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Development of MoSe 2 /PANI composite nanofibers as an alternative to Pt counter electrode to boost the photoconversion efficiency of dye sensitized solar cell
Journal of Solid State Electrochemistry ( IF 2.5 ) Pub Date : 2020-06-29 , DOI: 10.1007/s10008-020-04728-6
E. S. Sowbakkiyavathi , Vignesh Murugadoss , Ramadasse Sittaramane , Subramania Angaiah

In this work, a simple hydrothermally prepared molybdenum diselenide (MoSe2) was mixed with polyaniline (PANI) nanofibers at 1:1 Wt% in deionized water by using an ultrasonicator for few minutes and then filtered and dried at 100 °C to get MoSe2/PANI composite nanofibers to use as a counter electrode (CE) for high-performance dye-sensitized solar cell (DSSC). The X-ray diffractometer (XRD) result confirms the formation of MoSe2/PANI composite nanofibers with high purity, which is consistent with the result of Raman spectrum. Field emission scanning electron microscopy (FE-SEM) studies confirm the decoration of MoSe2 nanoparticles onto the surface of polyaniline nanofibers and their chemical composition was calculated by energy-dispersive X-ray spectroscopy (EDX). The cyclic voltammetry (CV) study shows that MoSe2/PANI composite nanofibers as CE have good electrocatalytic activity, fast electron transport rate with increased current flow than the individual MoSe2 and PANI CEs. From AC-impedance analysis, it is cleared that MoSe2/PANI composite nanofibers based CE have lower charge-transfer resistance (Rct) with higher electrocatalytic behavior for I3/I redox pair than the pure MoSe2, PANI, and Pt-based CEs. Moreover, MoSe2/PANI composite nanofibers based DSSC show higher cell efficiency of 8.04% than the pure MoSe2, PANI, and Pt-based DSSCs. It revealed that MoSe2/PANI CE could be used as a promising candidate for DSSC.



中文翻译:

MoSe 2 / PANI复合纳米纤维的开发,以替代Pt对电极,以提高染料敏化太阳能电池的光转换效率

在这项工作中,使用超声仪将简单的水热制备的二硒化钼(MoSe 2)与聚苯胺(PANI)纳米纤维在去离子水中以1:1 Wt%的比例混合几分钟,然后过滤并在100°C干燥以获得MoSe 2 / PANI复合纳米纤维,用作高性能染料敏化太阳能电池(DSSC)的对电极(CE)。X射线衍射仪(XRD)的结果证实了高纯度的MoSe 2 / PANI复合纳米纤维的形成,这与拉曼光谱的结果是一致的。场发射扫描电子显微镜(FE-SEM)研究证实了MoSe 2的装饰聚苯胺纳米纤维表面上的纳米颗粒及其化学组成通过能量色散X射线光谱(EDX)计算。循环伏安法(CV)研究表明,与单独的MoSe 2和PANI CE相比,作为CE的MoSe 2 / PANI复合纳米纤维具有良好的电催化活性,快速的电子传输速率和增加的电流。从AC阻抗分析,它被清零该摩西2基于/聚苯胺复合纳米纤维CE具有较低的电荷转移阻力([R CT)具有更高的电催化行为用于I 3 - / I -氧化还原对比纯摩西2,PANI,和基于Pt的CE。此外,MoSe 2/ PANI复合纳米纤维的DSSC比纯MoSe 2,PANI和Pt的DSSC显示出8.04%的更高电池效率。结果表明,MoSe 2 / PANI CE可以作为DSSC的有希望的候选物。

更新日期:2020-06-29
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