Improved Performance for Inverted Organic Photovoltaics via Spacer between Benzodithiophene and Benzothiazole in Polymers

doi:10.1021/acs.jpcc.5b05608

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 机器人与3D打印技术创新中心

	Improved Performance for Inverted Organic Photovoltaics via Spacer between Benzodithiophene and Benzothiazole in Polymers
	Mohammad, Lal 1; Chen, Qilang 1; Abu Mitul 1; Sun, Jianyuan 2; Khatiwada, Devendra 1; Vaagensmith, Bjorn 1; Zhang, Cheng 2; Li, Jing3 ; Qiao, Qiquan 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2015-08-20
卷号	119 期号:33 页码:18992-19000
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.5b05608
通讯作者	Zhang, C (reprint author), S Dakota State Univ, Dept Chem & Biochem, Brookings, SD 57007 USA.
英文摘要	In this work, the effects of the spacer between benzo[1,2-b;3,4-b']dithiophene (BDT) and dialkoxybenzothiadiazole (ROBT) in polymers were investigated for applications in organic solar cells. Polymer PBDT-2T-ROBT has a bithiophene (2T) spacer between the BDT and ROBT units, whereas PBDT-ROBT is a direct copolymer of BDT and ROBT. The polymer/PC70BM solar cells using both polymers were fabricated and optimized via polymer/fullerene ratio, solvent, and solvent additives. The spacer has significantly improved solar cell performance from 1.28% (V-oc =0.77 V, J(sc) = 3.13 mA/cm(2), FF = 53.11%) to 5.11% (V-oc = 0.66 V, J(sc) = 13.33 mA/cm(2), FF = 58.12%). The X-ray diffraction (XRD) spectra show the PBDT-2T-ROBT/PC70BM blended film is semicrystalline, whereas the PBDT-ROBT/PC70BM film is amorphous. This indicates that the spacer facilitates polymer organization for higher carrier mobility in the film Atomic force microscopy (AFM) topography and phase images show that PBDT-2T-ROBT/PC70BM films form fibrillar networks, whereas PBDT-ROBT/PC70BM films exhibit larger granular morphology. The photoinduced charge extraction by linearly increasing voltage (Photo-CELIV) measurements show that PBDT-2T-ROBT/PC70BM has a mobility-of 9.59 x 10(-5) cm(2)/(V.s), which is higher than the mobility of 8.64 x 10(-5) cm(2)/(V.s) for PBDT ROBT/PC70BM film.
资助项目	NSF CAREER[ECCS-0950731] ; NASA EPSCoR[NNX13AD31A] ; NSF MRI[1229577] ; NSF MRI[1428992]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000360026200019
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/1865]
专题	机器人与3D打印技术创新中心
通讯作者	Zhang, Cheng
作者单位	1.S Dakota State Univ, Dept Elect Engn, Ctr Adv Photovolta, Brookings, SD 57007 USA 2.S Dakota State Univ, Dept Chem & Biochem, Brookings, SD 57007 USA 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Mohammad, Lal,Chen, Qilang,Abu Mitul,et al. Improved Performance for Inverted Organic Photovoltaics via Spacer between Benzodithiophene and Benzothiazole in Polymers[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(33):18992-19000.
APA	Mohammad, Lal.,Chen, Qilang.,Abu Mitul.,Sun, Jianyuan.,Khatiwada, Devendra.,...&Qiao, Qiquan.(2015).Improved Performance for Inverted Organic Photovoltaics via Spacer between Benzodithiophene and Benzothiazole in Polymers.JOURNAL OF PHYSICAL CHEMISTRY C,119(33),18992-19000.
MLA	Mohammad, Lal,et al."Improved Performance for Inverted Organic Photovoltaics via Spacer between Benzodithiophene and Benzothiazole in Polymers".JOURNAL OF PHYSICAL CHEMISTRY C 119.33(2015):18992-19000.