Invertis Journals of Renewable Energy

U. P. Khairnar ¹, S. V. Borse ¹, H. B. Patil ²

Affiliations
1 Department of Physics, S.S.V.P.S, ACS, College, Shindkheda-425406, (M.S.), IN
2 Department of Physics, R.C. Patel ACS, College, Shirpur-425405 (M.S.), IN

Abstract

Zn_xCd_(1-x)Te thin films of variable composition have been investigated. Structural and optical properties of Zn_xCd_(1-x)Te solid solution with x = 0.1, 0.2, 0.3, 0.4, and 0.5 were synthesized, from the resulting ZnTe and CdTe composition used in preparation of thin films. Structural investigation indicates they have polycrystalline structure. Composition was confirmed from EDAX while SEM picture shows homogeneity in films. Plots of (αhν)² versus (hν) yield straight line indicating direct transition. It is also found with increase Zn content the band gap of the films increases.

Keywords

Thermal Evaporation, EDAX, XRD, Optical Band Gap.

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H. B. Patil ¹, S. V. Borse ², R. R. Ahire ³

Affiliations
1 Department of Physics, R.C.Patel ASC College, Shirpur-425405 (M.S.), IN
2 Department of Physics, S. S. V. P. S. College, Shindkheda (M.S.), IN
3 Department of Physics, S.G.Patil ACS College, Sakri, IN

Abstract

We report the structural and Optical properties of crystalline Cadmium Chromium sulfide (x= 0.6) thin films was deposited on glass substrate using the chemical bath deposition method. The prepared thin films were characterized by X-ray diffraction analysis; scanning electron microscopy. From UV spectroscopy, the value of fundamental absorption edge from the intercept lies between 1.5528 - 3.7083 eV and the corresponding α values were 6.869 × 10⁵ to 1o.4129 × 10⁵ cm^-1. The direct optical energy band gap of this sample was 2.2735 eV lying in the range of semi-conducting materials, suitable for solar cell applications.

Keywords

CBD, XRD, SEM, Absorption Coefficient, Direct Optical Band Gap.

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H. B. Patil ¹

Affiliations
1 Department of Physics, R.C. Patel Arts, Commerce and Science College, Shirpur-425405, IN

Abstract

We report the synthesis and Optical properties of crystalline Copper sulfide and Lead sulfide thin films deposited on glass substrate using the chemical bath deposition method [CBD] at room temperature for 22 hours 23 minutes and 72 hours respectively. Copper sulfide was synthesized using copper sulphate and thiourea, while Lead nitrate and thiourea were used for the synthesis of lead sulfide thin films. Optical properties of the thin films were studied by spectrophotometer in the wavelength range of 200 nm - 800 nm. Band gap [Eg], absorbance [A] and absorption coefficients [α] were examined as a function of wavelength and photon energy. Further analysis revealed that Cu2S and PbS thin films had a band gap of 2.324 eV and 2.586 eV respectively, suitable for solar cell applications.

Keywords

Cu₂S and PbS Thin Film, Semiconductors, Chemical Bath, Optical Properties, Solar Cell Application.

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H. B. Patil ¹

Affiliations
1 Department of Physics, R.C. Patel College Arts, Commerce and Science, Shirpur, IN

Abstract

The present work investigated the biosynthesis of silver nanoparticles using Aspergillus flavus. The fungus, Aspergillus flavus when challenged with silver nitrate solution accumulated silver nanoparticles in 96 hr. The biosynthesized silver nanoparticles were confirmed by visual observation and UV-Vis spectroscopy. An absorption peak at 420 nm in UV-visible spectrum corresponds to the Surface Plasmon Resonance (SPR) of silver nanoparticles. The silver nanoparticles were found to be spherical and rod in shape. The X-ray diffractograms and SEM analysis indicate that the silver particles are crystalline in nature. From SEM images grain size of silver nanoparticles is ranging from 30 nm to 48.2 nm.

Keywords

Aspergillus Flavus, Biosynthesis, Silver Nanoparticles, XRD, SEM.

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Pankaj R. Mali ¹, H. B. Patil ¹

Affiliations
1 Department of Biotechnology, R.C. Patel College of Arts, Commerce and Science, Shirpur, IN

Abstract

Algae are very simple in operation and easy in adaptability by Indian farmers. The technology has got potential to provide an additional income from the scale of algal bio-fertilizer. The study carried out in the village of Nashik tehisil of Nashik District of Maharashtra state western part of western part of Nashik. The climatic and socioeconomic condition of the study area small and marginal landholders and most of the farmers are tribal peoples. For these study forty farmers from five villages i.e. eight from each village were selected. Primary data of rice cultivation were collected by discussion, interview about their cultural practices and yield. In each village ten farmers were grouped into four classes. The effective of various combinations of communication modes it was concluded that combination of all four modes or three modes had showed significant impact of BGA technology. The response of post questionnaire on poster show, field demonstration, mass culture and printed matter was found significant and it was concluded that all modes were effective of message communication.

Keywords

Blue Green Algae, Bio-Fertilizer, Paddy Growing.

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Pankaj R. Mali ¹, H. B. Patil ¹

Affiliations
1 Department of Biotechnology, R.C.Patel College of Arts, Commerce and Science, Shirpur, IN

Abstract

Plant diseases have been concerned with mankind since agriculture began and played a crucial role in the destruction of natural resources and contributing 13 to 20 per cent losses in crop production worldwide (Anonymous., 1993). In particular, soil-borne pathogens cause important losses, fungi being the most aggressive. The distribution of several phytopathogenic fungi, such as Pythium, Phytophthora, Botrytis, Rhizoctonia and Fusarium have widely spreaded during the last few years due to change the introduced in farming with detrimental effects on crops of economic importance. In addition, not only growing crops but also stored fruits prey to fungalinfection (Chet et al., 1997). Moreover, an integrated approach promotes a degree of disease suppression similar to that achieved with full fungicidal treatment. For about 70 years, Trichoderma spp. have been known to attack other fungi, to produce antibiotics that affect other microbes and to act as biocontrol microbes (Weindling, 1934). Antagonists of phytopathogenic fungi have been used to control plant diseases and 90 per cent of such applications have been carried out with different strains of Trichoderma (Monte, 2001). The success of Trichoderma as biocontrol agents (BCAs) is due to their high reproductive capacity, ability to survive under very unfavorable conditions, efficiency in the utilization of nutrients, capacity to modify the rhizosphere, strong aggressiveness against phytopathogenic fungi and efficiency in promoting plant growth and defense mechanisms. These properties have made Trichoderma a ubiquitous genus present in any habitat and at high population density (Misra and Prasad, 2003).

Keywords

Trichoderma, Biocontrol, Antifungal.

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J. P. Mahashabde ¹, H. B. Patil ¹

Affiliations
1 R.C.Patel Arts, Commerce and Science College, Shirpur, IN

Abstract

Thin films of ternary Pb_xMn_1-xS (x=0.1) have been deposited on glass substrate by the simple and economical chemical bath deposition method. The structural investigations performed by X-ray diffraction technique showed that the films have a polycrystalline nature. From UV spectroscopy, the value of fundamental absorption edge from the intercept lies between 1.5528-3.4508 eV and the corresponding absorption coefficient values were 6.791×10⁵ to 10.00195×10⁵ cm^–1. The direct optical energy band gap of this sample was 2.1177 eV lying in the range of semi-conducting materials. The thin films were uniform and adherent to substrate.

Keywords

Pb_xMn_1–xS, Thin Films, Chemical Bath Deposition, Thin Film, Structural, Optical Properties.

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