Controlling Diameter, Length and Characterization of ZnO Nanorods by Simple Hydrothermal Method for Solar Cells

Abstract

Zinc oxide (ZnO) nanorods have been synthesized by solution processing hydrothermal method in low temperature using the spin coating technique. Zinc acetate dehydrate, Zinc nitrate hexahydrate and hexamethylenetetramine were used as a starting material. The ZnO seed layer was first deposited by spin coated of ethanol zinc acetate dehydrate solution on a glass substrate. ZnO nanorods were grown on the ZnO seed layer from zinc nitrate hexahydrate and hexamethylenetetramine solution, and their diameters, lengths were controlled by precursor concentration and development time. From UV-Visible spectrometry the optical band gap energy of ZnO nanorods was calculated to be 3.3 eV. The results of X-Ray Diffraction (XRD) showed the highly oriented nature of ZnO nanorods the hardest (002) peak reflects that c-axis elongated nanorods are oriented normal to the glass substrate. The Field Emission Scanning Electron Microscope (FESEM) was employed to measure both of average diameter of ZnO nanorods, Energy Dispersive X-Ray (EDX) is used to identify the elemental present and to determine the element composition in the samples.

Fabrication, characterization of ZnO nanorods on the flexible substrate (Kapton tape) via chemical bath deposition for UV photodetector applications

“…The dependence of the D value on the type of substrate can be attributed to both lattice and thermal mismatching between this substrate and ZnO nanorods. The amount of defect in crystal is represented the dislocation density (δ) is obtained by equation (6) [18]: (6) Where D is the crystallite size. In equation 6, the dislocation of density depended inversely square on the crystallite size.…”

ZnO Tetrapods: Synthesis and Applications in Solar Cells

“…As in other ZnO nanostructures' synthesis [19][20][21][22][23][24], ZnO tetrapods can be obtained via different methods [25][26][27], such as atmosphere controlled oxidation, thermal evaporation, catalytic oxidation, microwave radiation, and microemulsion. All these methods can be divided into two primary categories: the first starts from a solid phase and then proceeds through a solid-vapour transport-condensation process, while the second is a liquid reaction process.…”

Pembuatan DSSC dengan fotoanoda dari TiO2 dan β-karoten sebagai sensitizer dan Analisis kurva I-V

“…dimana α merupakan koefisien absorbsi, hυ merupakan energi foton, Eg merupakan band gap optik, dan A merupakan konstanta. Berdasarkan persamaan 1 dibuat grafik hubungan antara hυ terhadap (αhυ) 2 pada film TiO2/ITO-Glass dengan nilai band gap berhubungan dengan garis perpotongan terhadap sumbu x [17]. Band gap film TiO2/ITO-Glass didapatkan nilai sebesar 3,35 eV seperti yang ditunjukkan pada Gambar 1.…”