High-Efficiency Thickness-Insensitive Organic Solar Cells with an Insulating Polymer
Autor: | Heyuan Liu, Xiangyang Wang, Tong Wang, Meng-Si Niu, Jianqiang Liu, Xiyou Li, Chaochao Qin, Xiaotao Hao, Zhi-Nan Jiang, Hang Yin, Zhenchuan Wen |
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Rok vydání: | 2021 |
Předmět: |
Polypropylene
chemistry.chemical_classification Range (particle radiation) Materials science Organic solar cell business.industry Charge (physics) 02 engineering and technology Trapping Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polymer solar cell 0104 chemical sciences chemistry.chemical_compound chemistry Optoelectronics Molecule General Materials Science 0210 nano-technology business |
Zdroj: | ACS applied materialsinterfaces. 13(9) |
ISSN: | 1944-8252 |
Popis: | Achieving high-efficiency thick-film bulk heterojunction (BHJ) organic solar cells (OSCs) with thickness-independent power conversion efficiencies (PCEs) in a wide thickness range is still a challenge for the roll-to-roll printing techniques. The concept of diluting the transport sites within BHJ films with insulating polymers can effectively eliminate charge trapping states and optimize the charge transport. Herein, we first adopted the concept with insulating polypropylene (PP) in the efficient non-fullerene system (PM6:Y6) and demonstrated its potential to fabricate thick-film OSCs. The PP can form an insulating matrix prior to PM6 and Y6 within the BHJ film, resulting in an enhanced molecular interaction and isolated charge transport by expelling Y6 molecules. We thus observed reduced trap state density and improved charge transport properties in the PP-blended device. At around 300 nm, the PM6:Y6:PP device enjoys a high PCE of 15.5% and achieves over 100% of the efficiency of the optimal thin-film device, which is significantly improved compared to the binary PM6:Y6 counterpart. This research promotes an effective strategy with insulating polymers and provides knowledge of commercial production with response to the roll-to-roll technique demands. |
Databáze: | OpenAIRE |
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