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2篇 您的检索式:作者名="Partha P.Pal"
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1Structural and photoluminescence studies of Eu^(3+) doped zinc oxide nanorods prepared by precipitation method显示文摘Trivalent europium doped zinc oxide (ZnO:Eu3+) nanocrystals were synthesized via room temperature chemical co-precipitation and they were systematically characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and photoluminescence (PL) spectroscopy. The as-synthesized samples were found to have hexagonal wurtzite coexisted with the intermediate Zn5(OH)8Cl2·H2O phase, while the single hexagonal phase was facilitated due to the calcinations. The as obtained samples were broadly composed of nanoflakes while the highly crystalline nanorods were formed due to low temperature annealing of the as-synthesized samples. The crystallite size of the nanoflakes and nanorods (40-90 nm) were extracted from the XRD pattern which was found to be consistent with scanning electron microscopy (SEM) measurements. The photolumi-nescence (PL) spectra of nanophosphors showed bright red and orange emissions at 618 and 594 nm respectively with efficient broad blue green emission spectrum due to ZnO lattice. Further, a good energy transfer process from ZnO host to Eu3+ was observed in PL emission and excitation spectra of Eu3+ doped ZnO ions. In all, the present nanophosphors were found to have great potentiality for bio-applications.Partha P.Pal J.Manam 2013Journal of Rare Earths2013,31,1:8
2ZnO_(1-x)Te_x and ZnO_(1-x)S_x semiconductor alloys as competent materials for opto-electronic and solar cell applications:a comparative analysis显示文摘ZnO_(1-x)Te_x ternary alloys have great potential to work as a photovoltaic(PV) absorber in solar cells.ZnO_(1-x)S_x is also a ZnO based alloy that have uses in solar cells.In this paper we report the comparative study of various parameters of ZnO_(1-x)Te_x and ZnO_(1-x)S_x for selecting it to be a competent material for solar cell applications.The parameters are mainly being calculated using the well-known VCA(virtual crystal approximation) and VBAC(Valence Band Anti-Crossing) model.It was certainly being analysed that the incorporation of Te atoms produces a high band gap lower than S atoms in the host ZnO material.The spin-orbit splitting energy value of ZnO_(1-x)Te_x was found to be higher than that of ZnO_(1-x)S_x.Beside this,the strain effects are also higher in ZnO_(1-x)Te_x than ZnO_(1-x)S_x.The remarkable notifying result which the paper is reporting is that at a higher percentage of Te atoms in ZnO_(1-x)Te_x,the spin-orbit splitting energy value rises above the band gap value,which signifies a very less internal carrier recombination that decreases the leakage current and increases the efficiency of the solar cell.Moreover,it also covers a wide wavelength range compared to ZnO_(1-x)S_x.Utsa Das Partha P.Pal 2017Journal of Semiconductors2017,38,8:0
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