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首页> 外文期刊>Energy & environmental science >Optimisation of processing solvent and molecular weight for the production of green-solvent-processed all-polymer solar cells with a power conversion efficiency over 9%
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Optimisation of processing solvent and molecular weight for the production of green-solvent-processed all-polymer solar cells with a power conversion efficiency over 9%

机译：优化用于生产绿色溶剂处理的全聚合物太阳能电池的加工溶剂和分子量，功率转换效率超过9％

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摘要

Increasing interest has been devoted to developing high-performance all-polymer solar cells (all-PSCs) owing to their specific advantages in light absorption and long-term stability. In this work, we systematically investigated the synergistic effects of processing solvents and molecular weight on the photovoltaic performance of all-PSCs, which consist of an n-type polymer N2200 and a p-type wide bandgap polymer PTzBI that are made up of benzodithiophene and imide-functionalized benzotriazole units. It is noted that increasing the molecular weight of N2200 can simultaneously enhance exciton generation and dissociation, reduce bimolecular recombination, and facilitate charge extraction. The films processed with the environmentally-friendly solvent 2-methyl-tetrahydrofuran (MeTHF) exhibit a more favourable film morphology than those processed with commonly used halogenated solvents. The all-PSC consisting of the high molecular weight N2200 and PTzBI processed with the environmentally friendly solvent MeTHF presents a remarkable power conversion efficiency of 9.16%, which is the highest value so far observed for all-PSCs. Of particular interest is that the PCE remains 6.37% with the active layer thickness of 230 nm. These observations imply the great promise of the developed all-PSCs for practical applications toward high-throughput roll-to-roll technology.
机译：由于其在光吸收和长期稳定性方面的特殊优势，人们对开发高性能全聚合物太阳能电池（all-PSC）的兴趣日益浓厚。在这项工作中，我们系统地研究了加工溶剂和分子量对全PSC光伏性能的协同效应，全PSC由n型聚合物N2200和p型宽带隙聚合物PTzBI组成，后者由苯并二噻吩和酰亚胺官能化的苯并三唑单元。注意，增加N2200的分子量可以同时增强激子的产生和离解，减少双分子的重组，并促进电荷提取。用环保溶剂2-甲基-四氢呋喃（MeTHF）处理过的薄膜比用常用卤化溶剂处理过的薄膜具有更好的薄膜形态。由高分子量N2200和PTzBI组成的全PSC经环保溶剂MeTHF处理后，功率转换效率高达9.16％，这是迄今为止所有PSC观察到的最高值。特别令人感兴趣的是PCE保持6.37％，且有源层厚度为230 nm。这些观察结果表明，已开发出的全PSC在面向高通量卷对卷技术的实际应用中具有广阔的前景。

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  • 来源
    《Energy & environmental science》 |2017年第5期|1243-1251|共9页
  • 作者

    Fan Baobing; Ying Lei; Wang Zhenfeng; He Baitian; Jiang Xiao-Fang; Huang Fei; Cao Yong;

  • 作者单位

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

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