In this work, ZnO/SiO2 nanoparticles were prepared using sol-gel method, and platinum particles were loaded on ZnO/SiO2 nanoparticles by photoreductive method. Samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). The XRD patterns showed that the zinc oxide samples have a wurtzite structure (hexagonal phase...

在Si衬底上制备的Cu2ZnSnS4(CZTS)太阳能电池具有CZTS与Si衬底的晶格失配低的优点, 但目前其转换效率仍较低. 本文采用异质结太阳能电池仿真软件Afors-het对Si衬底CZTS太阳能电池进行数值计算. 对现有的p-CZTS/n-Si太阳能电池的计算结果表明, 在该电池结构中p-CZTS和n-Si分别起窗口层和吸收层的作用, 但p-CZTS具有高光吸收系数, 使大部分入射光无法透过p-CZTS层进而被n-Si吸收, 限制了电池的转换效率. 本文提出以p-Si作为衬底的n-ZnO:Al/i-ZnO/n-CdS/p-CZTS/p-Si太阳能电池结构. 计算得到的p-CZTS/p-Si结构的暗态电流密度-电压(J–V)特性曲线均为线性曲线, 表明p-CZTS与p-Si为欧姆接触以及p-Si作为p-CZTS的背电极的...

nanostructured zinc oxide (zno) materials have received considerable interest from scientists due to their remarkable performance in electronics, optics and photonics. zno nanoparticles were synthesized by co-precipitation method. zno nanoparticles were synthesized using zn(no3)3 and k2co3 precursors. the structure of the obtained product was confirmed by the powder x-ray diffraction (xrd) anal...

zinc oxide (zno) nanopowders were synthesized by the sol–gel method from an ethanol solution of zinc sulfate heptahydrate in the presence of diethylene glycol surfactant. detailed structural and microstructural investigations were carried out using x-ray diffraction (xrd), high-resolution transmission electron microscopy (hrtem), field emission scanning electron microscopy (fe-sem), fourier tra...

In this study, by taking the advantage of both inorganic ZnO nanoparticles and the organic material chitosan as a composite seed layer, we have fabricated well-aligned ZnO nanorods on a gold-coated glass substrate using the hydrothermal growth method. The ZnO nanoparticles were characterized by the Raman spectroscopic techniques, which showed the nanocrystalline phase of the ZnO nanoparticles. ...

Green synthesis of Zinc oxide nanoparticles (ZnO Nps) was carried out using the aqueous extract of green tea (Camellia sinensis) leaves. The UV-Vis spectrum was recorded to monitor the formation of the nanoparticles, which exhibited a blue shifted absorption peak at 325 nm. The XRD pattern revealed well-defined peaks appearing at 2θ positions corresponding to the hexagonal wurtzite structure of...

Sulfur kesterite (CZTS) solar cells on transparent substrate (FTO) showing η = 7.3% and Voc 700 mV (structure: SLG/FTO/Mo (20 nm)/CZTS/Al2O3/CdS/i-ZnO/ITO) 7.7% 677 nm)/CZTS/CdS/i-ZnO/ITO).

Ultrafast interfacial electron transfer in sensitized solar cells has mostly been probed by visible-to-terahertz radiation, which is sensitive to the free carriers in the conduction band of the semiconductor substrate. Here, we demonstrate the use of deep-ultraviolet continuum pulses to probe the interfacial electron transfer, by detecting a specific excitonic transition in both N719-sensitized...