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首页> 外文期刊>Advanced energy materials >Significant Effect of Fluorination on Simultaneously Improving Work Function and Transparency of Anode Interlayer for Organic Solar Cells
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Significant Effect of Fluorination on Simultaneously Improving Work Function and Transparency of Anode Interlayer for Organic Solar Cells

机译：氟化对同时提高有机太阳能电池阳极夹层的工作功能和透明度的显著作用

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摘要

Since the highest occupied molecular orbital (HOMO) level of donors in organic solar cells (OSCs) is being constantly downshifted for achieving high open-circuit voltage (V-oc), a further enhancement of the anode work function (WF) is required. Herein, an effective approach of fluorination is demonstrated to simultaneously improve the WF and transparency for anode interlayer (AIL) material. By fluorination, in combination with the dialysis treatment in LiCl solution, the WF of PCP-2F-Li could be significantly enhanced from 4.86 to 5.0 eV, as compared to PCP-Na. Meanwhile, the transparency of the polymer is also improved. As a result, PCP-2F-Li can be used to modify efficient active layers consisting of polymer donors with deep HOMO levels, such as PBDB-T-2F:IT-4F, and an outstanding power conversion efficiency (PCE) of 12.7% is achieved in the corresponding device with a high V-oc of 0.84 V. This result represents the highest efficiency for the OSCs using a solution-processed pH-neutral AIL, which is beneficial to the low-cost fabrication of high-performance OSCs with improved stability. More importantly, PCP-2F-Li could be processed by blade coating for making large-area device of 1 cm(2), and a PCE of 10.6% is achieved, bringing a promising prospect for the large-area device fabrication.
机译：由于有机太阳能电池（OSC）中施主的最高占据分子轨道（HOMO）水平不断降低，以实现高开路电压（V-oc），因此需要进一步提高阳极功函数（WF）。本文中，证明了有效的氟化方法可同时提高阳极夹层（AIL）材料的WF和透明度。通过氟化，与在LiCl溶液中进行透析处理相结合，与PCP-Na相比，PCP-2F-Li的WF可从4.86显着提高至5.0 eV。同时，聚合物的透明度也得到改善。结果，PCP-2F-Li可用于修饰高效活性层，该活性层由具有高HOMO水平的聚合物供体组成，例如PBDB-T-2F：IT-4F，且具有12.7％的出色功率转换效率（PCE）在具有0.84 V的高V-oc的相应设备中实现了这一点。此结果代表使用溶液处理的pH中性AIL的OSC的最高效率，这有利于低成本制造高性能OSC，且成本低廉。提高了稳定性。更重要的是，PCP-2F-Li可以通过叶片涂层进行处理，以制造1 cm（2）的大面积器件，并且PCE达到10.6％，为大面积器件制造带来广阔的前景。

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  • 来源
    《Advanced energy materials》 |2019年第15期|1803826.1-1803826.7|共7页
  • 作者

    Lu Lili; Liao Qing; Zu Yunfei; Xu Ye; Xu Bowei; Hou Jianhui;

  • 作者单位

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    blade coating; fluorination; large-area devices; transmittance; work function;

    机译：叶片涂层;氟化;大面积器件;透射率;功函数;

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