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首页> 外文期刊>Journal of Sol-Gel Science and Technology >Magnesium doped ZnO nanoparticles embedded ZnO nanorod hybrid electrodes for dye sensitized solar cells
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Magnesium doped ZnO nanoparticles embedded ZnO nanorod hybrid electrodes for dye sensitized solar cells

机译：镁掺杂的ZnO纳米粒子嵌入的ZnO纳米棒混合电极，用于染料敏化太阳能电池

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摘要

We report a novel type of Mg doped ZnO nanoparticles (ZMP) embedded on hydrothermally grown ZnO nanorod (ZR) based photoanode dye sensitized solar cells. The crystallinity, composition and morphology of the photoanodes were characterized by using X-ray diffraction analysis, X-ray photoelectron spectroscopy and scanning electron microscopy. The amount of dye absorbed in the photoanode was observed using UV visible spectral analysis. The improved internal resistance and charge-transfer kinetics of the fabricated cells were analyzed using electrochemical impedance spectroscopy. The ZMP embedded electrode of low thickness (～2.5 μm) gained an enhanced short-circuit current density of 8.56 mA/cm~2 , open-circuit photo voltage of 0.71 V, fill factor of 0.51, and overall conversion efficiency of 2.91 % under 1 sun illumination. This shows high conversion efficiency and performance than that of ZnO nanorod (η ～ 0.22 %) and bare ZnO nanoparticles (ZP) embedded ZnO nanorod (η ～ 1.04 %) based cells. The presence of Mg ions in the ZnO nano-particle hinders the interfacial recombination of the photo-excited electrons with the electrolyte and also shows better dye absorption than that of ZR. These factors can significantly enhance solar-cell performance and increase the efficiency of the ZMP based dye sensitized solar cells.
机译：我们报告一种新型的Mg掺杂的ZnO纳米颗粒（ZMP）嵌入基于水热生长的ZnO纳米棒（ZR）的光阳极染料敏化太阳能电池上。用X射线衍射分析，X射线光电子能谱和扫描电子显微镜对光阳极的结晶度，组成和形貌进行了表征。使用紫外可见光谱分析观察在光阳极中吸收的染料量。使用电化学阻抗谱分析了所制造电池的改进的内部电阻和电荷转移动力学。低厚度（〜2.5μm）的ZMP埋入电极在短路条件下的短路电流密度提高到8.56 mA / cm〜2，开路光电压为0.71 V，填充系数为0.51，总转换效率为2.91％ 1个阳光照射。这显示出比ZnO纳米棒（η〜0.22％）和裸露的ZnO纳米粒子（ZP）嵌入的ZnO纳米棒（η〜1.04％）高的转换效率和性能。 ZnO纳米粒子中Mg离子的存在阻碍了光激发电子与电解质的界面复合，并且比ZR具有更好的染料吸收能力。这些因素可以显着提高太阳能电池的性能，并提高基于ZMP的染料敏化太阳能电池的效率。

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