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DOI	10.1039/c8ee03780a
	A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells
	Zhang C.; Heumueller T.; Leon S.; Gruber W.; Burlafinger K.; Tang X.; Perea J.D.; Wabra I.; Hirsch A.; Unruh T.; Li N.; Brabec C.J.
发表日期	2019
ISSN	1754-5692
起始页码	1078
结束页码	1087
卷号	12 期号:3
英文摘要	The operational stability of organic solar cells (OSCs) is the essential barrier to commercialization. Compared to thermally-induced degradation, photo-stability of OSCs is far away from being resolved. Here, we demonstrate that the thermal- and photo-degradation of metastable bulk-heterojunction OSCs are governed by the same mechanism. Understanding the fundamental principles behind this mechanism is of significant importance to fully address the instability issues. Structural incompatibilities between the donor and acceptor molecules are identified as the main origin of the instability. Further, we introduce a top-down approach mainly based on their melting temperature and interaction parameters to rationally screen molecular phase stabilizers from a database with more than 10000 small molecules. Eventually, five chemicals were selected to validate our concept and tested in unstable organic solar cells. 1,4-Piperazine, which possesses a high melting point, good miscibility with polymers and the capability of forming inter-molecular hydrogen bonding, can indeed stabilize the mixed amorphous phases, leading to significantly improved stability of otherwise metastable OSCs. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Heterojunctions; Hydrogen bonds; Melting point; Metastable phases; Molecules; Organic chemicals; Organic solar cells; Bulk heterojunction; Donor and acceptor; Fundamental principles; Inter molecular hydrogen bondings; Interaction parameters; Operational stability; Thermally induced degradations; Top down approaches; Solar cells; chemical bonding; chemical compound; equipment; fuel cell; microstructure; operations technology; performance assessment; photodegradation; polymer; temperature effect; top-down approach
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162910
作者单位	SUSTech Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, No. 1088, Xueyuan Rd., Shenzhen Guangdong, 518055, China; Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander University, Erlangen-Nürnberg, Martensstrasse 7, Erlangen, 91058, Germany; Departamento de Ingeniería Química, Universidad Politécnica de Madrid, ETSIIM, José Gutiérrez Abascal 2, Madrid, 28006, Spain; Institute for Crystallography and Structure Physics, Friedrich-Alexander University, Erlangen-Nürnberg Staudtstrasse 3, Erlangen, 91058, Germany; Institute of Organic Chemistry II, Friedrich-Alexander University, Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10, Erlangen, 91058, Germany; National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China; Bavarian Center for Applied Energy Research (ZAE Bayern), Immerwahrstr. 2, Erlangen, 91058, Germany
推荐引用方式 GB/T 7714	Zhang C.,Heumueller T.,Leon S.,et al. A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells[J],2019,12(3).
APA	Zhang C..,Heumueller T..,Leon S..,Gruber W..,Burlafinger K..,...&Brabec C.J..(2019).A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells.Energy and Environmental Science,12(3).
MLA	Zhang C.,et al."A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells".Energy and Environmental Science 12.3(2019).