Photovoltaic properties of bulk heterojunction solar cells with improved spectral coverage

被引:31
作者
Ltaief, A
Ben Chadbane, R
Bouazizi, A
Davenas, J
机构
[1] Fac Sci Monastir, Lab Phys & Chim Interfaces, Monastir 5019, Tunisia
[2] Univ Lyon 1, CNRS, UMR 5627, Lab Mat Polymeres & Biomat, Lyon, France
来源
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2006年 / 26卷 / 2-3期
关键词
conjugated polymers; organic dyes; fullerene; spectral coverage;
D O I
10.1016/j.msec.2005.10.040
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The potential of dye sensitization of organic solar cells has been investigated. The electrical and photoelectrical properties of such devices have been studied. The architecture of the solar cell is based on spin-coated thin films of MEH-PPV sensitized with Hydrogen Phthalocyanine (PcH2) and Coumarin 343 dyes, which are sandwiched between indium tin oxide (ITO)-coated glass and aluminium electrodes. By adding PcH2 and Coumarin 343 to the MEH-PPV active layer the width of absorption spectrum increases drastically. Introduction of a methine unit (-CH=CH-) connecting the cyano (-CN) and carboxyl (-COOH) groups into the Coumarin 343 framework expanded the pi-conjugated in the dye and thus resulted in a wide absorption in the visible region. The sensitization of the MEH-PPV thin film by PcH2 and Coumarin 343 dyes leads to photoluminescence (PL) enhancement whereas the incorporation of fullerene molecules (C-60) in the blend, acting as electron acceptors, induces PL quenching due to the separation of the photogenerated charges. Photocurrent enhancement and increase of the open circuit voltage are induced by dye sensitization of MEH-PPV/C-60 blends. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:344 / 347
页数:4
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