https://scholars.lib.ntu.edu.tw/handle/123456789/502507
Title: | A counter electrode based on hollow spherical particles of polyaniline for a dye-sensitized solar cell | Authors: | Huang, Kuan-Chieh Hu, Chih-Wei Tseng, Chen-Ya Liu, Chen-Yu Yeh, Min-Hsin Wei, Hung-Yu Wang, Chun-Chieh Vittal, R. Chu, Chih-Wei KUO-CHUAN HO HUNG-YU WEI |
Issue Date: | 2012 | Journal Volume: | 22 | Journal Issue: | 29 | Start page/Pages: | 14727-14733 | Source: | Journal of Materials Chemistry | Abstract: | 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 cm 2, compared to that of the PANI film (A = 0.126 cm 2), 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 (I 3 -) 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. © 2012 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/502507 | ISSN: | 0959-9428 | DOI: | 10.1039/c2jm32316h | SDG/Keyword: | Active surface area; Catalytic layers; Counter electrodes; Dye-Sensitized solar cell; Dye-sensitized solar cells; Electrochemical impedance; Field emission scanning electron microscopy; Hollow spherical particles; ITO/glass substrates; Photovoltaic; Power conversion efficiencies; Rotating disk electrodes; Voltammetric; Conversion efficiency; Enamels; High resolution transmission electron microscopy; Photoelectrochemical cells; Photoelectrons; Platinum; Polyaniline; Rotating disks; X ray diffraction analysis; X ray photoelectron spectroscopy; Solar cells |
Appears in Collections: | 電機工程學系 |
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