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Easily accessible conjugated pyrene sulfonates as cathode interfacial materials for polymer solar cells
Zhou, Lingyu1,2; Yu, Wei1; Yu, Shuwen1; Fu, Ping1; Guo, Xin1; Li, Can1
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2017-01-14
DOI10.1039/c6ta08385d
Volume5Issue:2Pages:657-662
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS KeywordSMALL-MOLECULE ELECTROLYTE ; FILL FACTOR ; PERFORMANCE ; EFFICIENCY ; LAYER ; INTERLAYER ; ENHANCEMENT ; STABILITY ; DEVICES
AbstractTwo easily accessible pi-conjugated pyrene sulfonates, 1-pyrenesulfonic acid sodium salt (PyS) and 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt (PyTS), as cathode interfacial layers (CILs) for polymer solar cells (PSCs) are demonstrated. The two interlayer materials, with polar sulfonates directly linking to a conjugated unit, are quite different from other kinds of interfacial materials with functional groups attached to non-conjugated alkyl chains. Moreover, the two molecules show distinct intramolecular dipoles. PyS with a strong permanent dipole moment can reduce the work function of the bulk-heterojunction (BHJ) films, while centrosymmetric PyTS with no overall dipole has little effect on the work function of BHJ films. It is also found that PyS based devices show much improved charge transport ability and conductivity than those based on PyTS. As a result, PyS based devices exhibit a high power conversion efficiency (PCE) of 7.46% for the PBDTTT-C:PC71BM system, while PyTS based devices show a relatively low PCE of 6.28%. A higher efficiency of 8.82% is achieved for PTB7-Th as the donor. In addition, benefitting from the planar structure of the pyrene units, PyS with high conductivity can function efficiently in a wide thickness range of 2 to 41 nm.
Language英语
WOS IDWOS:000392413600022
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/151865
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Lingyu,Yu, Wei,Yu, Shuwen,et al. Easily accessible conjugated pyrene sulfonates as cathode interfacial materials for polymer solar cells[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(2):657-662.
APA Zhou, Lingyu,Yu, Wei,Yu, Shuwen,Fu, Ping,Guo, Xin,&Li, Can.(2017).Easily accessible conjugated pyrene sulfonates as cathode interfacial materials for polymer solar cells.JOURNAL OF MATERIALS CHEMISTRY A,5(2),657-662.
MLA Zhou, Lingyu,et al."Easily accessible conjugated pyrene sulfonates as cathode interfacial materials for polymer solar cells".JOURNAL OF MATERIALS CHEMISTRY A 5.2(2017):657-662.
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