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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：供体材料的骨架结构和器件加工条件对小分子BHJSCs光伏性能的影响

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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：合成了小分子供体材料ICT18，ICT19和ICT20，以探索供体材料结构/骨架长度以及中央供体部分的性质对其热，光学，电子和光伏性质的影响。与ICT18（ε，0.83 x 10（5）mol（-1）cm（-1））相比，ICT19（2.26 x 10（5）me（-1）cm（-1））具有更高的光收集能力，表明更高的共轭长度对于产生更好的激子至关重要，并通过用ICT20的DTP单元（2.50 x 10（5）mol（-1）cm（-1））代替ICT19的BDT单元来进一步增强。这些材料的热稳定性得到增强，并且其共轭长度增加，其HOMO含量不稳定。使用这些材料作为供体，PC71BM作为受体来制造BHJSC。在优化条件下，拥有ICT18，ICT19和ICT20捐助者的BHJSC的PCE分别为5.69％，6.92和8.13％。具有大共轭长度和对称A-D-1-D-2-D-1-A结构的ICT19和ICT20与具有低共轭长度和非对称D-2-D-1-A结构的ICT18相比显示出更高的空穴电导率。进行光瞬态实验以了解合成材料的激发态动力学。 PCE的增强归因于活性层具有更高的光捕获能力，并且在供体-受体界面处具有高效，平衡的电荷传输和有效的激子离解。

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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;骨架结构;共轭长度;光电性能;

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