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DOI	10.1039/c7ee02983g
	The role of fullerenes in the environmental stability of polymer:fullerene solar cells
	Lee H.K.H.; Telford A.M.; Röhr J.A.; Wyatt M.F.; Rice B.; Wu J.; De Castro Maciel A.; Tuladhar S.M.; Speller E.; McGettrick J.; Searle J.R.; Pont S.; Watson T.; Kirchartz T.; Durrant J.R.; Tsoi W.C.; Nelson J.; Li Z.
发表日期	2018
ISSN	17545692
起始页码	417
结束页码	428
卷号	11 期号:2
英文摘要	Environmental stability is a common challenge for the commercialisation of low cost, encapsulation-free organic opto-electronic devices. Understanding the role of materials degradation is the key to address this challenge, but most such studies have been limited to conjugated polymers. Here we quantitatively study the role of the common fullerene derivative PCBM in limiting the stability of benchmark organic solar cells, showing that a minor fraction (<1%) of photo-oxidised PCBM, induced by short exposure to either solar or ambient laboratory lighting conditions in air, consistent with typical processing and operating conditions, is sufficient to compromise device performance severely. We identify the effects of photo-oxidation of PCBM on its chemical structure, and connect this to specific changes in its electronic structure, which significantly alter the electron transport and recombination kinetics. The effect of photo-oxidation on device current-voltage characteristics, electron mobility and density of states could all be explained with the same model of photoinduced defects acting as trap states. Our results demonstrate that the photochemical instability of PCBM and chemically similar fullerenes remains a barrier for the commercialisation of organic opto-electronic devices. © 2018 The Royal Society of Chemistry.
英文关键词	Benchmarking; Conjugated polymers; Current voltage characteristics; Electron devices; Electron transport properties; Electronic equipment; Electronic structure; Fullerenes; Optoelectronic devices; Organic solar cells; Oxidation; Photomasks; Polymer solar cells; Stability; Thermoelectric equipment; Encapsulation-free; Environmental stability; Fullerene derivative; Lighting conditions; Materials degradation; Operating condition; Photoinduced defects; Recombination kinetics; Solar cells; degradation; electron; electronic equipment; environmental impact; fuel cell; fullerene; mobility; organic compound; photochemistry; photooxidation; polymer; processing; solar power
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/190327
作者单位	SPECIFIC IKC, College of Engineering, Bay Campus, Swansea UniversitySA1 8EN, United Kingdom; Department of Physics, Imperial College London, London, SW7 2AZ, United Kingdom; EPSRC UK National Mass Spectrometry Facility (NMSF), Swansea University Medical SchoolSA2 8PP, United Kingdom; Department of Chemistry, Imperial College London, London, SW7 2A, United Kingdom; Department of Physics, CCN, Federal University of Piauí, Teresina, 64049-550, Brazil; IEK5-Photovoltaics, Forschungszentrum Jülich, Jülich, 52425, Germany; Faculty of Engineering and CENIDE, University of Duisburg-Essen, Carl-Benz-Str. 199, Duisburg, 47057, Germany
推荐引用方式 GB/T 7714	Lee H.K.H.,Telford A.M.,Röhr J.A.,et al. The role of fullerenes in the environmental stability of polymer:fullerene solar cells[J],2018,11(2).
APA	Lee H.K.H..,Telford A.M..,Röhr J.A..,Wyatt M.F..,Rice B..,...&Li Z..(2018).The role of fullerenes in the environmental stability of polymer:fullerene solar cells.Energy & Environmental Science,11(2).
MLA	Lee H.K.H.,et al."The role of fullerenes in the environmental stability of polymer:fullerene solar cells".Energy & Environmental Science 11.2(2018).