標題: | A counter electrode based on hollow spherical particles of polyaniline for a dye-sensitized solar cell |
作者: | 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 Ho, Kuo-Chuan 光電工程學系 Department of Photonics |
公開日期: | 2012 |
摘要: | 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 (h) 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 h 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. |
URI: | http://hdl.handle.net/11536/16562 |
ISSN: | 0959-9428 |
期刊: | JOURNAL OF MATERIALS CHEMISTRY |
Volume: | 22 |
Issue: | 29 |
結束頁: | 14727 |
顯示於類別: | 期刊論文 |