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首页> 外文期刊>Applied Nanoscience >TiO2 photoanode sensitized with nanocrystalline Bi2S3: the effect of sensitization time and annealing on its photovoltaic performance
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TiO2 photoanode sensitized with nanocrystalline Bi2S3: the effect of sensitization time and annealing on its photovoltaic performance

机译：纳米Bi2S3敏化的TiO2光电阳极：敏化时间和退火对其光电性能的影响

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摘要

This work deals with the sensitization of the porous TiO2 films of thickness about 4 μm deposited on fluorine-doped tin oxide with nanocrystalline Bi2S3 for photovoltaic application. The sensitization was achieved for four different sensitization times employing chemical solution deposition with bismuth nitrate and sodium thiosulphate as precursors for Bi3+ and S2?, respectively. The unsensitized and sensitized photoelectrodes were characterized using X-ray diffractometry, scanning electron microscopy and diffused reflectance spectroscopy. XRD patterns show the signatures of both anatase TiO2 and orthorhombic Bi2S3 in the sensitized photoanodes. However, crystallinity of Bi2S3 increased with increase in sensitization time from 10 to 40 min. The temporal effect of sensitization and annealing on the photovoltaic performance of the solar cells fabricated using four different photoelectrodes was studied using the photocurrent density versus photovoltage curves. Annealing apparently improved the photovoltaic performance of photoanodes. The best performance was obtained for cell fabricated using annealed TiO2/Bi2S3 photoanode after 30 min sensitization time showing V oc ~ 0.37 mV, J sc ~ 0.52 mA/cm2, FF ~ 68 and 0.43 %.
机译：这项工作处理了纳米掺杂的Bi 2 S 3 用于光伏应用。分别采用硝酸铋和硫代硫酸钠分别作为Bi 3 + 和S 2？的前体进行化学溶液沉积，在四种不同的敏化时间下实现了敏化。使用X射线衍射法，扫描电子显微镜和漫反射光谱法对未敏化和敏化的光电极进行表征。 X射线衍射图谱显示了敏化光阳极中锐钛矿型TiO 2 和正交晶Bi 2 S 3 的特征。然而，Bi 2 S 3 的结晶度随着敏化时间的增加从10分钟增加到40分钟。利用光电流密度与光电压的关系曲线研究了敏化和退火对使用四个不同光电极制造的太阳能电池的光伏性能的时间影响。退火明显改善了光阳极的光伏性能。经过30分钟的敏化时间显示V oc，使用TiO 2 / Bi 2 S 3 光电阳极制备的电池获得了最佳性能〜0.37 mV，J sc 〜0.52 mA / cm 2 ，FF〜68和0.43％。

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