Effect of Thieno[3,2-b]thiophene π-bridge on photovoltaic performance of a D-A copolymer of alkoxy-benzodithiophene-alt-fluoro-benzotriazole

Yan, Tinghai; Bin, Haijun; Sun, Chenkai; Zhang, Zhi–Guo; Li, Yongfang

doi:10.1016/j.orgel.2018.01.018

Cited by 12 publications

(5 citation statements)

References 30 publications

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“…Compared with P(BDT-TT-BT): PC 71 BM based OSC, theV oc in PBDT-TTBTT: PC 71 BM based and PBDT-ff-BT: PC 70 BM based OSCs has slightly enhanced, while J sc and FF haven't been improved. Furthermore, between the characterization results of J41 (2018) , [300] BDT-TTBTA (2020) [301] and BDT-TTFBA (2020) , [301] the better photoelectric performance exhibited by J41: ITIC based OSC also verified that only introducing suitable solubilized alkyl chain into the polymer backbone can achieve positive optimization on OSC devices. In addition, PBDT-TT (2014) , [283] PBDT-TTIDD (2018) [302] and PBDT-TTffIDD (2018) [302] were also successfully synthesized by introducing TT based π-bridge units.…”

Section: As For the Main-chain Engineering Bdt-t-bsdz-t Bdt-t-btz-t A...mentioning

confidence: 71%

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

Lin,

Peng,

Shi

et al. 2023

Preprint

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In recent decades, the demand for clean and renewable energy has grown increasingly urgent due to the irreversible alteration of the global climate. As a result, efficient organic solar cells (OSCs) have gradually gained attention as a study hotspot. To break up this dilemma, this paper reviews the molecular design strategies of benzodithiophen (BDT)-based polymer and small molecule donor materials since their birth, focusing on the development of main-chain engineering, side-chain engineering and other unique molecular design paths. Up to now, the state-of-the-art power conversion efficiency (PCE) of binary OSCs prepared by BDT-based donor materials has approached 20%. Our work detailly discusses the potential relationship between the molecular changes of donor materials and photoelectric performance in corresponding OSC devices, thereby presenting a rational molecular design guidance for stable and efficient donor materials in future.

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Section: As For the Main-chain Engineering Bdt-t-bsdz-t Bdt-t-btz-t A...mentioning

confidence: 71%

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

Lin,

Peng,

Shi

et al. 2023

Preprint

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“…As a typical TT-bridged copolymer reported earlier, J41 shows slightly blue-shifted absorption in comparison with the copolymer J40 with T as the π-bridge. 38 J41 exhibits stronger π–π stacking and thus higher hole-mobility because of the better planarity than J40 . As a result, the J41 device exhibited a higher PCE of 8.74% with ITIC as the acceptor than that with J40 as the donor (PCE = 6.48%).…”

Section: Tt-bridged D–π–a Copolymers Based On Bta As the A-unitsmentioning

confidence: 99%

Conjugated D–π–A photovoltaic polymers containing thieno[3,2-b]thiophene π-bridge

Zhou,

Dai,

Zhou

et al. 2024

Mater. Chem. Front.

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“…基于 J40/ITIC(w/w, 1∶1)器件的 V oc 为 0.89 V, J sc 为 12.2 mA/cm 2 , FF 为 60.1%, PCE 为 6.48%. 在此基础上, 后继研究中 [41] 以并噻吩(TT)作为共轭 π 桥, 设计合成了 J41(图 5j), 其 E LUMO 明显降低, 吸收边界轻微蓝移约 10 nm. 基于 J41/ITIC(w/w, 1∶1)器件的 V oc 为 0.93 V, J sc 为 13.7 mA/cm 2 Energy Level/eV 图 6 基于柔性侧链取代的 BDT 单元或其衍生物构筑的给体材料的能级示意图 Figure 6 Energy level diagram of donor materials based on the BDT or its derivatives with flexible side-chains 表 1 基于柔性侧链取代的 BDT 单元或其衍生物构筑的给体材料的电化学性质及相应的有机太阳能电池器件性能指标 Table 1 The electrochemical properties of donor materials based on the BDT or its derivatives with flexible side-chains and the photovoltaic characteristics of the corresponding solar cells [21] ITIC 0.85 12.5 39.9 4.26 [25] ITIC-Th1 0.75 11.8 35.8 3.16 [26] PBnDT-FTAZ 2.00 -5.…”

Section: 有机太阳能工作机理unclassified

Research Advances on Benzotriazole-based Organic Photovoltaic Materials

Bai¹,

Xue²,

Wang³

et al. 2021

Acta Chimica Sinica

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Over the past two decades, organic solar cells (OSCs) have been developed rapidly with the power conversion efficiency rapidly rising from less than 5% to over 18%, which is mainly promoted by the development of various new donor and acceptor materials. As a typical electron-deficient penta-heterocycle, benzotriazoles (BTAs) derivates a variety of high-performance photovoltaic materials, including polymer donor, small-molecule donor materials, as well as non-fullerenes acceptor and polymer acceptor. Among them, the J series of polymer donors and Y series of non-fullerenes acceptors are typical examples, and thus are specially highlighted in this review. Meanwhile, molecular design strategies of those BTA-based photovoltaic materials have also been discussed. It shows that donor-acceptor (D-A) conjugated strategy is still the most efficient thus far, where A units is the BTA unit or its derivatives, and D units commonly used in BTA-based photovoltaic materials are benzodithiophene, benzodifuran, dithienosilole, indacenodithiophene, thiophene, etc. The D-A strategy is both applied for donor molecules (with the molecular structure of D-A, D-π-A-π, D-A-D-A-D, etc.), and for acceptor molecules (with the molecular structure of A-D-A, A-π-D-π-A, A-DAD-A, etc.). By adjusting their molecular structures and/or pairing of differential D and A units, various properties such as absorption band and energy levels of molecules, as well as the morphology and charge carrier mobilities in OSCs can be well controlled. Furthermore, through side-chain engineering, such as flexible side-chains (alkyl, alkoxy, alkylthiol, alkylsilyl, etc.), conjugated side-chains (substituted-thiophene or benzene, etc.), electron-withdrawing groups (F atoms, Cl atoms, dicyanomethylene, etc.), their photovoltaic properties can be further regulated. Here, this review focuses on the research progress on BTA-based photovoltaic materials and related molecular design strategies developed in recent years, and also presents perspective on its future development.

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Effect of Thieno[3,2-b]thiophene π-bridge on photovoltaic performance of a D-A copolymer of alkoxy-benzodithiophene-alt-fluoro-benzotriazole

Cited by 12 publications

References 30 publications

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

Conjugated D–π–A photovoltaic polymers containing thieno[3,2-b]thiophene π-bridge

Research Advances on Benzotriazole-based Organic Photovoltaic Materials

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