Impact of the position isomer of the linkage in the double D–A branch-based organic dyes on the photovoltaic performance
Impact of the position isomer of the linkage in the double D–A branch-based organic dyes on the photovoltaic performance
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DOI：
10.1016/j.dyepig.2013.12.028
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发表时间：
2014-05
影响因子：
4.5
通讯作者：
X. Zang;Teng Zhang;Zu-Sheng Huang;Z. Iqbal;D. Kuang;Lingyun Wang;H. Meier;D. Cao
中科院分区：
文献类型：
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作者：
X. Zang;Teng Zhang;Zu-Sheng Huang;Z. Iqbal;D. Kuang;Lingyun Wang;H. Meier;D. Cao
合成了三种双D-A体系有机染料并将其应用于染料敏化太阳能电池。这些染料含有吩噻嗪作为电子供体和氰乙酸作为受体/锚定物。在邻位、间位和对位处结合连接，并观察它们对光伏性能的影响。其中，具有对位连接的染料表现出最高的短路光电流密度（12.26 mA cm−2）和开路光电压（756 mV），由于在标准全球1.5 AM条件下具有更好的光捕获能力，因此具有最佳的整体效率（6.14％）。在类似的测量条件下，具有邻位和间位连接的染料将阳光转化为电能的效率分别为5.25%和5.85%。结果表明，连接单元的位置异构体影响光物理特性、薄膜上的染料负载和电子寿命。
Three organic dyes with double D–A system were synthesized and applied in the dye-sensitized solar cells. These dyes contain phenothiazine as an electron donor and cyanoacetic acid as an acceptor/anchor. Linkages were incorporated at the ortho-, meta- and para-positions and their impact on the performance of photovoltaic was observed. Among them, the dye with a para-position linkage exhibited the highest short-circuit photocurrent density (12.26 mA cm−2) and open-circuit photovoltage (756 mV), leading to the best overall efficiency (6.14%) due to better light harvesting capacity under standard global 1.5 AM conditions. Under similar measuring conditions the dyes with ortho and meta-position linkage delivered sunlight to electricity conversion efficiencies of 5.25% and 5.85% respectively. The result shows the position isomer of the linkage units influences the photophysical characteristics, dye loading on the film and electron lifetime.