The photoelectric performance of dye-sensitized solar cells fabricated by assembling pigment-protein complexes of purple bacteria on nanocrystalline photoelectrode
The photoelectric performance of dye-sensitized solar cells fabricated by assembling pigment-protein complexes of purple bacteria on nanocrystalline photoelectrode
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DOI：
10.1016/j.matlet.2014.05.054
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发表时间：
2014-08-15
影响因子：
3
通讯作者：
Wu, Jihuai
中科院分区：
文献类型：
--
作者：
Fu, Qiaoming;Zhao, Chungui;Wu, Jihuai
从两种典型的紫色细菌中获得了四种具有近红外吸收的色素-蛋白质复合体(PPC，两种类型的LH2，LH4和RC)，并将它们组装在二氧化钛薄膜光阳极上，制备了具有可见光-近红外响应的染料-蛋白质复合体。在72 h内，LH2在TiO2膜上的饱和吸附量为0.146 mgBCHL cm(-2)，当最佳浓度为46.8mgBCHL-1LH2时，其短路电流(I-sc)和光电转换效率(ETa)分别达到1.46 mA cm(-2)和0.49%，约为LHC基光敏化电池的2倍。RC敏化的dsc达到1.24 mA cm(-2)(i-sc)和0.57%(Eta)，比其他RC光伏电池高出三个数量级以上。此外，在光和暗交替的几个周期后，光电流响应保持稳定。结果表明，聚碳酸酯有望成为制备可见光-近红外响应型染料敏化材料的天然增敏剂。该研究为开发多功能的仿生能量转换器或光电传感器提供了新的策略。(C)2014爱思唯尔B.V.保留所有权利。
Four pigment-protein complexes (PPCs, two types of LH2, LH4 and RC) with near-infrared absorbance were obtained from two typical purple bacteria, and were used to fabricate the visible-NIR responsive DSSC by assembling them on TiO2 film photoanodes. The saturation adsorption quantity of LH2 on TiO2 film was 0.146 mu g BChl cm(-2) in 72 h. The short current (I-sc) and photoelectric conversion efficiency (eta) of DSSC with LH2 sensitized-TiO2 reached 1.46 mA cm(-2) and 0.49% at the optimal concentration of 46.8 mu g BChl ml(-1) LH2, respectively, which are approximately two folds higher than those of LHC-based DSSC to date. The RC-sensitized DSSC reached 1.24 mA cm(-2) (I-sc) and 0.57% (eta), which are over three orders of magnitude higher than any other RC-based photovoltaic cells so far. Moreover, the photocurrent response remained stable after several cycles of alternating light and darkness. The results suggested that PPCs could be promising natural sensitizer candidates for fabricating visible-NIR responsive DSSC. And this study provided a new strategy for developing versatile biomimetic energy convertors or photoelectric sensors. (C) 2014 Elsevier B.V. All rights reserved.