Improve the open-circuit voltage of ZnO solar cells with inserting ZnS layers by two ways
Improve the open-circuit voltage of ZnO solar cells with inserting ZnS layers by two ways
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通过两种方式提高插入ZnS层的ZnO太阳能电池的开路电压
DOI：
10.1016/j.jssc.2013.02.006
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发表时间：
2013-04
影响因子：
3.3
通讯作者：
Hang Song
中科院分区：
文献类型：
--
作者：
Ming Gao;Zhiqiang Zhang;Zhe Wang;Hang Song
采用两种不同的方法在纳米氧化锌衬底上制备了纳米锌纳米颗粒薄膜。一种是旋涂法，另一种是连续离子层吸附反应(SILAR)法。用X射线衍射仪、X射线光电子能谱和紫外可见光谱仪对所制备的纳米氧化锌纳米颗粒进行了表征，并用扫描电子显微镜和透射电子显微镜对其形貌和厚度进行了表征。以纳米硫化锌/纳米硫化锌复合材料为光阳极，制备了硫化镉量子点敏化太阳能电池，并用J-V曲线研究了其光伏特性。结果表明，SILAR法比旋涂法更有利于延缓电子向硫化镉和电解液的反向转移。通过SILAR方法引入一层硫化锌，使开路电压提高到0.59V。在纳米氧化锌衬底上沉积纳米硫化锌薄膜10次后，电池的∼转换效率提高了3.3倍。
ZnS NPs layers were deposited on ZnO NRs by two different ways. One is spin coating; the other is successive ionic layer adsorption and reaction (SILAR) method. The ZnO NRs/ZnS NPs composites were verified by X-ray diffraction, X-ray photoelectron spectroscopy, and UV–visible spectrophotometer; their morphologies and thicknesses were examined by scanning electron microscopic and transmission electron microscopic images. The CdS quantum dot sensitized solar cells (QDSSCs) were constructed using ZnO NRs/ZnS NPs composites as photoanode and their photovoltaic characteristic was studied by J–V curves. The results indicated that the way of SILAR is more beneficial for retarding the back transfer of electrons to CdS and electrolyte than spin coating method. The open-circuit voltage increased to 0.59V by introducing a ZnS layer through SILAR method. When ZnS NPs layer was deposited for 10 times on ZnO NRs, the conversion efficiency of QDSSC shows ∼3.3 folds increments of as-synthesized ZnO solar cell.
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