Effect of annealing temperature and graphene concentrations on photovoltaic and NIR-detector applications of PbS/rGO nanocomposites
Effect of annealing temperature and graphene concentrations on photovoltaic and NIR-detector applications of PbS/rGO nanocomposites
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DOI：
10.1016/j.ceramint.2016.06.155
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发表时间：
2016-11
影响因子：
5.2
通讯作者：
R. Yousefi;M. Mahmoudian;Abdolhosain Sa΄aedi;M. Cheraghizade;F. Jamali-Sheini;M. Azarang
中科院分区：
文献类型：
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作者：
R. Yousefi;M. Mahmoudian;Abdolhosain Sa΄aedi;M. Cheraghizade;F. Jamali-Sheini;M. Azarang
研究了退火温度对PbS纳米颗粒（NPs）和PbS/石墨烯纳米复合材料的光伏和近红外（NIR）探测器应用的影响。产物通过简单的共沉淀法合成，并且使用氧化石墨烯（GO）片作为石墨烯源。使用几种表征技术来显示在合成过程期间GO转移到还原的氧化石墨烯（rGO）中。此外，石墨烯浓度对样品的形态，结构，光伏和检测器参数的影响进行了研究。透射电子显微镜（TEM）结果表明，在H2/Ar气氛下退火后，PbS纳米颗粒团聚，而PbS/rGO纳米复合材料完全分散。紫外-可见分光光度计显示所有样品在电磁光谱的近红外红（NIR）区域都有吸收峰。结果表明，样品的光电流强度、样品对近红外光源的响应度和太阳能电池效率受到样品退火和石墨烯浓度的影响。
The effect of annealing temperature on photovoltaic and near-infrared (NIR) detector applications of PbS nanoparticles (NPs) and PbS/graphene nanocomposites was investigated. The products were synthesized by a simple co-precipitation method and graphene oxide (GO) sheets were used as graphene source. Several characterization techniques were used to show transfer of the GO into reduced graphene oxide (rGO) during the synthesis process. In addition, the effect of graphene concentrations on morphology, structure, photovoltaic, and detector parameters of the samples were studied. Transmission electron microscope (TEM) images showed that, the PbS NPs were agglomerated, while, the PbS/rGO nanocomposites were dispersed completely after annealing under H2/Ar gas atmosphere. UV–visible spectrometer showed an absorption peak for all samples in the near infrared red (NIR) region of the electromagnetic spectrum. The results indicated that, photocurrent intensity, responsivity of the samples to an NIR source, and solar-cell efficiency were affected by annealing of samples and graphene concentrations.