Alloying of platinum and molybdenum for transparent counter electrodes. A strategy of enhancing power output for bifacial dye-sensitized solar cells
Alloying of platinum and molybdenum for transparent counter electrodes. A strategy of enhancing power output for bifacial dye-sensitized solar cells
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DOI：
10.1039/c5ra04735h
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发表时间：
2015-06
期刊：
影响因子：
3.9
通讯作者：
Huihui Zhang;Q. Tang;B. He
中科院分区：
文献类型：
--
作者：
Huihui Zhang;Q. Tang;B. He
设计一种不牺牲光伏性能和功率输出的双面染料敏化太阳能电池（DSSC）的成本有效的对电极（CE）是光伏发电领域的一个长期目标。我们在这里提出了一种新的透明的二元Pt-Mo合金CE的双面DSSC应用的电化学策略的制造，目的是降低成本的太阳能到电力转换。通过调整Pt-Mo合金的化学计量来优化电化学性能，从而优化光伏性能。由于高的电荷转移能力，电催化活性，和光学透明度，最大的功率转换效率为6.75%和2.89%，分别记录下正面和背面照射，这是相当的6.74%和2.47%，从一个原始的铂电极为基础的太阳能电池。由于来自透明合金CE的光对来自阳极的入射光的补偿效应，太阳能电池的最大功率输出在同时照射下与两侧相比显著增强。沿着增强的效率以及增强的功率输出、快速启动、多次启动能力、简单的制备和低Pt剂量突出了这些具有成本效益的透明Pt-Mo合金CE在双面DSSC中的潜在应用。
Designing a cost-effective counter electrode (CE) with no sacrifice of photovoltaic performances and power output for a bifacial dye-sensitized solar cell (DSSC) is a persistent objective in photovoltaic power generation. We present here the fabrication of a novel transparent binary Pt-Mo alloy CE by an electrochemical strategy for bifacial DSSC application with an aim of bringing down the cost for solar-to-electric conversion. Electrochemical, and therefore photovoltaic performances, are optimized by adjusting stoichiometries of Pt-Mo alloys. Due to high charge-transfer ability, electrocatalytic activity, and optical transparency, maximum power conversion efficiencies of 6.75% and 2.89% are recorded under front and rear irradiation, respectively, which are comparable to 6.74% and 2.47% from a pristine Pt electrode-based solar cell. Due to the compensation effect of light from a transparent alloy CE to the incident light from the anode, the maximum power output of a solar cell has been markedly enhanced under simultaneous irradiation in comparison with either side. The enhanced efficiency along with enhanced power output, fast start-up, multiple start capability, simple preparation, and low Pt dosage highlights the potential application of these cost-effective transparent Pt-Mo alloy CEs in bifacial DSSCs.