气候变化领域集成服务门户(CCPortal): Balancing the pre-aggregation and crystallization kinetics enables high efficiency slot-die coated organic solar cells with reduced non-radiative recombination losses

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DOI	10.1039/d0ee00774a
	Balancing the pre-aggregation and crystallization kinetics enables high efficiency slot-die coated organic solar cells with reduced non-radiative recombination losses
	Lin B.; Zhou X.; Zhao H.; Yuan J.; Zhou K.; Chen K.; Wu H.; Guo R.; Scheel M.A.; Chumakov A.; Roth S.V.; Mao Y.; Wang L.; Tang Z.; Müller-Buschbaum P.; Ma W.
发表日期	2020
ISSN	17545692
起始页码	2467
结束页码	2479
卷号	13 期号:8
英文摘要	Slot-die coating being compatible with the roll-to-roll technique has been regarded as a promising tool for upscaling the manufacturing of organic solar cells (OSCs). However, there has been a significant gap between the efficiencies of the state-of-the-art spin-coated devices and the scalable processed devices. The active layer morphology is crucial to achieve high efficiency in OSCs, which depends on the conditions of film fabrication. To figure out and optimize the slot-die coating process, a deeper understanding of the film formation kinetics is important. Herein, in situ measurements of the slot-die coating process based on the PM7:IT4F system are demonstrated to illustrate the aggregation and crystallization evolution at various die temperatures and substrate temperatures. OSCs with a high power conversion efficiency of 13.2% are achieved at 60 °C die temperature/60 °C substrate temperature due to the improved exciton dissociation, charge transport and suppressed non-radiative charge recombination. The optimized morphology is attributed to the balanced polymer pre-aggregation and small molecule crystallization kinetics. The unsuitable die temperature leads to overlarge phase separation and consequently inefficient exciton dissociation while the improper substrate temperature results in weak crystallization and the following shrunken carrier lifetime with strong non-radiative combination. This work provides fundamental understanding on the correlations among processing methodology, solution pre-aggregation, morphology formation kinetics, device physics and device performance and affords guidance for device optimization in scalable manufacturing. © 2020 The Royal Society of Chemistry.
英文关键词	Coatings; Conversion efficiency; Dies; Dissociation; Efficiency; Excitons; Kinetics; Manufacture; Morphology; Organic solar cells; Phase separation; Charge recombinations; Device optimization; Exciton dissociation; High power conversion; Morphology formation; Non-radiative recombinations; Roll-to-roll techniques; Substrate temperature; Crystallization kinetics; active layer; coating; crystallization; detection method; equipment; in situ measurement; reaction kinetics; temperature effect
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/189602
作者单位	State Key Laboratory for Mechanical Behavior of Materials, Xi'An Jiaotong University, Xi'an, 710049, China; College of Pharmacy, Xi'An Jiaotong University, Xi' an, 710049, China; Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China; Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien James-Franck-Str. 1, Garching, 85748, Germany; Deutsches Elektronen-Synchrotron (DESY), Hamburg, 22607, Germany; KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, Stockholm, SE-100 44, Sweden; NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899, United States; State Key Laboratory of Electrical Insulation and Power Equipment, Xi'An Jiaotong University, Xi'an, 710049, China; Technische Universität München, Heinz M...
推荐引用方式 GB/T 7714	Lin B.,Zhou X.,Zhao H.,et al. Balancing the pre-aggregation and crystallization kinetics enables high efficiency slot-die coated organic solar cells with reduced non-radiative recombination losses[J],2020,13(8).
APA	Lin B..,Zhou X..,Zhao H..,Yuan J..,Zhou K..,...&Ma W..(2020).Balancing the pre-aggregation and crystallization kinetics enables high efficiency slot-die coated organic solar cells with reduced non-radiative recombination losses.Energy & Environmental Science,13(8).
MLA	Lin B.,et al."Balancing the pre-aggregation and crystallization kinetics enables high efficiency slot-die coated organic solar cells with reduced non-radiative recombination losses".Energy & Environmental Science 13.8(2020).