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DOI	10.1039/c7ee01403a
	Suppressing photooxidation of conjugated polymers and their blends with fullerenes through nickel chelates
	Salvador M.; Gasparini N.; Perea J.D.; Paleti S.H.; Distler A.; Inasaridze L.N.; Troshin P.A.; Lüer L.; Egelhaaf H.-J.; Brabec C.
发表日期	2017
ISSN	17545692
起始页码	2005
结束页码	2016
卷号	10 期号:9
英文摘要	Conjugated polymer semiconductors offer unique advantages over conventional semiconductors but tend to suffer from electro-optic performance roll-off, mainly due to reduced photofastness. Here, we demonstrate that the commodity nickel chelate nickel(ii) dibutyldithiocarbamate, Ni(dtc)2, effectively inhibits photooxidation across a wide range of prototypical π-conjugated polymer semiconductors and blends. The addition of 2-10 wt% of Ni(dtc)2 increases the resilience of otherwise quickly photobleaching semiconducting thin films, even in the presence of detrimental, radical forming processing additives. Using electron spin resonance spectroscopy and sensitive oxygen probes, we found that Ni(dtc)2 acts as a broadband stabilizer that inhibits both the formation of reactive radicals and singlet oxygen. The mechanism of stabilization is of sacrificial nature, but contains non-sacrificial contributions in polymers where singlet oxygen is a key driver of photooxidation. Ultrafast pump-probe spectroscopy reveals quenching of triplet excited states as the central mechanism of non-sacrificial stabilization. When introduced into the active layer of organic photovoltaic devices, Ni(dtc)2 retards the short circuit current loss in air without affecting the sensitive morphology of bulk heterojunctions and without major sacrifices in semiconductor properties. Antioxidants based on nickel complexes thus constitute functional stabilizers for elucidating degradation mechanisms in organic semiconductors and represent a cost-effective route toward organic electronic appliances with extended longevity. © 2017 The Royal Society of Chemistry.
英文关键词	Chelation; Cost effectiveness; Degradation; Electron spin resonance spectroscopy; Heterojunctions; Magnetic moments; Nickel; Oxygen; Photobleaching; Photooxidation; Polymer blends; Probes; Semiconducting films; Semiconductor devices; Spectroscopy; Stabilization; Degradation mechanism; Electro-optic performance; Organic electronics; Organic photovoltaic devices; Polymer semiconductors; Semiconducting thin films; Semiconductor properties; Ultrafast pump-probe spectroscopy; Conjugated polymers; antioxidant; degradation; electron spin resonance; electronic equipment; equipment; inorganic compound; nickel; oxygen; performance assessment; photooxidation; photovoltaic system; polymer; stabilization
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/190427
作者单位	Friedrich-Alexander University Erlangen-Nuremberg, Germany; Instituto de Telecomunicações, Instituto Superior Técnico, Av. Rovisco Pais, Lisboa, P-1049-001, Portugal; ZAE Bayern, Erlangen, Germany; Skolkovo Institute of Science and Technology, Moscow, Russian Federation; IMDEA Nanoscience, C/Faraday 9, Cantoblanco (Madrid), 28049, Spain
推荐引用方式 GB/T 7714	Salvador M.,Gasparini N.,Perea J.D.,et al. Suppressing photooxidation of conjugated polymers and their blends with fullerenes through nickel chelates[J],2017,10(9).
APA	Salvador M..,Gasparini N..,Perea J.D..,Paleti S.H..,Distler A..,...&Brabec C..(2017).Suppressing photooxidation of conjugated polymers and their blends with fullerenes through nickel chelates.Energy & Environmental Science,10(9).
MLA	Salvador M.,et al."Suppressing photooxidation of conjugated polymers and their blends with fullerenes through nickel chelates".Energy & Environmental Science 10.9(2017).