Effect of Film Thickness on Optical Properties of Tin Selenide Thin Films Prepared by Thermal Evaporation for Photovoltaic Applications

Kumar, Nikhil; Parihar, Usha; Kumar, Rahul; Patel, K. J.; Panchal, C. J.; Padha, Naresh

doi:10.5923/j.materials.20120201.08

Cited by 67 publications

(31 citation statements)

References 18 publications

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“…The decrease in resistance is attributed to increased drift mobility and concentration of charge carriers at elevated temperatures [15]. At room temperature minimum ln of resistivity found was 9.60 X m of sample B3, and at 600°C temperature minimum ln of resistivity found was 1.25 X m of sample B2 which was also in good agreement with already reported results [13,[18][19][20] and continuation of our author's previous work [21]. Enhanced electrical conductivity of bismuth cobaltite can be the result of improved grain alignment due to Nd doping [22], The activation energy was also calculated from Arrhenius relation as given in Eq.…”

Section: Electrical Analysissupporting

confidence: 91%

Facile synthesis and conduction mechanism in RE-substituted oxide systems for enhanced thermoelectric performance

Ahmed

Munir

Khan

et al. 2015

J Mater Sci: Mater Electron

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Bismuth based oxide nanomaterials with doping of rare earth element Nd were synthesized by simplified sol-gel method. Elemental composition was Bi 2 Ca 2-X R X CoO 6 where R is for rare earth neodymium (Nd). Structural characterizations have shown monoclinic crystal structure with C2/c space group. Differential scanning calorimetery and thermogravimetric analysis were done for thermal behavior of nanomaterials. Thermal stability of samples were enhanced after doping of rare earth element. Electrical resistivity measurements were carried out as a function of temperature, which showed decrease in resistivity with increase in temperature. Thermal transport properties like thermal conductivity, thermal diffusivity and volumetric heat capacity were measured. Thermal conductivity measurements have shown lower values after doping. Variation in thermal transport properties with temperature are also discussed. These results suggest that Nd is the effective element for improving thermoelectric properties of bismuth based cobalt oxides.

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Section: Electrical Analysissupporting

confidence: 91%

Facile synthesis and conduction mechanism in RE-substituted oxide systems for enhanced thermoelectric performance

Ahmed

Munir

Khan

et al. 2015

J Mater Sci: Mater Electron

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“…Figure 8a shows that, the values of transmission were increased with decreasing the particle size from 10.6 to 5.6 nm as seen at the higher wavelength region. The higher transmission values is due to the presence of less adsorbed states and the surface smoothing in the thinner film as reported by Kumar et al [26]. In addition, Fig.…”

Section: Resultsmentioning

confidence: 54%

Air-stable Cd0.23Zn0.77Te nanostructure thin films

Zawawi

Mahdy

2014

J Mater Sci: Mater Electron

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Air-stable CdZnTe nanostructure thin films were synthesized by inert gas condensation technique under constant preparation conditions of Argon gas flow, deposition rate and substrate temperature 300 K. The CdZnTe nanostructure thin films were deposited on freshly cleaned glass substrates. The film thickness has been raised from 20 to 70 nm. The films exhibited nanocrystalline single phase cubic structure as indicated by grazing incident in-plane X-ray diffraction patterns and ensured by HRTEM diffraction patterns. The average particle size of examined films was increased from 5.6 to 10.6 nm by raising thin film thickness as determined from HRTEM images. The average particle size of examined film was measured by HRTEM after 230 day aging and shows a relative stability in the particle size. The optical transmission, reflection and absorption spectra were influenced by the increasing of the particle size P s . The optical band gap E g decreased from 3.24 to 3.05 eV as average particle size enlarged from 5.6 to 10.6 nm. Higher values of absorption coefficient spectra and refractive indices have been observed for films of higher particle size. Relative stability of optical properties has been detected for aged film. The d.c. electrical conductivity behavior at different temperatures was tuned by changing the particle size of examined nanocrystalline films. The activation energy values are in the range 0.67-0.77 eV regardless the change in particle size.

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“…In addition, there are various factors that may influence the transmittance or absorption of the films, which could affect the band gap of the WO 3 films [30]. Generally, thicker films absorb more light, causing the band gap to decrease [31]. Thus, improved light absorption would help generate a larger number of charge carriers, which would increase the photocurrent.…”

Section: Crystalline Optical and Morphological Propertiesmentioning

confidence: 97%

Electrostatic spray deposition of transparent tungsten oxide thin-film photoanodes for solar water splitting

et al. 2016

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Effect of Film Thickness on Optical Properties of Tin Selenide Thin Films Prepared by Thermal Evaporation for Photovoltaic Applications

Cited by 67 publications

References 18 publications

Facile synthesis and conduction mechanism in RE-substituted oxide systems for enhanced thermoelectric performance

Facile synthesis and conduction mechanism in RE-substituted oxide systems for enhanced thermoelectric performance

Air-stable Cd0.23Zn0.77Te nanostructure thin films

Electrostatic spray deposition of transparent tungsten oxide thin-film photoanodes for solar water splitting

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