Thin film,
Solar Cell Materials,
Solar Cell,
Nanomaterials
17
Scopus Publications
Scopus Publications
Study the Effect of ZnO/Cu/ZnO Multilayer Structure by Radio Frequency Magnetron Sputtering for Flexible Display Applications Himadri Sekhar Das, , Gourisankar Roymahapatra, Prasanta Kumar Nandi, Rajesh Das, , , , and Es Energy and Environment, 2021 ZnO/Cu/ZnO multilayer structured glass and Polyethylene naphthalate (PEN) with different thicknesses of copper (Cu) layer were prepared by RF magnetron sputtering at room temperature.The electrical resistivity of the films was achieved at 8.610 - 5 •cm and 4.510 -4 •cm, the carrier concentration of 5.3210 21 cm -3 and 1.3610 21 cm -3 , low sheet resistance of 12 /cm 2 and 16 /cm 2 respectively on glass and PEN substrate respectively with the optical transmission of more than 80% for both cases at the optimum copper layer thickness.The conduction mechanism of the multilayer structure has been explained in terms of metal-to-oxide carrier injection with the variation of the thickness of the Cu layer.Different optimization procedures were used to achieve good optically transparent and electrically conductive films.The structural characterizations of multilayer films were carried out by X-ray diffraction (XRD); surface morphology and topography were performed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) respectively.The value of the sheet resistance of the structure was influenced by the deposition condition of both layers.The effect of the substrate and thickness of the Cu layer was investigated and illustrated.
Analysis of CMC of polyoxyethylene(20)sorbitan monopalmitate (Tween-40) and cetyltrimethylammoniumbromide (CTAB) in aqueous medium Journal of the Indian Chemical Society, 2018
Sol-gel synthesized aligned ZnO nanorods growth: Studies on structural and optoelectronic properties Rajesh Das, Shibabrata Basak, A. B. Maity 2011 International Conference on Nanoscience Technology and Societal Implications Nstsi11, 2011 High-density, well aligned, (001) oriented wurtzite ZnO nanostructure like flower like, rod like arrays with significantly different tip shapes were controllably fabricated by sol-gel technique in powder phase and thin film phase on transparent conducting aluminum doped zinc oxide (AZO) coated glass substrate at 1000C substrate temperature. The detail optical and structural properties ZnO nanorod coated AZO thin films have been reported. Aligned ZnO flowerlike arrays show broad blue emission peak at 440nm whereas nanorod arrays green luminescence.
Comparison of electrical, optical, and structural properties of RF-sputtered ZnO thin films deposited under different gas ambients Rajesh Das, Koel Adhikary, Swati Ray Japanese Journal of Applied Physics, 2008 Transparent conducting ZnO:Al thin films were prepared by rf-magnetron sputtering under different gas ambients at 300 °C. The electrical resistivity varied from 1.23×10-1 to 2.8×10-4 Ω cm introducing O2 and H2 gas with Ar ambient. The minimum sheet resistance of ZnO:Al film is 3.5 Ω/square. The maximum carrier concentration and Hall mobility as estimated from Hall effect measurement of the films were 2.3×1021/cm3 and 44.4 cm2 V-1 s-1 respectively. Photoluminescence (PL) spectra peaks are mainly in the blue emission region and change from 432 nm (2.87 eV) and 541.5 nm (2.29 eV) with the change of gas ambients. From the X-ray diffraction (XRD) pattern exhibiting only the <002> peak of ZnO, all films were found to be c-axis-oriented. The crystallite size varies from 150 to 288 Å for different films calculated from <002> orientation of XRD data. The characteristic features of ZnO films prepared under Ar+H2 ambient are their high carrier concentration, high strain values, high band gap and blue emission compared to the other ZnO films. The structural, electrical, optical properties and surface topography of ZnO thin films using XRD, Hall measurements, PL, UV–visible (vis)–near IR (NIR) spectroscopy and atomic force microscopy (AFM) have been investigated.
Effect of TCO coated substrate and P-layer on performance of microcrystalline silicon solar cells Proceedings of the 3rd World Conference on Photovoltaic Energy Conversion, 2003
