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  • Wiley  (13)
  • Liu, Bin  (13)
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  • 1
    Online Resource
    Online Resource
    Fused Bithiophene Imide Dimer‐Based n‐Type Polymers for High‐Performance Organic Electrochemical Transistors
    Wiley ; 2021
    In:  Angewandte Chemie International Edition Vol. 60, No. 45 ( 2021-11-02), p. 24198-24205
    Details
    In: Angewandte Chemie International Edition, Wiley, Vol. 60, No. 45 ( 2021-11-02), p. 24198-24205
    Abstract: The development of n‐type organic electrochemical transistors (OECTs) lags far behind their p‐type counterparts. In order to address this dilemma, we report here two new fused bithiophene imide dimer (f‐BTI2)‐based n‐type polymers with a branched methyl end‐capped glycol side chain, which exhibit good solubility, low‐lying LUMO energy levels, favorable polymer chain orientation, and efficient ion transport property, thus yielding a remarkable OECT electron mobility ( μ e ) of up to ≈10 −2  cm 2  V −1  s −1 and volumetric capacitance ( C *) as high as 443 F cm −3 , simultaneously. As a result, the f‐BTI2TEG‐FT‐based OECTs deliver a record‐high maximum geometry‐normalized transconductance of 4.60 S cm −1 and a maximum μC * product of 15.2 F cm −1  V −1  s −1 . The μC * figure of merit is more than one order of magnitude higher than that of the state‐of‐the‐art n‐type OECTs. The emergence of f‐BTI2TEG‐FT brings a new paradigm for developing high‐performance n‐type polymers for low‐power OECT applications.
    Type of Medium: Online Resource
    ISSN: 1433-7851 , 1521-3773
    URL: Issue
    URL: Article
    DOI: 10.1002/anie.v60.45
    DOI: 10.1002/anie.202109281
    RVK:
    VA 2100
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2011836-3
    detail.hit.zdb_id: 123227-7
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  • 2
    Online Resource
    Online Resource
    Fused Bithiophene Imide Dimer‐Based n‐Type Polymers for High‐Performance Organic Electrochemical Transistors
    Wiley ; 2021
    In:  Angewandte Chemie Vol. 133, No. 45 ( 2021-11-02), p. 24400-24407
    Details
    In: Angewandte Chemie, Wiley, Vol. 133, No. 45 ( 2021-11-02), p. 24400-24407
    Abstract: The development of n‐type organic electrochemical transistors (OECTs) lags far behind their p‐type counterparts. In order to address this dilemma, we report here two new fused bithiophene imide dimer (f‐BTI2)‐based n‐type polymers with a branched methyl end‐capped glycol side chain, which exhibit good solubility, low‐lying LUMO energy levels, favorable polymer chain orientation, and efficient ion transport property, thus yielding a remarkable OECT electron mobility ( μ e ) of up to ≈10 −2  cm 2  V −1  s −1 and volumetric capacitance ( C *) as high as 443 F cm −3 , simultaneously. As a result, the f‐BTI2TEG‐FT‐based OECTs deliver a record‐high maximum geometry‐normalized transconductance of 4.60 S cm −1 and a maximum μC * product of 15.2 F cm −1  V −1  s −1 . The μC * figure of merit is more than one order of magnitude higher than that of the state‐of‐the‐art n‐type OECTs. The emergence of f‐BTI2TEG‐FT brings a new paradigm for developing high‐performance n‐type polymers for low‐power OECT applications.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v133.45
    DOI: 10.1002/ange.202109281
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
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  • 3
    Online Resource
    Online Resource
    Two Compatible Polymer Donors Enabling Ternary Organic Solar Cells with a Small Nonradiative Energy Loss and Broad Composition Tolerance
    Wiley ; 2020
    In:  Solar RRL Vol. 4, No. 11 ( 2020-11)
    Details
    In: Solar RRL, Wiley, Vol. 4, No. 11 ( 2020-11)
    Abstract: High‐performance nonfullerene ternary organic solar cells (OSCs) with two polymer donors are less frequently reported because of the limited numbers of efficient polymer donors with good compatibility. Herein, a wide‐bandgap polymer P1 with a deep‐lying highest occupied molecular orbital (HOMO) level is incorporated as the third component into the benchmark PM6:Y6 binary system to fabricate ternary OSCs. The introduction of P1 not only leads to extended absorption coverage and forms a cascade‐like energy level alignment but also shows excellent compatibility with PM6, resulting in a favorable morphology in the ternary blend. More importantly, P1 possesses a deeper HOMO level (−5.6 eV) than most well‐known donor polymers, which enables resulting ternary OSCs with an improved open‐circuit voltage. As a result, the optimized ternary OSCs with 40 wt% P1 in donors achieve a power conversion efficiency (PCE) of 16.2% with a small nonradiative recombination loss of 0.23 eV, which is among the highest values of ternary OSCs based on two polymer donors. In addition, the ternary OSCs show a broad composition tolerance with a high PCE of over 14% throughout the whole blend ratios. These results provide an effective approach to fabricate efficient ternary OSCs by synergizing two wide‐bandgap polymer donors.
    Type of Medium: Online Resource
    ISSN: 2367-198X , 2367-198X
    URL: Issue
    URL: Article
    DOI: 10.1002/solr.v4.11
    DOI: 10.1002/solr.202000396
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2882014-9
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  • 4
    Online Resource
    Online Resource
    A Narrow‐Bandgap n‐Type Polymer with an Acceptor–Acceptor Backbone Enabling Efficient All‐Polymer Solar Cells
    Wiley ; 2020
    In:  Advanced Materials Vol. 32, No. 43 ( 2020-10)
    Details
    In: Advanced Materials, Wiley, Vol. 32, No. 43 ( 2020-10)
    Abstract: Narrow‐bandgap polymer semiconductors are essential for advancing the development of organic solar cells. Here, a new narrow‐bandgap polymer acceptor L14, featuring an acceptor–acceptor (A–A) type backbone, is synthesized by copolymerizing a dibrominated fused‐ring electron acceptor (FREA) with distannylated bithiophene imide. Combining the advantages of both the FREA and the A–A polymer, L14 not only shows a narrow bandgap and high absorption coefficient, but also low‐lying frontier molecular orbital (FMO) levels. Such FMO levels yield improved electron transfer character, but unexpectedly, without sacrificing open‐circuit voltage ( V oc ), which is attributed to a small nonradiative recombination loss ( E loss,nr ) of 0.22 eV. Benefiting from the improved photocurrent along with the high fill factor and V oc , an excellent efficiency of 14.3% is achieved, which is among the highest values for all‐polymer solar cells (all‐PSCs). The results demonstrate the superiority of narrow‐bandgap A–A type polymers for improving all‐PSC performance and pave a way toward developing high‐performance polymer acceptors for all‐PSCs.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v32.43
    DOI: 10.1002/adma.202004183
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1474949-X
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  • 5
    Online Resource
    Online Resource
    Semiconducting Polymers Based on Simple Electron‐Deficient Cyanated trans ‐1,3‐Butadienes for Organic Field‐Effect Transistors
    Wiley ; 2023
    In:  Angewandte Chemie International Edition Vol. 62, No. 38 ( 2023-09-18)
    Details
    In: Angewandte Chemie International Edition, Wiley, Vol. 62, No. 38 ( 2023-09-18)
    Abstract: Developing high‐performance but low‐cost n‐type polymers remains a significant challenge in the commercialization of organic field‐effect transistors (OFETs). To achieve this objective, it is essential to design the key electron‐deficient units with simple structures and facile preparation processes, which can facilitate the production of low‐cost n‐type polymers. Herein, by sequentially introducing fluorine and cyano functionalities onto trans ‐1,3‐butadiene, we developed a series of structurally simple but highly electron‐deficient building blocks, namely 1,4‐dicyano‐butadiene ( CNDE ), 3‐fluoro‐1,4‐dicyano‐butadiene ( CNFDE ), and 2,3‐difluoro‐1,4‐dicyano‐butadiene ( CNDFDE ), featuring a highly coplanar backbone and deep‐positioned lowest unoccupied molecular orbital (LUMO) energy levels (−3.03–4.33 eV), which render them highly attractive for developing n‐type semiconducting polymers. Notably, all these electron‐deficient units can be easily accessed by a two‐step high‐yield synthetic procedure from low‐cost raw materials, thus rendering them highly promising candidates for commercial applications. Upon polymerization with diketopyrrolopyrrole ( DPP ), three copolymers were developed that demonstrated unipolar n‐type transport characteristics in OFETs with the highest electron mobility of 〉 1 cm 2  V −1  s −1 . Hence, CNDE , CNFDE , and CNDFDE represent a class of novel, simple, and efficient electron‐deficient units for constructing low‐cost n‐type polymers, thereby providing valuable insight for OFET applications.
    Type of Medium: Online Resource
    ISSN: 1433-7851 , 1521-3773
    URL: Issue
    URL: Article
    DOI: 10.1002/anie.v62.38
    DOI: 10.1002/anie.202307647
    RVK:
    VA 2100
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2011836-3
    detail.hit.zdb_id: 123227-7
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  • 6
    Online Resource
    Online Resource
    Cyano‐Functionalized Pyrazine: A Structurally Simple and Easily Accessible Electron‐Deficient Building Block for n‐Type Organic Thermoelectric Polymers
    Wiley ; 2024
    In:  Angewandte Chemie Vol. 136, No. 11 ( 2024-03-11)
    Details
    In: Angewandte Chemie, Wiley, Vol. 136, No. 11 ( 2024-03-11)
    Abstract: Developing low‐cost and high‐performance n‐type polymer semiconductors is essential to accelerate the application of organic thermoelectrics (OTEs). To achieve this objective, it is critical to design strong electron‐deficient building blocks with simple structure and easy synthesis, which are essential for the development of n‐type polymer semiconductors. Herein, we synthesized two cyano‐functionalized highly electron‐deficient building blocks, namely 3,6‐dibromopyrazine‐2‐carbonitrile (CNPz) and 3,6‐Dibromopyrazine‐2,5‐dicarbonitrile (DCNPz), which feature simple structures and facile synthesis. CNPz and DCNPz can be obtained via only one‐step reaction and three‐step reactions from cheap raw materials, respectively. Based on CNPz and DCNPz, two acceptor–acceptor (A–A) polymers, P(DPP‐CNPz) and P(DPP‐DCNPz) are successfully developed, featuring deep‐positioned lowest unoccupied molecular orbital (LUMO) energy levels, which are beneficial to n‐type organic thin‐film transistors (OTFTs) and OTEs performance. An optimal unipolar electron mobility of 0.85 and 1.85 cm 2 V −1 s −1 is obtained for P(DPP‐CNPz) and P(DPP‐DCNPz), respectively. When doped with N ‐DMBI, P(DPP‐CNPz) and P(DPP‐DCNPz) show high n‐type electrical conductivities/power factors of 25.3 S cm −1 /41.4 μ W m −1 K −2 , and 33.9 S cm −1 /30.4 μ W m −1 K −2 , respectively. Hence, the cyano‐functionalized pyrazine CNPz and DCNPz represent a new class of structurally simple, low‐cost and readily accessible electron‐deficient building block for constructing n‐type polymer semiconductors.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v136.11
    DOI: 10.1002/ange.202319658
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
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  • 7
    Online Resource
    Online Resource
    Semiconducting Polymers Based on Simple Electron‐Deficient Cyanated trans ‐1,3‐Butadienes for Organic Field‐Effect Transistors
    Wiley ; 2023
    In:  Angewandte Chemie Vol. 135, No. 38 ( 2023-09-18)
    Details
    In: Angewandte Chemie, Wiley, Vol. 135, No. 38 ( 2023-09-18)
    Abstract: Developing high‐performance but low‐cost n‐type polymers remains a significant challenge in the commercialization of organic field‐effect transistors (OFETs). To achieve this objective, it is essential to design the key electron‐deficient units with simple structures and facile preparation processes, which can facilitate the production of low‐cost n‐type polymers. Herein, by sequentially introducing fluorine and cyano functionalities onto trans ‐1,3‐butadiene, we developed a series of structurally simple but highly electron‐deficient building blocks, namely 1,4‐dicyano‐butadiene ( CNDE ), 3‐fluoro‐1,4‐dicyano‐butadiene ( CNFDE ), and 2,3‐difluoro‐1,4‐dicyano‐butadiene ( CNDFDE ), featuring a highly coplanar backbone and deep‐positioned lowest unoccupied molecular orbital (LUMO) energy levels (−3.03–4.33 eV), which render them highly attractive for developing n‐type semiconducting polymers. Notably, all these electron‐deficient units can be easily accessed by a two‐step high‐yield synthetic procedure from low‐cost raw materials, thus rendering them highly promising candidates for commercial applications. Upon polymerization with diketopyrrolopyrrole ( DPP ), three copolymers were developed that demonstrated unipolar n‐type transport characteristics in OFETs with the highest electron mobility of 〉 1 cm 2  V −1  s −1 . Hence, CNDE , CNFDE , and CNDFDE represent a class of novel, simple, and efficient electron‐deficient units for constructing low‐cost n‐type polymers, thereby providing valuable insight for OFET applications.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v135.38
    DOI: 10.1002/ange.202307647
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
    Location Call Number Limitation Availability
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    Online Resource
  • 8
    Online Resource
    Online Resource
    Cyano‐Functionalized Pyrazine: A Structurally Simple and Easily Accessible Electron‐Deficient Building Block for n‐Type Organic Thermoelectric Polymers
    Wiley ; 2024
    In:  Angewandte Chemie International Edition Vol. 63, No. 11 ( 2024-03-11)
    Details
    In: Angewandte Chemie International Edition, Wiley, Vol. 63, No. 11 ( 2024-03-11)
    Abstract: Developing low‐cost and high‐performance n‐type polymer semiconductors is essential to accelerate the application of organic thermoelectrics (OTEs). To achieve this objective, it is critical to design strong electron‐deficient building blocks with simple structure and easy synthesis, which are essential for the development of n‐type polymer semiconductors. Herein, we synthesized two cyano‐functionalized highly electron‐deficient building blocks, namely 3,6‐dibromopyrazine‐2‐carbonitrile (CNPz) and 3,6‐Dibromopyrazine‐2,5‐dicarbonitrile (DCNPz), which feature simple structures and facile synthesis. CNPz and DCNPz can be obtained via only one‐step reaction and three‐step reactions from cheap raw materials, respectively. Based on CNPz and DCNPz, two acceptor–acceptor (A–A) polymers, P(DPP‐CNPz) and P(DPP‐DCNPz) are successfully developed, featuring deep‐positioned lowest unoccupied molecular orbital (LUMO) energy levels, which are beneficial to n‐type organic thin‐film transistors (OTFTs) and OTEs performance. An optimal unipolar electron mobility of 0.85 and 1.85 cm 2 V −1 s −1 is obtained for P(DPP‐CNPz) and P(DPP‐DCNPz), respectively. When doped with N ‐DMBI, P(DPP‐CNPz) and P(DPP‐DCNPz) show high n‐type electrical conductivities/power factors of 25.3 S cm −1 /41.4 μ W m −1 K −2 , and 33.9 S cm −1 /30.4 μ W m −1 K −2 , respectively. Hence, the cyano‐functionalized pyrazine CNPz and DCNPz represent a new class of structurally simple, low‐cost and readily accessible electron‐deficient building block for constructing n‐type polymer semiconductors.
    Type of Medium: Online Resource
    ISSN: 1433-7851 , 1521-3773
    URL: Issue
    URL: Article
    DOI: 10.1002/anie.v63.11
    DOI: 10.1002/anie.202319658
    RVK:
    VA 2100
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 2011836-3
    detail.hit.zdb_id: 123227-7
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  • 9
    Online Resource
    Online Resource
    Sequential Cyanation of Polythiophenes: Tuning Charge Carrier Polarity in Organic Electrochemical Transistors
    Wiley ; 2023
    In:  Advanced Electronic Materials
    Details
    In: Advanced Electronic Materials, Wiley
    Abstract: Polythiophenes, built on head‐to‐head (HH) linked 3,3′‐oligomer ethylene glycol‐2,2′‐bithiophene (gT2), have simple chemical structure, good backbone planarity, and relatively high‐lying the lowest unoccupied molecular orbital (LUMO) energy levels, hence showing excellent p‐type performance in organic electrochemical transistors (OECTs) with µC * of several hundred F cm −1 V −1 s −1 . In this study, sequential cyano substitution is utilized to enable transformation of charge carrier polarity from p‐type to n‐type in OECTs, based on the parent polythiophene g4T2‐T2. With the increase of cyano group number, the polythiophenes exhibit gradually lowered LUMO levels from −2.55 to −3.90 eV. As a result, from g4T2‐T2 to CNg4T2‐CNT2, the p‐type performance dramatically diminishes accomplished by the enhancement of n‐type one when applied in OECTs. To the authors' delight, polymer CNg4T2‐CNT2 with the highest content of cyano groups exhibits a remarkable n‐type µC * of 27.01 F cm −1 V −1 s −1 and high g m,norm of 6.75 S cm −1 with negligible p‐type character. This study demonstrates that sequential cyano substitution provides a powerful approach for developing high‐performance n‐type polymers for OECT applications.
    Type of Medium: Online Resource
    ISSN: 2199-160X , 2199-160X
    URL: Article
    DOI: 10.1002/aelm.202300207
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2810904-1
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  • 10
    Online Resource
    Online Resource
    A Terpolymer Acceptor Enabling All‐Polymer Solar Cells with a Broad Donor:Acceptor Composition Tolerance and Enhanced Stability
    Wiley ; 2020
    In:  Solar RRL Vol. 4, No. 11 ( 2020-11)
    Details
    In: Solar RRL, Wiley, Vol. 4, No. 11 ( 2020-11)
    Abstract: Achieving a broad donor:acceptor (D:A) composition tolerance in efficient organic solar cells (OSCs) is important for printing large‐area solar cell modules. Herein, all‐polymer solar cells (all‐PSCs) based on new terpolymer acceptors and a well‐known polymer donor PTB7‐Th are fabricated to explore the effect of D:A ratio on morphology and photovoltaic performances. The all‐PSCs show a promising power conversion efficiency (PCE) of 7.23% with an optimum D:A ratio of 1:2 and retain over 40% of its optimal PCE with ultrabroad D:A composition tolerance from 1:30 to 10:1. In addition, the all‐PSCs can maintain 90% of its original PCE after 400 h of storage despite such broad range of D:A ratio, which is much better than those of other types of OSCs and even better than the benchmark all‐polymer system with N2200 as the acceptor under the same condition. The results show the superiority of the all‐PSCs in terms of D:A ratio tolerance and performance stability, which should be conducive to practical applications of all‐PSCs.
    Type of Medium: Online Resource
    ISSN: 2367-198X , 2367-198X
    URL: Issue
    URL: Article
    DOI: 10.1002/solr.v4.11
    DOI: 10.1002/solr.202000436
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2882014-9
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