气候变化领域集成服务门户(CCPortal): High-efficiency photovoltaic cells with wide optical band gap polymers based on fluorinated phenylene-alkoxybenzothiadiazole

CCPortal

DOI	10.1039/c6ee03051c
	High-efficiency photovoltaic cells with wide optical band gap polymers based on fluorinated phenylene-alkoxybenzothiadiazole
	Ko S.-J.; Hoang Q.V.; Song C.E.; Uddin M.A.; Lim E.; Park S.Y.; Lee B.H.; Song S.; Moon S.-J.; Hwang S.; Morin P.-O.; Leclerc M.; Su G.M.; Chabinyc M.L.; Woo H.Y.; Shin W.S.; Kim J.Y.
发表日期	2017
ISSN	17545692
起始页码	1443
结束页码	1455
卷号	10 期号:6
英文摘要	A series of semi-crystalline, wide band gap (WBG) photovoltaic polymers were synthesized with varying number and topology of fluorine substituents. To decrease intramolecular charge transfer and to modulate the resulting band gap of D-A type copolymers, electron-releasing alkoxy substituents were attached to electron-deficient benzothiadiazole (A) and electron-withdrawing fluorine atoms (0-4F) were substituted onto a 1,4-bis(thiophen-2-yl)benzene unit (D). Intra- and/or interchain noncovalent Coulombic interactions were also incorporated into the polymer backbone to promote planarity and crystalline intermolecular packing. The resulting optical band gap and the valence level were tuned to 1.93-2.15 eV and -5.37 to -5.67 eV, respectively, and strong interchain organization was observed by differential scanning calorimetry, high-resolution transmission electron microscopy and grazing incidence X-ray scattering measurements. The number of fluorine atoms and their position significantly influenced the photophysical, morphological and optoelectronic properties of bulk heterojunctions (BHJs) with these polymers. BHJ photovoltaic devices showed a high power conversion efficiency (PCE) of up to 9.8% with an open-circuit voltage of 0.94-1.03 V. To our knowledge, this PCE is one of the highest values for fullerene-based single BHJ devices with WBG polymers having a band gap of over 1.90 eV. A tandem solar cell was also demonstrated successfully to show a PCE of 10.3% by combining a diketopyrrolopyrrole-based low band gap polymer. © The Royal Society of Chemistry 2017.
英文关键词	Crystalline materials; Differential scanning calorimetry; Efficiency; Electrons; Energy gap; Fluorine; Fullerenes; Heterojunctions; Open circuit voltage; Optical band gaps; Photoelectrochemical cells; Photovoltaic cells; Polymer solar cells; Polymers; Scanning electron microscopy; Solar cells; Transmission electron microscopy; Coulombic interactions; Diketopyrrolopyrroles; Fluorine substituents; Grazing-incidence x-ray scattering; High power conversion; Intermolecular packing; Intra-molecular charge transfer; Optoelectronic properties; High resolution transmission electron microscopy; crystallinity; fluorine; fuel cell; grazing; photovoltaic system; polymer; solar power; topology
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/190468
作者单位	Center for Polymers and Organic Solids, University of California Santa Barbara (UCSB), Santa Barbara, CA 93106, United States; School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea; Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, South Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 305-350, South Korea; Department of Chemistry, Korea University, Seoul, 136-713, South Korea; Department of Nanomechatronics Engineering, Pusan National University, Miryang, 627-706, South Korea; Materials Department, University of California Santa Barbara (UCSB), Santa Barbara, CA 93106, United States; Department of Chemistry, Laval University, Quebec City, QC G1V 0A6, Canada; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Divis...
推荐引用方式 GB/T 7714	Ko S.-J.,Hoang Q.V.,Song C.E.,et al. High-efficiency photovoltaic cells with wide optical band gap polymers based on fluorinated phenylene-alkoxybenzothiadiazole[J],2017,10(6).
APA	Ko S.-J..,Hoang Q.V..,Song C.E..,Uddin M.A..,Lim E..,...&Kim J.Y..(2017).High-efficiency photovoltaic cells with wide optical band gap polymers based on fluorinated phenylene-alkoxybenzothiadiazole.Energy & Environmental Science,10(6).
MLA	Ko S.-J.,et al."High-efficiency photovoltaic cells with wide optical band gap polymers based on fluorinated phenylene-alkoxybenzothiadiazole".Energy & Environmental Science 10.6(2017).