Nanographite/polyaniline composite films as the counter electrodes for dye-sensitized solar cells
Nanographite/polyaniline composite films as the counter electrodes for dye-sensitized solar cells
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DOI：
10.1039/c1jm10576k
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发表时间：
2011-07
影响因子：
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通讯作者：
Kuan-Chieh Huang;Jen-Hsien Huang;Chia-Hui Wu;Chen-yu Liu;Hsin-Wei Chen;C. Chu;Jiann T. Lin;Cheng-Lan Lin;K. Ho
中科院分区：
文献类型：
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作者：
Kuan-Chieh Huang;Jen-Hsien Huang;Chia-Hui Wu;Chen-yu Liu;Hsin-Wei Chen;C. Chu;Jiann T. Lin;Cheng-Lan Lin;K. Ho
制备了纳米石墨/聚苯胺（NG/PANI）复合薄膜并对其进行了表征，对其作为对电极的染料敏化太阳能电池（DSSCs）的性能进行了评价。采用回流法制备了纳米石墨/苯胺（NG/ANI）颗粒，并将其作为纳米石墨/苯胺复合膜的电聚合单体。通过EDX作图、TEM图像、ζ电位和UV-Vis吸收测量证实了ANI对NG的表面改性。采用拉曼光谱、XPS和导电原子力显微镜对电聚合的NG/PANI复合膜进行了表征，证实了NG在PANI膜中的成功掺入。利用扫描电化学显微镜（SECM）的正反馈模式对NG/PANI复合膜的电催化活性进行了评价，得到了二茂铁/二茂铁（Fc/Fc+）氧化还原对的非均相速率常数（k50），并与溅射Pt的非均相速率常数进行了比较。采用NG/PANI (20 mC cm−2)CE的DSSC表现出更高的短路电流密度（JSC）和更低的填充因子（FF）。与含有溅射Pt CE的DSSC （η = 7.19%）相比，其功率转换效率（η）为7.07%。
Nanographite/polyaniline (NG/PANI) composite films were developed and characterized, and the performances of the dye-sensitized solar cells (DSSCs) employing these composite films as the counter electrode (CE) were evaluated in this study. The nanographite/aniline (NG/ANI) particle was firstly synthesized by a reflux method and served as the monomer for the electro-polymerization of the NG/PANI composite films. The surface modification of NG by ANI was confirmed by EDX mapping, TEM image, zeta-potential, and UV-Vis absorption measurements. The electro-polymerized NG/PANI composite films were characterized by Raman spectroscopy, XPS, and conducting-AFM, which verified the successful incorporation of NGs in the PANI films. The electro-catalytic activity of the NG/PANI composite film was evaluated using the positive-feedback mode of scanning electrochemical microscopy (SECM), by which a comparable heterogeneous rate constant (ks0) for the ferrocene/ferrocenium (Fc/Fc+) redox pair was obtained and compared with that of a sputtered Pt. The DSSC employing the NG/PANI (20 mC cm−2) CE exhibited a higher short-circuit current density (JSC) but lower fill factor (FF), and gave a comparable power-conversion efficiency (η) of 7.07%, as compared to that of a DSSC containing a sputtered Pt CE (η = 7.19%).