Photovoltaic properties of bulk heterojunction solar cells with improved spectral coverage
Photovoltaic properties of bulk heterojunction solar cells with improved spectral coverage
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DOI：
10.1016/j.msec.2005.10.040
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
A. Ltaief;R. Chaâbane;A. Bouazizi;J. Davenas
中科院分区：
文献类型：
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作者：
A. Ltaief;R. Chaâbane;A. Bouazizi;J. Davenas
研究了有机太阳能电池染料敏化的潜力。研究了这种器件的电学和光电性能。太阳能电池的结构基于用邻苯二甲酸氢（PcH 2）和香豆素343染料敏化的MEH-PPV旋涂薄膜，该薄膜夹在氧化铟锡（ITO）涂层玻璃和铝电极之间。通过在MEH-PPV活性层中加入PcH 2和Coumarin 343，吸收光谱的宽度显著增加。在香豆素343的骨架中引入连接氰基（-CN）和羧基（-COOH）的次甲基单元（-CHCH-），扩大了染料中的π共轭，从而导致在可见光区的宽吸收。光敏化的MEH-PPV薄膜的PcH 2和香豆素343染料导致光致发光（PL）增强，而纳入富勒烯分子（C60）的共混物，作为电子受体，诱导PL猝灭由于光生电荷的分离。MEH-PPV/C_（60）共混物的染料敏化作用导致光电流增强和开路电压升高。
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 PcH2and Coumarin 343 to the MEH-PPV active layer the width of absorption spectrum increases drastically. Introduction of a methine unit (–CHCH–) connecting the cyano (–CN) and carboxyl (–COOH) groups into the Coumarin 343 framework expanded the π — conjugated in the dye and thus resulted in a wide absorption in the visible region. The sensitization of the MEH-PPV thin film by PcH2and Coumarin 343 dyes leads to photoluminescence (PL) enhancement whereas the incorporation of fullerene molecules (C60) 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/C60blends.