A counter electrode based on hollow spherical particles of polyaniline for a dye-sensitized solar cell
A counter electrode based on hollow spherical particles of polyaniline for a dye-sensitized solar cell
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DOI：
10.1039/c2jm32316h
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发表时间：
2012-07
影响因子：
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通讯作者：
Kuan-Chieh Huang;Chih-Wei Hu;Chen-Ya Tseng;Chen-yu Liu;Min-Hsin Yeh;Hung-Yu Wei;Chunchun Wang
中科院分区：
文献类型：
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作者：
Kuan-Chieh Huang;Chih-Wei Hu;Chen-Ya Tseng;Chen-yu Liu;Min-Hsin Yeh;Hung-Yu Wei;Chunchun Wang
合成了空心球形聚苯胺（hsPANI）颗粒，并将其沉积在ITO/玻璃衬底上，为染料敏化太阳能电池（DSSC）制备了对电极（指定为hsPANI- ce）。采用高分辨率透射电子显微镜（HR-TEM）、场发射扫描电子显微镜（FE-SEM）、x射线衍射仪（XRD）、x射线光电子能谱（XPS）和拉曼光谱对hsPANI颗粒的结构和结晶进行了表征。采用hsPANI-CE的DSSC的功率转换效率（η）为6.84%，而采用原始PANI（称为PANI-CE）作为CE的DSSC的功率转换效率为6.02%。这种增强归因于hsPANI膜的活性表面积(a)为0.191 cm2，而PANI膜的活性表面积（a = 0.126 cm2）更大，这两个值都是通过旋转圆盘电极（RDE）估计的。循环伏安（CV）曲线证明了hsPANI-CE对三碘离子（I3−）还原的电催化能力高于PANI-CE。作为参考，带有pt溅射CE的DSSC的η值为7.17%。电化学阻抗光谱（EIS）证实了光电行为。结果表明，由hsPANI颗粒组成的薄膜可以作为替代Pt在DSSC CE中的潜在催化层。
Hollow spherical polyaniline (hsPANI) particles are synthesized and deposited on an ITO/glass substrate to prepare a counter electrode (designated as hsPANI-CE) for a dye-sensitized solar cell (DSSC). The structure and crystallization of the hsPANI particles are characterized by using high resolution transmission electron microscopy (HR-TEM), field-emission scanning electron microscopy (FE-SEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectra. A power-conversion efficiency (η) of 6.84% is obtained for the DSSC with the hsPANI-CE, while it is 6.02% in the case of the DSSC with a CE based on pristine PANI (designated as PANI-CE). Such enhancement is attributed to the hsPANI film having a larger active surface area (A) of 0.191 cm2, compared to that of the PANI film (A = 0.126 cm2), both values being estimated by a rotating disk electrode (RDE). Cyclic voltammetric (CV) curves have evidenced that the electro-catalytic ability of the hsPANI-CE for the reduction of tri-iodide (I3−) ions is higher than that of the PANI-CE. As a reference, the DSSC with a Pt-sputtered CE gives an η of 7.17%. Electrochemical impedance spectroscopic (EIS) spectra are used to substantiate the photovoltaic behaviors. The results suggest that the film consisting of hsPANI particles can be a potential catalytic layer for the replacement of Pt in the CE of a DSSC.