-cable conjugated polymers Single-component organic solar cells FULLERENE “Donor-acceptor”conjugated polymers Microphase separation
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Highly sensitive salinity sensor based on Mach-Zehnder interferometer with double-C fiber
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作者 Ya-nan Zhang Like Li +1 位作者 Jincheng Zhao Yong Zhao 《Fundamental Research》 CAS 2022年第2期296-302,共7页
This paper proposes a highly sensitive,compact,and low-cost optical fiber salinity sensor based on the Mach-Zehnder interferometer.The sensor is constructed using a single mode fiber(SMF)-no-core fiber-double-C fiber(... This paper proposes a highly sensitive,compact,and low-cost optical fiber salinity sensor based on the Mach-Zehnder interferometer.The sensor is constructed using a single mode fiber(SMF)-no-core fiber-double-C fiber(DCF)-NCF-SMF structure,with the DCF prepared by etching the dual side-hole fiber with HF acid.The DCF’s large-size exposed microfluidic channels solve the previous microstructured optical fiber’s challenging liquid filling and replacement problems.Theoretical simulations and experiments demonstrate that the sensor is suitable for high-sensitivity salinity measurement.The sensor exhibits a high salinity sensitivity of-2.26 nm/‰ in the salinity range of 10‰-50‰,as demonstrated by the experimental results.Additionally,the sensor exhibits some fascinating characteristics,including high repeatability,hysteresis,reversibility,and stability. 展开更多
关键词 Optical fiber sensor Salinity sensor Mach-Zehnder interferometer Microfluidic channel double-c fiber
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Low temperature,non-halogen solvent processed single-component organic solar cells with 10%efficiency 被引量:1
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作者 Zhou Zhang Jjing Wang +4 位作者 Zhijie Hu Chengyi Xiao Qiaomei Chen Zheng Tang Weiwei Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第12期241-245,共5页
A double-cable conjugated polymer DCPIC-BO is designed via introducing a long-branched alkyl chains 2-buthyloctyl into the acceptor side unit.Compared with the double-cable polymer(DCPIC-EH)with the 2-ethylhexyl alkyl... A double-cable conjugated polymer DCPIC-BO is designed via introducing a long-branched alkyl chains 2-buthyloctyl into the acceptor side unit.Compared with the double-cable polymer(DCPIC-EH)with the 2-ethylhexyl alkyl chains,the solubility of the DCPIC-BO in non-halogen solvents is substantially improved.Therefore,a power conversion efficiency(PCE)of 9.77%can be obtained by the devices processed from o-xylene at 40℃,while the DCPIC-EH cannot be processed due to its poor solubility under this condition.Moreover,PCEs of 10.10%for small-area(0.04 cm^(2))devices and nearly 9%for devices with an area of 1 cm^(2) are achieved using a non-halogenated solid additive in o-xylene,realizing the"absolutely halogen-free"OSC fabrication. 展开更多
关键词 Organic solar cells Non-halogenated solvents double-cable conjugated polymers Long-branched alkyl chains Solubility
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A new strategy for designing polymer electron acceptors:electronrich conjugated backbone with electron-deficient side units 被引量:1
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作者 Fan Yang Xiaohui Wang +5 位作者 Guitao Feng Junshu Ma Cheng Li Junyu Li Wei Ma Weiwei Li 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第7期824-829,共6页
Three "double-cable" conjugated polymers with thienopyrroledione-based backbone and perylene bisimide as side units were designed as electron acceptor for polymer-polymer solar cells. The polymers show broad... Three "double-cable" conjugated polymers with thienopyrroledione-based backbone and perylene bisimide as side units were designed as electron acceptor for polymer-polymer solar cells. The polymers show broad absorption spectra and low-lying frontier energy levels due to both aromatic backbone and side units. The new double-cable polymers can be used as electron acceptor to combine with several electron donors, in which power conversion efficiencies above 3% could be achieved. 展开更多
关键词 POLYMER solar cells electron acceptor conjugated polymer perylene bisimide double-cable
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