scholarly journals Random terpolymer based on thiophene-thiazolothiazole unit enabling efficient non-fullerene organic solar cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jingnan Wu ◽  
Guangwei Li ◽  
Jin Fang ◽  
Xia Guo ◽  
Lei Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Temperature Dependent ◽  
Polymer Backbone ◽  
Positive Effects ◽  
Highly Sensitive ◽  
Aggregation Property ◽  
Reduced Temperature

Abstract Developing a high-performance donor polymer is critical for achieving efficient non-fullerene organic solar cells (OSCs). Currently, most high-efficiency OSCs are based on a donor polymer named PM6, unfortunately, whose performance is highly sensitive to its molecular weight and thus has significant batch-to-batch variations. Here we report a donor polymer (named PM1) based on a random ternary polymerization strategy that enables highly efficient non-fullerene OSCs with efficiencies reaching 17.6%. Importantly, the PM1 polymer exhibits excellent batch-to-batch reproducibility. By including 20% of a weak electron-withdrawing thiophene-thiazolothiazole (TTz) into the PM6 polymer backbone, the resulting polymer (PM1) can maintain the positive effects (such as downshifted energy level and reduced miscibility) while minimize the negative ones (including reduced temperature-dependent aggregation property). With higher performance and greater synthesis reproducibility, the PM1 polymer has the promise to become the work-horse material for the non-fullerene OSC community.

Understanding the influence of carboxylate substitution on the property of high-performance donor polymers in non-fullerene organic solar cells

2018 ◽  
Vol 2 (7) ◽  
pp. 1360-1365 ◽  
Author(s):  
Guofang Yang ◽  
Jing Liu ◽  
Lik-Kuen Ma ◽  
Shangshang Chen ◽  
Joshua Yuk Lin Lai ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Temperature Dependent ◽  
Alkyl Chains ◽  
Aggregation Property

Carboxylate substitution can enhance crystallinity and introduce purer domains; alkyl chains provide a temperature-dependent aggregation property.

scholarly journals Solution-Processed Transparent Conducting Electrodes for Flexible Organic Solar Cells with 16.61% Efficiency

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Juanyong Wan ◽  
Yonggao Xia ◽  
Junfeng Fang ◽  
Zhiguo Zhang ◽  
Bingang Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Electrical Stability ◽  
Solution Processed ◽  
Good Thermal Stability ◽  
Transparent Conducting ◽  
High Flexibility

AbstractNonfullerene organic solar cells (OSCs) have achieved breakthrough with pushing the efficiency exceeding 17%. While this shed light on OSC commercialization, high-performance flexible OSCs should be pursued through solution manufacturing. Herein, we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid (CF3SO3H). Through a low-concentration and low-temperature CF3SO3H doping, the conducting polymer anodes exhibited a main sheet resistance of 35 Ω sq−1 (minimum value: 32 Ω sq−1), a raised work function (≈ 5.0 eV), a superior wettability, and a high electrical stability. The high work function minimized the energy level mismatch among the anodes, hole-transporting layers and electron-donors of the active layers, thereby leading to an enhanced carrier extraction. The solution-processed flexible OSCs yielded a record-high efficiency of 16.41% (maximum value: 16.61%). Besides, the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85 °C, demonstrating a high flexibility and a good thermal stability.

Theoretical design of three-dimensional non-fullerene acceptor materials based on an arylenediimide unit towards high efficiency organic solar cells

2017 ◽  
Vol 41 (10) ◽  
pp. 3857-3864 ◽  
Author(s):  
Qing-Qing Pan ◽  
Shuang-Bao Li ◽  
Yong Wu ◽  
Ji Zhang ◽  
Hai-Bin Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Three Dimensional ◽  
Tddft Calculations ◽  
Theoretical Design ◽  
Organic Acceptor ◽  
Dft And Tddft Calculations

DFT and TDDFT calculations were performed to search for high-performance non-fullerene organic acceptor materials in organic solar cells.

scholarly journals All-small-molecule organic solar cells with over 14% efficiency by optimizing hierarchical morphologies

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ruimin Zhou ◽  
Zhaoyan Jiang ◽  
Chen Yang ◽  
Jianwei Yu ◽  
Jirui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Photovoltaic System ◽  
Active Layers ◽  
Donor Acceptor

AbstractThe high efficiency all-small-molecule organic solar cells (OSCs) normally require optimized morphology in their bulk heterojunction active layers. Herein, a small-molecule donor is designed and synthesized, and single-crystal structural analyses reveal its explicit molecular planarity and compact intermolecular packing. A promising narrow bandgap small-molecule with absorption edge of more than 930 nm along with our home-designed small molecule is selected as electron acceptors. To the best of our knowledge, the binary all-small-molecule OSCs achieve the highest efficiency of 14.34% by optimizing their hierarchical morphologies, in which the donor or acceptor rich domains with size up to ca. 70 nm, and the donor crystals of tens of nanometers, together with the donor-acceptor blending, are proved coexisting in the hierarchical large domain. All-small-molecule photovoltaic system shows its promising for high performance OSCs, and our study is likely to lead to insights in relations between bulk heterojunction structure and photovoltaic performance.

An effective π-extended squaraine for solution-processed organic solar cells with high efficiency

2016 ◽  
Vol 4 (48) ◽  
pp. 18931-18941 ◽  
Author(s):  
Daobin Yang ◽  
Hisahiro Sasabe ◽  
Yan Jiao ◽  
Taojun Zhuang ◽  
Yan Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Hole Mobility ◽  
Solution Processed ◽  
Photovoltaic Materials

A π-extension strategy is an effective way for squaraines for achieving high-performance photovoltaic materials capable of showing much enhanced hole mobility.

2-Dimensional cross-shaped tetrathienonaphthalene-based ladder-type acceptor for high-efficiency organic solar cells

2020 ◽  
Vol 8 (24) ◽  
pp. 12141-12148 ◽  
Author(s):  
Shao-Ling Chang ◽  
Fong-Yi Cao ◽  
Kuo-Hsiu Huang ◽  
Wei-Liang Lee ◽  
Meng-Hsun Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Ternary Blend

Development of 2-dimensional cross-shaped ladder-type TC is promising for achieving high-performance n-type materials and the device using PBDB-T:TC-FIC:PC71BM ternary blend achieves a high efficiency of 13.5%.

Forced coplanarity of dithienofluorene-based non-fullerene acceptors to achieve high-efficiency organic solar cells

2019 ◽  
Vol 7 (30) ◽  
pp. 17947-17953 ◽  
Author(s):  
Fong-Yi Cao ◽  
Po-Kai Huang ◽  
Yen-Chen Su ◽  
Wen-Chia Huang ◽  
Shao-Ling Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Ternary Blend

This work clearly demonstrates the importance of chemical planarization in designing high-performance nonfullerene acceptors and the ternary-blend device using PBDB-T:DTFT9-FIC:PC71BM achieved a high PCE of 11.82%.

Asymmetric selenophene-based non-fullerene acceptors for high-performance organic solar cells

2019 ◽  
Vol 7 (4) ◽  
pp. 1435-1441 ◽  
Author(s):  
Chao Li ◽  
Tian Xia ◽  
Jiali Song ◽  
Huiting Fu ◽  
Hwa Sook Ryu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Fill Factor ◽  
High Efficiency ◽  
Building Blocks

Two novel selenophene-containing building blocks have been developed as central cores to construct high-performance asymmetric non-fullerene acceptors (SePTT-2F and SePTTT-2F). Organic solar cells based on SePTTT-2F with more extended backbone conjugation delivered a high efficiency of 12.24% with an outstanding fill factor of 75.9%.

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