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首页> 外文期刊>Solar Energy >Influence of the backbone structure of the donor material and device processing conditions on the photovoltaic properties of small molecular BHJSCs
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Influence of the backbone structure of the donor material and device processing conditions on the photovoltaic properties of small molecular BHJSCs

机译：供体材料的骨干结构的影响和装置加工条件对小分子BHJSCs的光伏性能

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摘要

Small molecule donor materials, ICT18, ICT19 and ICT20 are synthesized to explore the effect of donor material architecture/backbone length and nature of central donor moiety on their thermal, optical, electronic and photovoltaic properties. Compared to ICT18 (epsilon, 0.83 x 10(5) mol(-1) cm(-1)), ICT19 (2.26 x 10(5) me(-1) cm(-1)) has higher light harvesting ability indicating that higher conjugation length is essential for better exciton generation and is further enhanced by replacing the BDT unit of ICT19 with DTP unit of ICT20 (2.50 x 10(5) mol(-1) cm(-1)). Thermal stability of these materials is enhanced and their HOMO level is destabilized with an increase in their conjugation length. BHJSCs are fabricated using these materials as donor and PC71BM as acceptors. Under the optimized conditions, BHJSCs with ICT18, ICT19 and ICT20 donors show PCE of 5.69, 6.92 and 8.13%, respectively. ICT19 and ICT20 with large conjugation length and symmetrical A-D-1-D-2-D-1-A architecture show higher hole conductivity over ICT18 with low conjugation length and unsymmetrical D-2-D-1-A structure. Photo transient experiments are performed to understand the excited state dynamics of the synthesized materials. The enhancement in the PCE is due to higher light harvesting ability of the active layer with efficient and balanced charge transport and effective exciton dissociation at the donor-acceptor interface.
机译：合成小分子供体材料，ICT18，ICT19和ICT20，以探讨供体材料架构/骨干长度和中枢供体部分的骨干长度与其热，光学，电子和光伏性能的影响。与ICT18相比（ε，0.83×10（5）mol（-1）cm（-1）），ICT19（2.26×10（5）mE（-1）cm（-1））具有较高的光收获能力，表明更高的共轭长度对于更好的激子生成至关重要，并且通过用ICT20的DTP单元替换ICT19的BDT单元进一步增强（2.50×10（5）摩尔（-1）cm（-1））。这些材料的热稳定性得到增强，并且它们的同性能水平不稳定，其共轭长度增加。使用这些材料作为供体和PC71BM作为受护者制造的BHJSC。在优化条件下，具有ICT18，ICT19和ICT20供体的BHJSC分别显示为5.69,6.92和8.13％的PCE。 ICT19和ICT20具有大的共轭长度和对称的A-D-1-D-2-D-1-A架构，架构在ICT18上显示出更高的孔电导率，具有低共轭长度和非对称的D-2-D-1-A结构。进行照片瞬态实验以了解合成材料的激发状态动态。 PCE中的增强是由于活性层具有更高的光收集能力，具有高效和平衡的电荷传输和在供体 - 受体界面处的有效激子解离。

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  • 来源
    《Solar Energy》 |2019年第7期|84-93|共10页
  • 作者

    Busireddy Manohar Reddy; Chakali Madhu; Reddy Gontu Ramanjaneya; Chereddy Narendra Reddy; Shanigaram Balaiah; Kotamarthi Bhanuprakash; Sharma Ganesh D.; Rao V. Jayathirtha;

  • 作者单位

    CSIR Indian Inst Chem Technol Crop Protect Chem Div Hyderabad 500007 Andhra Pradesh India|CSIR Indian Inst Chem Technol Catalysis & Fine Chem Div Hyderabad 500007 Andhra Pradesh India|CSIR Indian Inst Chem Technol AcSIR Hyderabad 500007 Andhra Pradesh India;

    CSIR Indian Inst Chem Technol Crop Protect Chem Div Hyderabad 500007 Andhra Pradesh India|CSIR Indian Inst Chem Technol AcSIR Hyderabad 500007 Andhra Pradesh India;

    CSIR Indian Inst Chem Technol Crop Protect Chem Div Hyderabad 500007 Andhra Pradesh India;

    CSIR Indian Inst Chem Technol Crop Protect Chem Div Hyderabad 500007 Andhra Pradesh India|CSIR Indian Inst Chem Technol AcSIR Hyderabad 500007 Andhra Pradesh India;

    CSIR Indian Inst Chem Technol Catalysis & Fine Chem Div Hyderabad 500007 Andhra Pradesh India;

    CSIR Indian Inst Chem Technol Catalysis & Fine Chem Div Hyderabad 500007 Andhra Pradesh India;

    LNM Inst Informat Technol Dept Phys Jaipur Rajasthan India;

    CSIR Indian Inst Chem Technol Crop Protect Chem Div Hyderabad 500007 Andhra Pradesh India|CSIR Indian Inst Chem Technol AcSIR Hyderabad 500007 Andhra Pradesh India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Organic BHJSCs; Small molecule donor materials; Backbone structure; Conjugation length; Opto-electronic Properties;

    机译：有机BHJSCS;小分子供体材料;骨干结构;共轭长度;光电性质;

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