Iron pyrite thin film counter electrodes for dye-sensitized solar cells: high efficiency for iodine and cobalt redox electrolyte cells.
Iron pyrite thin film counter electrodes for dye-sensitized solar cells: high efficiency for iodine and cobalt redox electrolyte cells.
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DOI：
10.1021/nn5040982
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发表时间：
2014-09
期刊：
影响因子：
17.1
通讯作者：
Sudhanshu Shukla;N. H. Loc;P. Boix;T. Koh;R. Prabhakar;H. K. Mulmudi;Jun Zhang;Shi Chen;C. F. N
中科院分区：
文献类型：
--
作者：
Sudhanshu Shukla;N. H. Loc;P. Boix;T. Koh;R. Prabhakar;H. K. Mulmudi;Jun Zhang;Shi Chen;C. F. N
由于其光学性质和丰富度，黄铁矿一直是太阳能界感兴趣的材料。然而，由于缺乏对黄铁矿表面和内在化学的控制，这一进展受到了影响。在这份报告中，我们展示了黄铁矿作为一种有效的反电极（CE）材料替代传统的铂和聚（3，4-乙撑二氧噻吩（PEDOT）CEs在染料敏化太阳能电池（DSSC）。通过喷雾热解制备的黄铁矿膜CE用于I3（-）/I（-）和Co（III）/Co（II）电解质介导的DSSC。从循环伏安法和交流阻抗谱研究，发现催化活性与Pt和PEDOT在I3（-）/I（-）和Co（III）/Co（II）电解质，分别。使用I3（-）/I（-）电解质，发现黄铁矿CE的光转化效率为8.0%，Pt的光转化效率为7.5%，而使用Co（III）/Co（II）氧化还原DSSC，发现效率相同对于黄铁矿和PEDOT（6.3%）。黄铁矿CE在两种体系中的优异性能使其成为所研究的各种CE材料中的独特选择。
Iron pyrite has been the material of interest in the solar community due to its optical properties and abundance. However, the progress is marred due to the lack of control on the surface and intrinsic chemistry of pyrite. In this report, we show iron pyrite as an efficient counter electrode (CE) material alternative to the conventional Pt and poly(3,4-ethylenedioxythiophene (PEDOT) CEs in dye-sensitized solar cells (DSSCs). Pyrite film CEs prepared by spray pyrolysis are utilized in I3(-)/I(-) and Co(III)/Co(II) electrolyte-mediated DSSCs. From cyclic voltammetry and impedance spectroscopy studies, the catalytic activity is found to be comparable with that of Pt and PEDOT in I3(-)/I(-) and Co(III)/Co(II) electrolyte, respectively. With the I3(-)/I(-) electrolyte, photoconversion efficiency is found to be 8.0% for the pyrite CE and 7.5% for Pt, whereas with Co(III)/Co(II) redox DSSCs, efficiency is found to be the same for both pyrite and PEDOT (6.3%). The excellent performance of the pyrite CE in both the systems makes it a distinctive choice among the various CE materials studied.