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首页> 外文期刊>Advanced energy materials >Influence of Fullerene Acceptor on the Performance, Microstructure, and Photophysics of Low Bandgap Polymer Solar Cells
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Influence of Fullerene Acceptor on the Performance, Microstructure, and Photophysics of Low Bandgap Polymer Solar Cells

机译：富勒烯受体对低带隙聚合物太阳能电池性能，微结构和光物理的影响

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摘要

The morphology, photophysics, and device performance of solar cells based on the low bandgap polymer poly[[2,6'-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene]3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl (PBDTTT-EFT) (also known as PTB7-Th) blended with different fullerene acceptors: Phenyl-C-61-butyric acid methyl ester (PC61BM), phenyl-C-71-butyric acid methyl ester (PC71BM), or indene-C-60 bisadduct (ICBA) are correlated. Compared to PC71BM-based cells-which achieve a power conversion efficiency (PCE) of 9.4%-cells using ICBA achieve a higher open-circuit voltage (V-OC) of 1.0 V albeit with a lower PCE of 7.1%. To understand the origin of this lower PCE, the morphology and photophysics have been thoroughly characterized. Hard and soft X-ray scattering measurements reveal that the PBDTTT-EFT: ICBA blend has a lower crystallinity, lower domain purity, and smaller domain size compared to the PBDTTT-EFT: PC71BM blend. Incomplete photoluminescence quenching is also found in the ICBA blend with transient absorption measurements showing faster recombination dynamics at short timescales. Transient photovoltage measurements highlight further differences in recombination at longer timeframes due to the more intermixed morphology of the ICBA blend. Interestingly, a mild thermal treatment improves the performance of PBDTTT-EFT: ICBA cells which is exploited in the fabrication of a homo PBDTTT-EFT: ICBA tandem solar cell with PCE of 9.0% and V-OC of 1.93 V.
机译：基于低带隙聚合物聚[[2,6'-4,8-​​二（5-乙基己基噻吩基）苯并[1,2-b; 3,3-b]二噻吩]的太阳能电池的形貌，光物理性质和器件性能与不同的富勒烯受体混合的] 3-氟-2 [（2-乙基己基）羰基]噻吩并[3,4-b]噻吩二基（PBDTTT-EFT）（也称为PTB7-Th）：苯基-C-61-丁酸甲基（PC61BM），苯基-C-71-丁酸甲酯（PC71BM）或茚-C-60双加合物（ICBA）相关联。与基于PC71BM的电池（其功率转换效率（PCE）为9.4％）相比，使用ICBA的电池可实现1.0 V的较高开路电压（V-OC），尽管PCE较低，为7.1％。为了了解这种较低的PCE的起源，对形态和光物理特性进行了彻底的表征。硬X射线散射和软X射线散射测量表明，与PBDTTT-EFT：PC71BM混合物相比，PBDTTT-EFT：ICBA混合物具有较低的结晶度，较低的畴纯度和较小的畴尺寸。在ICBA共混物中还发现不完全的光致发光猝灭，瞬态吸收测量表明在短时间范围内重组动力学更快。瞬态光电压测量结果显示，由于ICBA共混物的形态更加混杂，因此在更长的时间范围内重组的进一步差异。有趣的是，温和的热处理可以改善PBDTTT-EFT：ICBA电池的性能，该电池被用于制造PBDTTT-EFT：ICBA串联太阳能电池，PCE为9.0％，V-OC为1.93 V.

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  • 来源
    《Advanced energy materials》 |2017年第11期|1602197.1-1602197.10|共10页
  • 作者

    Huang Wenchao; Gann Eliot; Chandrasekaran Naresh; Prasad Shyamal K. K.; Chang Sheng-Yung; Thomsen Lars; Kabra Dinesh; Hodgkiss Justin M.; Cheng Yi-Bing; Yang Yang; McNeill Christopher R.;

  • 作者单位

    Monash Univ, Dept Mat Sci & Engn, Wellington Rd, Clayton, Vic 3800, Australia|Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA|Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA;

    Monash Univ, Dept Mat Sci & Engn, Wellington Rd, Clayton, Vic 3800, Australia|Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia;

    Monash Univ, Dept Mat Sci & Engn, Wellington Rd, Clayton, Vic 3800, Australia|Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India|Indian Inst Technol, IITB Monash Res Acad, Bombay 400076, Maharashtra, India;

    Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6012, New Zealand;

    Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA;

    Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia;

    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India;

    Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6012, New Zealand;

    Monash Univ, Dept Mat Sci & Engn, Wellington Rd, Clayton, Vic 3800, Australia;

    Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA|Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA;

    Monash Univ, Dept Mat Sci & Engn, Wellington Rd, Clayton, Vic 3800, Australia;

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