Synergy of Liquid-Crystalline Small-Molecule and Polymeric Donors Delivers Uncommon Morphology Evolution and 16.6% Efficiency Organic Photovoltaics

doi:10.1002/advs.202000149

	Synergy of Liquid-Crystalline Small-Molecule and Polymeric Donors Delivers Uncommon Morphology Evolution and 16.6% Efficiency Organic Photovoltaics
	Yan, Cenqi 1,2; Tang, Hua 1,2,3; Ma, Ruijie 4,5; Zhang, Ming 6,7; Liu, Tao 4,5; Lv, Jie 3; Huang, Jiaming 1,2; Yang, YanKang 6,7; Xu, Tongle 3; Kan, Zhipeng 3
刊名	ADVANCED SCIENCE
	2020-06-18
页码	8
关键词	liquid-crystalline molecules morphology organic solar cells ternary structures
DOI	10.1002/advs.202000149
通讯作者	Liu, Tao(liutaozhx@ust.hk) ; Liu, Feng(fengliu82@sjtu.edu.cn) ; Li, Gang(gang.w.li@polyu.edu.hk)
英文摘要	Achieving an ideal morphology is an imperative avenue for enhancing key parameters toward high-performing organic solar cells (OSCs). Among a myriad of morphological-control methods, the strategy of incorporating a third component with structural similarity and crystallinity difference to construct ternary OSCs has emerged as an effective approach to regulate morphology. A nematic liquid-crystalline benzodithiophene terthiophene rhodamine (BTR) molecule, which possesses the same alkylthio-thienyl-substituted benzo moiety but obviously stronger crystallinity compared to classical medium-bandgap polymeric donor PM6, is employed as a third component to construct ternary OSCs based on a PM6:BTR:Y6 system. The doping of BTR (5 wt%) is found to be enough to improve the OSC morphology-significantly enhancing the crystallinity of the photoactive layer while slightly reducing the donor/acceptor phase separation scale simultaneously. Rarely is such a morphology evolution reported. It positively affects the electronic properties of the device-prolongs the carrier lifetime, shortens the photocurrent decay time, facilitates exciton dissociation, charge transport, and collection, and ultimately boosts the power conversion efficiency from 15.7% to 16.6%. This result demonstrates that the successful synergy of liquid-crystalline small-molecule and polymeric donors delicately adjusts the active-layer morphology and refines device performance, which brings vibrancy to the OSC research field.
资助项目	Research Grants Council of Hong Kong[15218517] ; Research Grants Council of Hong Kong[C5037-18G] ; Shenzhen Science and Technology Innovation Commission[JCYJ20170413154602102] ; Hong Kong Polytechnic University[1-ZE29] ; National Youth Thousand Program Project[R52A199Z11] ; National Special Funds for Repairing and Purchasing Scientific Institutions[Y72Z090Q10] ; Artificial Intelligence Key Project of Chongqing[cstc2017rgzn-zdyfX0030] ; DOE, Office of Science, and Office of Basic Energy Sciences ; [YW3Y]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	WILEY
WOS记录号	WOS:000540812700001
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/11452]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Liu, Tao; Liu, Feng; Li, Gang
作者单位	1.Hong Kong Polytech Univ, ShenZhen Res Inst, Shenzhen 518057, Peoples R China 2.Hong Kong Polytech Univ, Dept Elect & Informat Engn, Hung Hum Kowloon, Hong Kong 999077, Peoples R China 3.Chongqing Inst Green & Intelligent Technol, Organ Semicond Res Ctr, Chongqing 400714, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China 5.Hong Kong Univ Sci & Technol, Hong Kong Branch, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China 6.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 7.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Yan, Cenqi,Tang, Hua,Ma, Ruijie,et al. Synergy of Liquid-Crystalline Small-Molecule and Polymeric Donors Delivers Uncommon Morphology Evolution and 16.6% Efficiency Organic Photovoltaics[J]. ADVANCED SCIENCE,2020:8.
APA	Yan, Cenqi.,Tang, Hua.,Ma, Ruijie.,Zhang, Ming.,Liu, Tao.,...&Li, Gang.(2020).Synergy of Liquid-Crystalline Small-Molecule and Polymeric Donors Delivers Uncommon Morphology Evolution and 16.6% Efficiency Organic Photovoltaics.ADVANCED SCIENCE,8.
MLA	Yan, Cenqi,et al."Synergy of Liquid-Crystalline Small-Molecule and Polymeric Donors Delivers Uncommon Morphology Evolution and 16.6% Efficiency Organic Photovoltaics".ADVANCED SCIENCE (2020):8.