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题名: Easily accessible conjugated pyrene sulfonates as cathode interfacial materials for polymer solar cells
作者: Zhou, Lingyu1, 2;  Yu, Wei1;  Yu, Shuwen1;  Fu, Ping1;  Guo, Xin1;  Li, Can1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2017-01-14
DOI: 10.1039/c6ta08385d
卷: 5, 期:2, 页:657-662
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: Two 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.
关键词[WOS]: SMALL-MOLECULE ELECTROLYTE ;  FILL FACTOR ;  PERFORMANCE ;  EFFICIENCY ;  LAYER ;  INTERLAYER ;  ENHANCEMENT ;  STABILITY ;  DEVICES
语种: 英语
WOS记录号: WOS:000392413600022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151865
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.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:
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.
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