Stable organic dyes basedon the benzo[1,2-b:4,5-b′]dithiophene donor for efficient dye-sensitized solar cells
Stable organic dyes basedon the benzo[1,2-b:4,5-b′]dithiophene donor for efficient dye-sensitized solar cells
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基于苯并[1,2-b:4,5-b']二噻吩供体的稳定有机染料，用于高效染料敏化太阳能电池
DOI：
10.1039/c5ta00332f
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发表时间：
2015-01-01
影响因子：
11.9
通讯作者：
Su, Cheng-Yong
中科院分区：
文献类型：
--
作者：
Chen, Yi-Fan;Liu, Jun-Min;Su, Cheng-Yong
Two novel arylamine-free organic compounds (CYF1 and CYF2) incorporating a substituted benzo[1,2-b:4,5-b']dithiophene unit as the electron donor were synthesized and used as sensitizers for dye-sensitized solar cells (DSSCs). The relationship between the chemical structure and photovoltaic performance was investigated. A higher molar absorption coefficient, longer electron lifetime, and larger adsorption amount were observed for sensitizer CYF1, which contains a single p bridge and anchoring unit, compared with CYF2 with twin p bridges and anchoring units. As a result, under standard global AM 1.5 solar conditions, the device based on CYF1 sensitizer gave a higher conversion efficiency of 8.02% than that based on CYF2. This is the highest value for amine-free organic sensitizers with no strong donor units. Moreover, the CYF1- and CYF2-sensitized DSSCs exhibited excellent stability under 1000 W m(2) light soaking at 60 degrees C for 600 h. This is the first example of organic sensitizers based on benzo[1,2-b:4,5-b']dithiophene donors for efficient dye-sensitized solar cells.
