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DOI10.1039/c7ee01387f
Isolating and quantifying the impact of domain purity on the performance of bulk heterojunction solar cells
Huang W.; Gann E.; Chandrasekaran N.; Thomsen L.; Prasad S.K.K.; Hodgkiss J.M.; Kabra D.; Cheng Y.-B.; McNeill C.R.
发表日期2017
ISSN17545692
起始页码1843
结束页码1853
卷号10期号:8
英文摘要In solution-processed organic bulk heterojunction (BHJ) solar cells, the purity of the phase-separated domains is known to play an important role in determining device function. While the effects of domain purity have been investigated by tuning of the BHJ morphology, such tuning typically results in several parameters (for example domain size and crystallinity) being varied at once. Here we show that by varying the time between spin-coating and the application of an anti-solvent treatment, the domain purity of the polymer-rich phase in PBDTTT-EFT:PC71BM blends can be tuned while keeping other morphological parameters constant. This unique approach enables the effect of domain purity on device function to be isolated and quantified. Over the purity range explored, solar cell power conversion efficiency is observed to monotonically increase from 7.2% to 9.6% with increasing domain purity, with the cell fill factor most affected by changes in domain purity. Employing transient photovoltage measurements we find that purer phases result in a reduction in the rate constant of bimolecular recombination. A more thorough treatment is also presented on the relationship between the total scattering intensity (derived from resonant soft X-ray scattering measurements) and domain purity. In particular it is shown that domain purity does not scale linearly with total scattering intensity requiring an initial estimate of absolute domain composition. © The Royal Society of Chemistry 2017.
英文关键词Heterojunctions; Polymer blends; Rate constants; X ray scattering; Bimolecular recombination; Bulk heterojunction solar cells; Domain composition; Initial estimate; Morphological parameters; Organic bulk heterojunctions; Solution-processed; Transient photovoltage measurements; Solar cells
语种英语
来源期刊Energy & Environmental Science
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/190437
作者单位Department of Materials Science and Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia; Australian Synchrotron, 800 Blackburn Road, Clayton, VIC 3168, Australia; IITB-Monash Research Academy, IIT Bombay, Mumbai, 400076, India; Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India; MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6140, New Zealand; Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, United States
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Huang W.,Gann E.,Chandrasekaran N.,et al. Isolating and quantifying the impact of domain purity on the performance of bulk heterojunction solar cells[J],2017,10(8).
APA Huang W..,Gann E..,Chandrasekaran N..,Thomsen L..,Prasad S.K.K..,...&McNeill C.R..(2017).Isolating and quantifying the impact of domain purity on the performance of bulk heterojunction solar cells.Energy & Environmental Science,10(8).
MLA Huang W.,et al."Isolating and quantifying the impact of domain purity on the performance of bulk heterojunction solar cells".Energy & Environmental Science 10.8(2017).
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