杂化金属氧化物半导体作为染料敏化太阳能电池光阳极的光伏研究

Vindhya Hegde, T. S. Nivin, S. Sreeja, S. Gopalan, C. O. Sreekala
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引用次数: 5

摘要

染料敏化太阳能电池(DSSCs)自1991年问世以来,由于其与传统硅太阳能电池相比制备工艺简单且环保,一直吸引着全球的研究人员。大多数情况下,金属氧化物半导体的最佳选择是TiO2,因为它具有较高的电子注入率。但另一方面,像ZnO这样的宽带隙半导体具有更高的稳定性和电子迁移率。我们预计这两者的结合将有助于我们获得更好的设备。在本研究中,使用杂化金属氧化物对工作电极进行修饰,以提高器件的效率。采用溶胶-凝胶法制备了ZnO纳米颗粒。用SEM分析了ZnO的形貌、孔隙率和晶粒尺寸。通过XRD分析进一步确定了其粒度。将块体和纳米TiO2分别与纳米ZnO混合,并对其光伏参数进行了测试。使用的组合分别为(i) TiO2-n (ii) TiO2-b (iii) ZnO-n (iv) TiO2-n: TiO2-b (v) ZnO-n: TiO2-n (1:1) (vi) ZnO-n:TiO2-b(1:1)和N719染料。在组装电极后,评估了每种组合的电流密度-电压特性。结果表明,纳米tio2与体块成分以1:1的比例组合效果最佳。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photovoltaic studies of hybrid metal oxide semiconductors as photo anode in dye sensitized solar cells
Dye sensitized solar cells (DSSCs) have fascinated researchers across the globe since their inception in 1991, due to their easy preparation protocols compared to the conventional silicon solar cells and eco-friendly nature. Most of the time best choice of metal oxide semiconductor is TiO2 because of its high electron injection rate. But on the other hand, wide band gap semiconductor such as ZnO has higher stability and electron mobility. We anticipated that combination of these two should help us to get the better devices. In this study, working electrode modification was done by using hybrid metal oxides as in the fabrication of DSSC to increase the efficiency of the device. ZnO nanoparticles were synthesized by sol-gel process. The morphology, porosity and grain size of the ZnO was studied by SEM analysis. The Particle size was further confirmed by XRD analysis. Bulk and nano TiO2 were blended individually with nano ZnO and their photo voltaic parameters were examined. Used combinations were (i) TiO2-n (ii) TiO2-b (iii) ZnO-n (iv) TiO2-n: TiO2-b in 1:1 ratio (v) ZnO-n: TiO2-n in 1:1 ratio (vi) ZnO-n:TiO2-b in 1:1 ratio respectively along with N719 dye. After assembling the electrodes, the current density-voltage characteristics of each of the combinations were evaluated. It was found that among all the combinations TiO2nano and bulk composition in the proportion 1:1 is showing the optimum efficiency than the other compositions.
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