Effect of electron-withdrawing fluorine and cyano substituents on photovoltaic properties of two-dimensional quinoxaline-based polymers

AbstractIn this study, strong electron-withdrawing fluorine (F) and cyano (CN) substituents are selectively incorporated into the quinoxaline unit of two-dimensional (2D) D–A-type polymers to investigate their effects on the photovoltaic properties of the polymers. To construct the 2D polymeric structure, electron-donating benzodithiophene and methoxy-substituted triphenylamine are directly linked to the horizontal and vertical directions of the quinoxaline acceptor, respectively. After analyzing the structural, optical, and electrochemical properties of the resultant F- and CN-substituted polymers, labeled as PBCl-MTQF and PBCl-MTQCN, respectively, inverted-type polymer solar cells with a non-fullerene Y6 acceptor are fabricated to investigate the photovoltaic performances of the polymers. It is discovered that the maximum power conversion efficiency of PBCl-MTQF is 7.48%, whereas that of PBCl-MTQCN is limited to 3.52%. This significantly reduced PCE of the device based on PBCl-MTQCN is ascribed to the formation of irregular, large aggregates in the active layer, which can readily aggravate the charge recombination and charge transport kinetics of the device. Therefore, the photovoltaic performance of 2D quinoxaline-based D–A-type polymers is significantly affected by the type of electron-withdrawing substituent.

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Effect of Electron-Withdrawing Fluorine and Cyano Substituents on Photovoltaic Properties of Two-Dimensional Quinoxaline-Based Polymers

10.21203/rs.3.rs-957213/v1 ◽

2021 ◽

Author(s):

Seok Woo Lee ◽

MD Waseem Hussain ◽

Sanchari Shome ◽

Su Ryong Ha ◽

Jae Taek Oh ◽

...

Keyword(s):

Solar Cells ◽

Charge Transport ◽

Electrochemical Properties ◽

Polymer Solar Cells ◽

Power Conversion ◽

Photovoltaic Performance ◽

Two Dimensional ◽

Strong Electron ◽

Photovoltaic Properties ◽

Kinetics Of

Abstract In this study, strong electron-withdrawing fluorine (F) and cyano (CN) substituents are selectively incorporated into the quinoxaline unit of two-dimensional (2D) D–A-type polymers to investigate their effects on the photovoltaic properties of the polymers. To construct the 2D polymeric structure, electron-donating benzodithiophene and methoxy-substituted triphenylamine are directly linked to the horizontal and vertical directions of the quinoxaline acceptor, respectively. After analyzing the structural, optical, and electrochemical properties of the resultant F- and CN-substituted polymers, labeled as PBCl-MTQF and PBCl-MTQCN, respectively, inverted-type polymer solar cells with a non-fullerene Y6 acceptor are fabricated to investigate the photovoltaic performances of the polymers. It is discovered that the maximum power conversion efficiency of PBCl-MTQF is 7.48%, whereas that of PBCl-MTQCN is limited to 3.10%. This significantly reduced PCE of the device based on PBCl-MTQCN is ascribed to the formation of irregular, large aggregates in the active layer, which can readily aggravate the charge recombination and charge transport kinetics of the device. Therefore, the photovoltaic performance of 2D quinoxaline-based D–A-type polymers is significantly affected by the type of electron-withdrawing substituent.

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Non-toxic green food additive enables efficient polymer solar cells through adjusting the phase composition distribution and boosting charge transport

Journal of Materials Chemistry C ◽

10.1039/c9tc06571g ◽

2020 ◽

Vol 8 (7) ◽

pp. 2483-2490 ◽

Cited By ~ 16

Author(s):

Jianfeng Li ◽

Yufei Wang ◽

Zezhou Liang ◽

Jicheng Qin ◽

Meiling Ren ◽

...

Keyword(s):

Solar Cells ◽

Phase Composition ◽

Charge Transport ◽

Polymer Solar Cells ◽

Photovoltaic Performance ◽

Food Additive ◽

Composition Distribution ◽

Photoactive Layer ◽

Green Food

Solvent additives play an important role in optimizing the morphology of the photoactive layer and improving the photovoltaic performance of polymer solar cells (PSCs).

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Elucidating the impact of molecular weight on morphology, charge transport, photophysics and performance of all-polymer solar cells

Journal of Materials Chemistry A ◽

10.1039/d0ta08195g ◽

2020 ◽

Vol 8 (40) ◽

pp. 21070-21083 ◽

Cited By ~ 1

Author(s):

Duyen K. Tran ◽

Amélie Robitaille ◽

I. Jo Hai ◽

Xiaomei Ding ◽

Daiki Kuzuhara ◽

...

Keyword(s):

Molecular Weight ◽

Solar Cells ◽

Charge Transport ◽

Polymer Solar Cells ◽

Polymer Molecular Weight ◽

Photovoltaic Properties ◽

Blend Morphology ◽

And Performance ◽

The Impact

This work provides a unified understanding on how polymer molecular weight influences the blend photophysics, blend morphology, charge transport, and photovoltaic properties of all-polymer solar cells.

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Novel donor–acceptor polymers containing o-fluoro-p-alkoxyphenyl-substituted benzo[1,2-b:4,5-b′]dithiophene units for polymer solar cells with power conversion efficiency exceeding 9%

Journal of Materials Chemistry A ◽

10.1039/c6ta03709g ◽

2016 ◽

Vol 4 (26) ◽

pp. 10212-10222 ◽

Cited By ~ 46

Author(s):

Ning Wang ◽

Weichao Chen ◽

Wenfei Shen ◽

Linrui Duan ◽

Meng Qiu ◽

...

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Polymer Solar Cells ◽

Power Conversion ◽

Two Dimensional ◽

Donor Acceptor ◽

Additive Treatment

A PCE of 9.02% for a two-dimensional polymer as donor applied in solar cells was obtained without any additive treatment.

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Synthesis and photovoltaic properties of dithieno[3,2-b:2′,3′-d]silole-based conjugated copolymers

Journal of Materials Chemistry A ◽

10.1039/c5ta01523e ◽

2015 ◽

Vol 3 (26) ◽

pp. 13794-13800 ◽

Cited By ~ 14

Author(s):

Shanpeng Wen ◽

Chen Wang ◽

Pengfei Ma ◽

Ying-Xuan Zhao ◽

Chang Li ◽

...

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Polymer Solar Cells ◽

Power Conversion ◽

Photovoltaic Properties ◽

Conjugated Copolymers

Efficient polymer solar cells were fabricated by blending PDTS-DTffBT with PC71BM, and the power conversion efficiency reached 5.26%.

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Effect of π-Conjugated Spacer in N-Alkylphenoxazine-Based Sensitizers Containing Double Anchors for Dye-Sensitized Solar Cells

Polymers ◽

10.3390/polym13081304 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1304

Author(s):

Yung-Sheng Yen ◽

Velu Indumathi

Keyword(s):

Solar Cells ◽

Electrochemical Impedance ◽

Power Conversion ◽

Photovoltaic Performance ◽

Co Adsorption ◽

Dye Sensitized Solar Cells ◽

Photovoltaic Properties ◽

Dye Sensitized ◽

The Impact ◽

Sensitized Solar Cells

A series of novel double-anchoring dyes for phenoxazine-based organic dyes with two 2-cyanoacetic acid acceptors/anchors, and the inclusion of a 2-ethylhexyl chain at the nitrogen atom of the phenoxazine that is connected with furan, thiophene, and 3-hexylthiophene as a linker, are used as sensitizers for dye-sensitized solar cells. The double-anchoring dye exhibits strong electronic coupling with TiO2, provided that there is an efficient charge injection rate. The result showed that the power conversion efficiency of DP-2 with thiophene linker-based cell reached 3.80% higher than that of DP-1 with furan linker (η = 1.53%) under standard illumination. The photovoltaic properties are further tuned by co-adsorption strategy, which improved power conversion efficiencies slightly. Further molecular theoretical computation and electrochemical impedance spectroscopy analysis of the dyes provide further insight into the molecular geometry and the impact of the different π-conjugated spacers on the photophysical and photovoltaic performance.

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Binary organic spacer-based quasi-two-dimensional perovskites with preferable vertical orientation and efficient charge transport for high-performance planar solar cells

Journal of Materials Chemistry A ◽

10.1039/c8ta12476k ◽

2019 ◽

Vol 7 (16) ◽

pp. 9542-9549 ◽

Cited By ~ 17

Author(s):

Shi Chen ◽

Nan Shen ◽

Luozheng Zhang ◽

Weiguang Kong ◽

Lihua Zhang ◽

...

Keyword(s):

Solar Cells ◽

Charge Transport ◽

Power Conversion Efficiency ◽

High Power ◽

High Performance ◽

Power Conversion ◽

Two Dimensional ◽

High Power Conversion Efficiency ◽

Vertical Orientation ◽

Efficient Charge

The (PEA0.8BA0.2)2MA3Pb4I13 binary spacer Q-2D perovskite device yields a high power conversion efficiency of 15.7%.

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Synthesis and photovoltaic properties of two-dimensional benzodithiophene-thiophene copolymers with pendent rational naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole side chains

Journal of Materials Chemistry A ◽

10.1039/c5ta07205k ◽

2015 ◽

Vol 3 (46) ◽

pp. 23149-23161 ◽

Cited By ~ 27

Author(s):

Xiaopeng Xu ◽

Kui Feng ◽

Kai Li ◽

Qiang Peng

Keyword(s):

Solar Cells ◽

High Performance ◽

Molecular Design ◽

Polymer Solar Cells ◽

Side Chains ◽

Two Dimensional ◽

Photovoltaic Properties ◽

Solvent Vapour ◽

Rational Molecular Design ◽

Annealing Method

Rational molecular design of the conjugated side chains and the solvent vapour annealing method were employed in this work to develop high performance two-dimensional copolymer donors and their efficient polymer solar cells.

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Enhanced Power Conversion Efficiency of P3HT : PC71BM Bulk Heterojunction Polymer Solar Cells by Doping a High-Mobility Small Organic Molecule

International Journal of Photoenergy ◽

10.1155/2015/982064 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 6

Author(s):

Hanyu Wang ◽

Xiao Wang ◽

Pu Fan ◽

Xin Yang ◽

Junsheng Yu

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Polymer Solar Cells ◽

Short Circuit ◽

Power Conversion ◽

Photovoltaic Performance ◽

Acid Methyl Ester ◽

High Mobility ◽

Short Circuit Current

The effect of molecular doping with TIPS-pentacene on the photovoltaic performance of polymer solar cells (PSCs) with a structure of ITO/ZnO/poly(3-hexylthiophene-2,5-diyl) (P3HT) : [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) : TIPS-pentacene/MoOx/Ag was systematically investigated by adjusting TIPS-pentacene doping ratios ranged from 0.3 to 1.2 wt%. The device with 0.6 wt% TIPS-pentacene exhibited the enhanced short-circuit current and fill factor by 1.23 mA/cm2and 7.8%, respectively, resulting in a maximum power conversion efficiency of 4.13%, which is one-third higher than that of the undoped one. The photovoltaic performance improvement was mainly due to the balanced charge carrier mobility, enhanced crystallinity, and matched cascade energy level alignment in TIPS-pentacene doped active layer, resulting in the efficient charge separation, transport, and collection.

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