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4,7-Di-2-thienyl-2,1,3-benzothiadiazole with hexylthiophene side chains and a benzodithiophene based copolymer for efficient organic solar cells
Ren, Junzhen1,2; Bao, Xichang2; Han, Liangliang2; Wang, Jiuxing2; Qiu, Meng2; Zhu, Qianqian2; Hu, Tong1,2; Sheng, Ruiying1,2; Sun, Mingliang1; Yang, Renqiang2
2015
Source PublicationPOLYMER CHEMISTRY
Volume6Issue:24Pages:4415-4423
AbstractIn this work, a hexylthiophene substituted thiophene-bridge is used to connect benzodithiophene (BDT) and benzothiadiazole (BT) segments to build a new photovoltaic polymer (PBDT-DTTBT). The highest occupied molecular orbital (HOMO) level of the polymer is decreased by 0.2 eV to -5.47 eV compared to the reference polymer without a hexylthiophene side chain, which may be ascribed to the conformational torsion caused by the steric hindrance from the bulky hexylthiophene side group. The band gap of the polymer shows no obvious change compared to a polymer with a same backbone without a hexylthiophene side chain (around 1.7 eV). Polymer solar cells (PSCs) based on PBDT-DTTBT and [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) exhibit a maximum power conversion efficiency (PCE) of 6.19% with an open-circuit voltage (V-oc) of 0.80 V, a short-circuit current density (J(sc)) of 12.72 mA cm(-2) and a fill factor (FF) of 60.97%. The work provides a new method to design new conjugated polymers with a deep HOMO level and a low band gap for high V-oc PSCs.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c5py00199d
WOS KeywordPOWER CONVERSION EFFICIENCY ; DONOR-ACCEPTOR COPOLYMERS ; OPEN-CIRCUIT VOLTAGE ; LOW-BANDGAP POLYMER ; HIGH-PERFORMANCE ; CONJUGATED POLYMERS ; PROCESSING ADDITIVES ; PHOTOVOLTAIC PERFORMANCE ; CHARGE-TRANSFER ; DERIVATIVES
Indexed BySCI
Language英语
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000356022300009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qibebt.ac.cn/handle/337004/6478
Collection先进有机功能材料研究组
Affiliation1.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
Recommended Citation
GB/T 7714
Ren, Junzhen,Bao, Xichang,Han, Liangliang,et al. 4,7-Di-2-thienyl-2,1,3-benzothiadiazole with hexylthiophene side chains and a benzodithiophene based copolymer for efficient organic solar cells[J]. POLYMER CHEMISTRY,2015,6(24):4415-4423.
APA Ren, Junzhen.,Bao, Xichang.,Han, Liangliang.,Wang, Jiuxing.,Qiu, Meng.,...&Yang, Renqiang.(2015).4,7-Di-2-thienyl-2,1,3-benzothiadiazole with hexylthiophene side chains and a benzodithiophene based copolymer for efficient organic solar cells.POLYMER CHEMISTRY,6(24),4415-4423.
MLA Ren, Junzhen,et al."4,7-Di-2-thienyl-2,1,3-benzothiadiazole with hexylthiophene side chains and a benzodithiophene based copolymer for efficient organic solar cells".POLYMER CHEMISTRY 6.24(2015):4415-4423.
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