以四氯化钛、盐酸为原料,制备出花状TiO_2纳米微球,利用扫描电子显微镜(SEM)、X射线衍射(XRD)等测试方法,对样品的结构和形貌进行了表征。为了提高TiO_2微球电池的光电性能,利用TiO_2微球作为反射层构造了双层结构的薄膜电极,结果表明,...以四氯化钛、盐酸为原料,制备出花状TiO_2纳米微球,利用扫描电子显微镜(SEM)、X射线衍射(XRD)等测试方法,对样品的结构和形貌进行了表征。为了提高TiO_2微球电池的光电性能,利用TiO_2微球作为反射层构造了双层结构的薄膜电极,结果表明,双层结构染料敏化太阳能电池在100 m W·cm-2(1.5 G)光照条件下,短路光电流Jsc=17.64 m A·cm-2,开路光电压Voc=0.74 V,填充因子FF=0.63和光电转化效率η=8.33%。相比TiO_2微球制备的太阳能电池,双层结构染料敏化太阳能电池光电转化效率提高至5.3倍。最后对电极中染料的吸附量、电极的光散射性能和电池的电化学阻抗做了进一步研究和分析,研究表明,双层结构电池增强光的捕获能力,从而提高光伏性能。展开更多
Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. I...Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. In this paper, we develop a kind of novel nanometer-sized fluorescent hybrid silica(NFHS) particles used as a sensitive and photostable fluorescent probe in biological staining and diagnostics. The NFHS particles are prepared by controlled hydrolysis of the fluorophore silica precursor using the reverse micelle technique. The fluorophores are dispersed homogeneously in the silica network of the NFHS particles and well protected from the environmental oxygen. In comparison with single organic fluorophores without incorporation, these nanoparticle probes are brighter, more stable against photobleaching and do not suffer from intermittent on/off light emission(blinking). The NFHS particles have also shown unique advantages over the existing common organic fluorophores, quantum dots, and latex-based fluorescent particles for biomolecule recognition in the following four major points: easy preparation, good photostability, high sensitivity, and low toxicity. The approach proposed in this article for making NFHS nanoparticles is a general one, and it is not restricted to a particular type of fluorophore molecule as selected in this study.展开更多
文摘以四氯化钛、盐酸为原料,制备出花状TiO_2纳米微球,利用扫描电子显微镜(SEM)、X射线衍射(XRD)等测试方法,对样品的结构和形貌进行了表征。为了提高TiO_2微球电池的光电性能,利用TiO_2微球作为反射层构造了双层结构的薄膜电极,结果表明,双层结构染料敏化太阳能电池在100 m W·cm-2(1.5 G)光照条件下,短路光电流Jsc=17.64 m A·cm-2,开路光电压Voc=0.74 V,填充因子FF=0.63和光电转化效率η=8.33%。相比TiO_2微球制备的太阳能电池,双层结构染料敏化太阳能电池光电转化效率提高至5.3倍。最后对电极中染料的吸附量、电极的光散射性能和电池的电化学阻抗做了进一步研究和分析,研究表明,双层结构电池增强光的捕获能力,从而提高光伏性能。
文摘Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. In this paper, we develop a kind of novel nanometer-sized fluorescent hybrid silica(NFHS) particles used as a sensitive and photostable fluorescent probe in biological staining and diagnostics. The NFHS particles are prepared by controlled hydrolysis of the fluorophore silica precursor using the reverse micelle technique. The fluorophores are dispersed homogeneously in the silica network of the NFHS particles and well protected from the environmental oxygen. In comparison with single organic fluorophores without incorporation, these nanoparticle probes are brighter, more stable against photobleaching and do not suffer from intermittent on/off light emission(blinking). The NFHS particles have also shown unique advantages over the existing common organic fluorophores, quantum dots, and latex-based fluorescent particles for biomolecule recognition in the following four major points: easy preparation, good photostability, high sensitivity, and low toxicity. The approach proposed in this article for making NFHS nanoparticles is a general one, and it is not restricted to a particular type of fluorophore molecule as selected in this study.
