...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science of advanced materials >Effect of Flower Extracts on the Optoelectronic Properties of Cd and Sn Doped TiO_2 Nanopowder
【24h】

Effect of Flower Extracts on the Optoelectronic Properties of Cd and Sn Doped TiO_2 Nanopowder

机译：花提取物对Cd和Sn掺杂TiO_2纳米粉体光电性质的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Studies on the optoelectronic properties of cadmium and tin doped TiO_2 nanopowder (P25, commercial powder, 25 nm in diameter and spherical shape) with and without extracts of various flowers viz. Calendula Orange (CO), Calendula Yellow (CY), Dahlia Yellow (DY), Sweet Poppy (SP), and their Mixed Extract (ME) are presented here. Cd and tin were doped with TiO_2 using hydrothermal method. Samples were analyzed by using UV-Vis, FTIR, FESEM, XRD, and Raman spectroscopy for elemental, structural and morphological observations. Thick films of these powder were printed using conventional screen printing method on fluorine doped tin oxide (FTO) substrate with organic binders and dried at 45 ℃. The photoconduction properties are investigated as a function of wavelength from ultra-violet (UV) to infra-red (IR) region at constant illumination intensity. Irradiation from UV to IR region results in gradual reduction in photocurrent. Doping with tin resulted in improved photoconductance than cadmium, which is related to the changes in band gap. Addition of colour pigments (flower extracts) further improved the photoconductance over larger spectrum. Highest photoconductance is observed in case of DY flower extracts. Anthocyanins are known for their antioxidative properties and hence can contribute in the photoconduction via reduction of surface adsorbed oxygen in visible and IR regions. This investigation suggests the potential use of flower extract for dye sensitized solar cell (DSSC) based on composite metal oxides.
机译：含和不含各种花提取物的镉和锡掺杂的TiO_2纳米粉（P25，市售粉末，直径25 nm，球形）的光电性能研究。这里介绍了金盏花橙（CO），金盏花黄（CY），大丽花黄（DY），甜罂粟（SP）及其混合提取物（ME）。采用水热法将Cd和锡掺杂TiO_2。使用UV-Vis，FTIR，FESEM，XRD和拉曼光谱分析样品，以进行元素，结构和形态观察。使用常规的丝网印刷方法将这些粉末的厚膜印刷在带有有机粘合剂的氟掺杂氧化锡（FTO）基板上，并在45℃下干燥。研究了在恒定照明强度下，从紫外线（UV）到红外（IR）区域的波长随波长变化的光电导特性。从紫外线照射到红外线区域会导致光电流逐渐减小。掺杂锡比镉提高了光电导，这与带隙的变化有关。添加彩色颜料（花提取物）可进一步改善较大光谱范围内的光电导。在DY花提取物中观察到最高的光电导。花青素因其抗氧化性能而闻名，因此可通过减少可见光区和IR区的表面吸附氧来促进光电导。这项研究表明花提取物可用于基于复合金属氧化物的染料敏化太阳能电池（DSSC）。

著录项

  • 来源
    《Science of advanced materials》 |2012年第7期|p.763-770|共8页
  • 作者

    S. G. Ansari; Ahmad Umar; A. Al-Hajry; Salem S. Al-Deyab; Z. A. Ansari;

  • 作者单位

    Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia,New Delhi, 110025, India;

    Department of Chemistry, Faculty of Sciences and Arts,Promising Centre for Sensors and Electronic Devices (PCSED);

    Promising Centre for Sensors and Electronic Devices (PCSED),Department of Physics, Faculty of Sciences and Arts, Najran University,P. O. Box 1988, Najran-11001, Kingdom of Saudi Arabia;

    Petrochemical Research Chair, Chemistry Department, College of Science,King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;

    Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia,New Delhi, 110025, India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DSSC; doped TiO_2:photoconduction; optical properties; flower extract;

    机译：DSSC;掺杂TiO_2：光电导;光学性质花提取物;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号