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Alkylthienyl substituted asymmetric 2D BDT and DTBT-based polymer solar cells with a power conversion efficiency of 9.2%
Gu, Chuantao1; Liu, Deyu2,4; Wang, Junyi2; Niu, Qingfen3; Gu, Chunyang2; Shahid, Bilal2,4; Yu, Bing1; Cong, Hailin1; Yang, Renqiang2
2018-02-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume6Issue:5Pages:2371-2378
AbstractAn alkyl thiophene unit was employed for the first time as a side chain substituent on an asymmetric benzodithiophene (BDT) building block in the design of novel light-harvesting polymers. A new D-A type polymer (PBDTTh-DTffBT) based on alkylthienyl asymmetric BDT and the well-known 4,7-di(thiophen-2-ethylhexyl)-5,6-difluoro-2,1,3-benzothiadiazole (DTffBT) was synthesized through a palladium catalyzed Stille coupling reaction. Efficient bulk heterojunction solar cells were fabricated by blending PBDTTh-DTffBT with PC71BM. The optimized PBDTTh-DTffBT-based photovoltaic device exhibits an open circuit voltage (V-OC) of 0.87 V, a short-circuit current density (J(SC)) of 15.06 mA cm(-2), a fill factor (FF) of 70.4% and a high power conversion efficiency (PCE) of 9.22%. The PCE was higher than the polymers which have the same backbone structure but also have the 1D or 2D symmetric BDT unit. In addition, a PCE of 7.83% with a V-OC of 0.91 V, a J(SC) of 13.62 mA cm(-2), and an FF of 63.2% was obtained for PBDTTh-DTffBT/ITIC, which is also impressive for non-fullerene PSCs. The results indicate that our design strategy of introducing an alkylthienyl unit as side chain to fabricate asymmetric BDT-based polymer is efficient in improving the photovoltaic performance.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c7ta10247j
WOS KeywordLOW-BANDGAP POLYMERS ; OPEN-CIRCUIT VOLTAGE ; PHOTOVOLTAIC PERFORMANCE ; FLUORINATED BENZOTHIADIAZOLE ; PROCESSING ADDITIVES ; CONJUGATED POLYMER ; ELECTRON-ACCEPTORS ; MOLECULAR DESIGN ; GAP POLYMERS ; BENZODITHIOPHENE
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
Funding OrganizationNational Natural Science Foundation of China(51773220 ; Taishan Young Scholar Program of Shandong Province(tsqn20161027) ; Natural Science Foundation of Shandong Province(ZR2017LB009) ; People's Livelihood Science and Technology Project of Qingdao(166257nsh ; China Postdoctoral Science Foundation(2017M612192) ; Source Innovation Project of Qingdao(17-1-1-83-jch) ; First Class Discipline Project of Shandong Province ; 51573205 ; 173378nsh) ; 21675091 ; 21574072)
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000423981200054
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qibebt.ac.cn/handle/337004/10560
Collection先进有机功能材料研究组
Corresponding AuthorNiu, Qingfen; Cong, Hailin; Yang, Renqiang
Affiliation1.Qingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
3.Qilu Univ Technol, Sch Chem & Pharmaceut Engn, Shandong Prov Key Lab Fine Chem, Jinan 250353, Shandong, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gu, Chuantao,Liu, Deyu,Wang, Junyi,et al. Alkylthienyl substituted asymmetric 2D BDT and DTBT-based polymer solar cells with a power conversion efficiency of 9.2%[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(5):2371-2378.
APA Gu, Chuantao.,Liu, Deyu.,Wang, Junyi.,Niu, Qingfen.,Gu, Chunyang.,...&Yang, Renqiang.(2018).Alkylthienyl substituted asymmetric 2D BDT and DTBT-based polymer solar cells with a power conversion efficiency of 9.2%.JOURNAL OF MATERIALS CHEMISTRY A,6(5),2371-2378.
MLA Gu, Chuantao,et al."Alkylthienyl substituted asymmetric 2D BDT and DTBT-based polymer solar cells with a power conversion efficiency of 9.2%".JOURNAL OF MATERIALS CHEMISTRY A 6.5(2018):2371-2378.
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