http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of different annealing environments on the solar cell performance of CdSe pebbles
Pawar, S.A.,Patil, D.S.,Suryawanshi, M.P.,Ghorpade, U.V.,Lokhande, A.C.,Park, J.Y.,Chalapathy, R.B.V.,Shin, J.C.,Patil, P.S.,Kim, J.H. Elsevier Science 2016 Acta materialia Vol.108 No.-
<P>Cadmium selenide pebbles have been synthesized by a simple and cost-effective chemical bath deposition method. In order to study the effect of different annealing environments, the CdSe thin films were annealed in air, nitrogen, argon and in a vacuum at 300 degrees C for 1 h. The optical, structural, compositional, and morphological properties of the films were then analyzed using UV-vis spectrophotometry, photoluminescence, X-ray diffraction, X-ray photoelectron spectroscopy, and field emission scanning electron microscopy. XRD patterns revealed the formation of amorphous CdSe thin films. Annealing entails a change in crystal structure, from amorphous to hexagonal. The chemical composition and valence states of the constituent elements were analyzed by XPS. FESEM images showed the formation of CdSe pebbles in all the samples with voids between the pebbles, but the samples annealed in a vacuum had fewer voids than did other samples. Under AM 1.5G illumination, the photoanodes had an improved power conversion efficiency of 1.44% using an aqueous polysulfide electrolyte with a short-circuit photocurrent density of 11.3 mA cm(-2) when CdSe pebbles were annealed in a vacuum. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.</P>
R. V. Rao,R. B. Pawar 한국CDE학회 2020 Journal of computational design and engineering Vol.7 No.6
In this paper, an endeavor is made to enhance the convergence speed of the recently proposed Rao algorithms. The new upgraded versions of Rao algorithms named as “quasi-oppositional-based Rao algorithms” are proposed in this paper. The quasi-oppositional-based learning is incorporated in the basic Rao algorithms to diversify the searching process of the algorithms. The performance of the proposed algorithms is tested on 51 unconstrained benchmark functions. Also, three multi-objective optimization case studies of different heat sinks such as a single-layered microchannel heat sink (SL-MCHS), a double-layered microchannel heat sink (DL-MCHS), and a plate-fin heat sink (PFHS) are attempted to investigate the effectiveness of the proposed algorithms in solving real-world complex engineering optimization problems. The results obtained using the proposed algorithms are compared with the results obtained using the well-known advanced optimization algorithms such as genetic algorithm (GA), artificial bee colony (ABC), differential evolution (DE), particle swarm optimization (PSO), teaching-learning-based algorithm (TLBO), Jaya algorithm, multi-objective genetic algorithm (MOGA), non-dominated sorting genetic algorithm (NSGA-II), real-coded GA (RCGA), direction-based GA, self-adaptive multi-population (SAMP) Rao algorithms, and basic Rao algorithms. The proposed quasi-oppositional-based Rao algorithms are found superior or competitive to the other optimization algorithms considered.
Mane, R.S.,Chang, J.,Ham, D.,Pawar, B.N.,Ganesh, T.,Cho, B.W.,Lee, J.K.,Han, S.H. Elsevier 2009 Current Applied Physics Vol.9 No.1
The present article demonstrates the use of low-cost electrochemically synthesized hydrophilic and nanocrystalline tin oxide film electrodes at room temperature in dye-sensitized solar cells and electrochemical supercapacitors. A mixed phase of tin instead of single phase composed of uniformly distributed irregular spherical grains in a nanometer regime scale was obtained. Tin oxide film electrode showed efficient photoperformance when subjected to dye-sensitized solar cells. The interfacial and specific capacitances of 118.4μF/cm<SUP>2</SUP> and 43.07F/g, respectively, in 0.1M NaOH electrolyte were confirmed from cyclic-voltammetry measurement.
Multiple band gap energy layered electrode for photoelectrochemical cells
Kale, S.S.,Mane, R.S.,Ganesh, T.,Pawar, B.N.,Han, S.H. Elsevier 2009 CURRENT APPLIED PHYSICS Vol.9 No.2
Using wet chemistry, electrode of multiple band gap energy starting from wide titanium dioxide (TiO<SUB>2</SUB>) to narrow range cadmium selenide (CdSe) is synthesized. Complete utilization of solar spectrum by initializing the film of wide band gap energy (absorbs high energy photons) permitting to narrow band gap films (absorbs low energy photons), is explored in the manuscript. X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectrophotometer techniques were used for the structural, surface morphological and optical studies. The role of every layer of descending band gap energy on the performance of photoelectrochemical cells is demonstrated. The three layered electrode exhibits a good absorbance followed by photoresponse as compared to the bilayers.
Shinde, K.P.,Pawar, R.C.,Sinha, B.B.,Kim, H.S.,Oh, S.S.,Chung, K.C. Ceramurgica ; Elsevier Science Ltd 2014 CERAMICS INTERNATIONAL Vol.40 No.10
Ni doped ZnO nanopowders have been synthesized by the co-precipitation route followed by planetary ball milling. The synthesized powder was characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HR-TEM), UV-vis spectrophotometry, fluorescence spectrophotometry and Quantum Design PPMS for structural, morphological, microstructural, optical and magnetic properties measurements. All the samples show wurtzite hexagonal crystal structure. The optical absorption spectra show a shift in the position of band edge towards lower energy. The estimated band gap is found to decrease with higher nickel doping. The room temperature PL measurements illustrate UV emission centered at 390nm (3.17eV), which is ascribed to the near-band-edge (NBE) emissions of ZnO and broad green emission around 540nm. Room temperature ferromagnetism in the Ni doped ZnO nanopowders has been confirmed by magnetic property measurements.
Study of effect of planetary ball milling on ZnO nanopowder synthesized by co-precipitation
Shinde, K.P.,Pawar, R.C.,Sinha, B.B.,Kim, H.S.,Oh, S.S.,Chung, K.C. Elsevier Sequoia 2014 Journal of Alloys and Compounds Vol.617 No.-
Nanocrystalline ZnO powders have been synthesized by co-precipitation method and investigated planetary ball milling effects on structural and optical properties. These powders were characterized using X-ray diffraction, field emission scanning electronic microscope, Infrared spectrophotometer, UV-vis spectrophotometer and Photoluminescence. It was found that prepared ZnO powders have hexagonal close packed structure which was annealed at 500<SUP>o</SUP>C for 30min. The bandgap energy of ZnO powders varied from 3.13 to 2.85eV. The room temperature PL spectra exhibits low intensity UV emission peak at 383nm and green emission band around 520nm shows shifting towards higher wavelength with decrease in intensity of peak with time of planetary ball milling. Hence, it was observed that planetary ball milling can be used to tailor the optoelectronic properties of ZnO nanostructures.