Efficiency improved for inverted polymer solar cells with electrostatically self-assembled BenMelm-CI ionic liquid layer as cathode interface layer

被引：72

作者：

Fu, Ping ^{[1
,2
]}

Huang, Linquan ^{[1
,2
]}

Yu, Wei ^{[1
,2
]}

Yang, Dong ^{[1
]}

Liu, Guiji ^{[1
,2
]}

Zhou, Lingyu ^{[1
,2
]}

Zhang, Jian ^{[1
]}

Li, Can ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

NANO ENERGY | 2015年 / 13卷

基金：

中国国家自然科学基金;

关键词：

Inverted polymer; solar cells; Ionic liquid; Self-assembled; Cathode interface; Layer; BUFFER LAYER;

D O I：

10.1016/j.nanoen.2015.02.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interlayer inserted between active layer and ITO has been a key issue for improving electron extraction in inverted polymer solar cells (IPSCs), while the ideal interlayer for IPSCs has not been well developed. In this work, we presented a spontaneous vertical phase separation (SVPS) self-assembled bilayers structure with BenMelm-CI ionic liquid (IL) interfacial bottom layer and a photoactive top layer via a single spin-coated step of BenMelm-CI IL and organic donor-acceptor composite and achieved a PCE as high as 8% based on IPSCs with PTB7 as the donor. The presence of BenMelm-CI IL reduces the work function of ITO and leads to a better energy-level matching for efficient charge-transfer. The driving force of SVPS selfassembled structure is from the relative surface energy difference between organic materials and BenMelm-CI ILs, together with their interactions with the substrates. This self-assembled process procedure pave the way to simplify the manufacturing of low-cost and large-area organic electronic devices. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：275 / 282

页数：8

共 34 条

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