气候变化领域集成服务门户(CCPortal): Highly crystalline low-bandgap polymer nanowires towards high-performance thick-film organic solar cells exceeding 10% power conversion efficiency

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DOI	10.1039/c6ee02466a
	Highly crystalline low-bandgap polymer nanowires towards high-performance thick-film organic solar cells exceeding 10% power conversion efficiency
	Lee J.; Sin D.H.; Moon B.; Shin J.; Kim H.G.; Kim M.; Cho K.
发表日期	2017
ISSN	17545692
起始页码	247
结束页码	257
卷号	10 期号:1
英文摘要	Preparing polymer nanowire (PNW) structures using donor-acceptor (D-A) conjugated polymers is one promising strategy to improve the power conversion efficiencies (PCEs) of bulk-heterojunction (BHJ) polymer solar cells (PSCs). Here, we report that a high PCE of 10.62% was obtained with a single-junction inverted cell with a 350 nm thick active layer containing highly crystalline PNWs based on a D-A conjugated polymer (P4TNTz-2F), which possesses a deep-lying HOMO level (-5.46 eV) and a low-bandgap (1.59 eV) as well as a planar/rigid backbone. The thick active layer in the P4TNTz-2F:PC71BM-based PSC absorbs incident light almost completely, which in turn contributes to a high short-circuit current density of 19.45 mA cm-2. This high PCE is attributed to the continuous and evenly distributed polymer network with narrow PNWs (≈6 nm in width and several hundred nanometers in length) in the thick film blended with PC71BM, which facilitates charge separation (QPL ≈ 98%) and transport (μh = 8.31 × 10-3 cm2 V-1 s-1). Moreover, this PNW structure in the BHJ active layer can be prepared using a facile film-forming process at a mild blending temperature (≈70°C), which means that high efficiency BHJ PSCs can be fabricated with good reproducibility. These results demonstrate the great promise of polymer nanowire solar cells and provide important scientific insights that facilitate further improvements in the morphologies and performances of organic solar cells through material design and development. © The Royal Society of Chemistry 2017.
英文关键词	Blending; Conjugated polymers; Conversion efficiency; Crystalline materials; Efficiency; Energy gap; Heterojunctions; Nanostructured materials; Nanowires; Organic solar cells; Thick films; Blending temperature; Bulk heterojunction (BHJ); Charge separations; Low bandgap polymers; Polymer solar cell (PSCs); Power conversion efficiencies; Reproducibilities; Thick active layers; Solar cells; active layer; crystallinity; design; energy efficiency; fuel cell; performance assessment; polymer; 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/190570
作者单位	Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, South Korea
推荐引用方式 GB/T 7714	Lee J.,Sin D.H.,Moon B.,et al. Highly crystalline low-bandgap polymer nanowires towards high-performance thick-film organic solar cells exceeding 10% power conversion efficiency[J],2017,10(1).
APA	Lee J..,Sin D.H..,Moon B..,Shin J..,Kim H.G..,...&Cho K..(2017).Highly crystalline low-bandgap polymer nanowires towards high-performance thick-film organic solar cells exceeding 10% power conversion efficiency.Energy & Environmental Science,10(1).
MLA	Lee J.,et al."Highly crystalline low-bandgap polymer nanowires towards high-performance thick-film organic solar cells exceeding 10% power conversion efficiency".Energy & Environmental Science 10.1(2017).