Photoactive supercapacitors for solar energy harvesting and storage
Photoactive supercapacitors for solar energy harvesting and storage
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DOI：
10.1016/j.jpowsour.2014.10.110
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发表时间：
2015-02-01
影响因子：
9.2
通讯作者：
Bakhshi, Sara
中科院分区：
文献类型：
--
作者：
Takshi, Arash;Yaghoubi, Houman;Bakhshi, Sara
在大多数应用中，当太阳能电池用于能量收集时，需要能量存储装置。在这项工作中，我们证明了导电聚合物和染料的复合薄膜可以用作电化学电池中的光敏电极，用于同时进行太阳能转换和电荷存储。该装置由聚乙烯二氧噻吩：聚苯乙烯磺酸盐和（PEDOT：PSS）以及卟啉染料制成，其电容约为1.04 mF。该器件在模拟太阳光照下充电至 430 mV（开路电压），并且能够在黑暗中存储电荷超过 10 分钟。对染料浓度的进一步研究揭示了染料与导电聚合物之间的比例对于优化器件的光电压和电容的重要性。此外，还通过使用钌(Ru)基染料研究了染料材料的效果。使用 Ru 染料的器件显示出 198 mV 的光伏电压和超过 2 小时的电荷稳定性。 (C) 2014 Elsevier B.V. 保留所有权利。
In most applications an energy storage device is required when solar cells are applied for energy harvesting. In this work, we have demonstrated that composite films of a conducting polymer and a dye can be used as photoactive electrodes in an electrochemical cell for concurrent solar energy conversion and charge storage. A device was made of poly ethylenedioxythiophene:polystyrene sulfonate and (PEDOT:PSS) and a porphyrin dye which showed a capacitance of similar to 1.04 mF. The device was charged up to 430 mV (open circuit voltage) under a solar simulated illumination and was able to store the charge for more than 10 min in the dark. Further study on the concentration of the dye revealed the importance of the ratio between the dye and the conducting polymer to optimize the photovoltage and capacitance of the device. Also, the effect of the dye material was studied by using a Ruthenium (Ru) based dye. The device with the Ru dye showed a photovolatge of 198 mV and charge stability of more than 2 h. (C) 2014 Elsevier B.V. All rights reserved.