Influence of film thickness and In-doping on physical properties of CdS thin films

Butt, Sajid Ullah; Shah, Nazar Abbas; Nazir, Adnan; Ali, Zulfiqar; Maqsood, Asghri

doi:10.1016/j.jallcom.2013.10.221

Cited by 63 publications

(22 citation statements)

References 18 publications

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“…It is found that with increasing thickness, the value of resistivity decreases. The resistivity is related to grain size or dislocation density which corresponds to presence of more defects in the sample [21,22]. A sample having low grain size or having high value of dislocation density shows high value of resistivity.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Silver Doping Effects on ZnTe Thin Films by Thermal Evaporation Technique

Shah¹,

Syed²,

Murrawat³

2017

J Material Sci Eng

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Zinc telluride (ZnTe) thin films were fabricated by thermal evaporation method on corning glass substrates. ZnTe thin films were doped with silver (Ag) by dipping in low concentrated solution (0.2 g/200 ml) of AgNO 3 × H 2 O at room temperature. X-ray diffraction technique was used to investigate the structural behavior of ZnTe samples. Optical investigations were done by using spectrophotometer. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) were used to analyze the surface and composition of the thin film samples respectively. Electrical investigations were done by using Van Der Pauw and Hall measurement system. It was found that prepared samples showed polycrystalline structure with <111> as preferred orientation. Optical study showed that with increasing thickness, grain size increased but optical transmission and energy band gap were decreased. It was observed that value of resistivity of these samples decreased with increasing thickness and Ag composition. The results were compared before and after Ag doping in ZnTe thin films samples for the solar cell applications.

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Section: Electrical Propertiesmentioning

confidence: 99%

Silver Doping Effects on ZnTe Thin Films by Thermal Evaporation Technique

Shah¹,

Syed²,

Murrawat³

2017

J Material Sci Eng

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“…The copper indium gallium diselenide/sulphide (CIGS), CdTe, and CuInSe 2 / sulphide can form the heterojunction photovoltaic cell with cadmium sulphide [7] . Doping impurity elements like indium, aluminum, gallium, and boron can promote the optical and electronic characteristics of CdS [8][9][10][11] . Also, CdSe doped with different elements for obtaining p-type CdSe or high n-type CdSe carrier concentrations such as CdSe:Sb [12] , CdSe doping with Er 3+ [13] , CdSe doping with indium [14] and Ni doping [15] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

Assim

2021

Egyptian Journal of Solids

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The nanocrystalline Al-doped CdS semiconductors were produced accurately by the sol-gel calcination process. The aluminum was added with different percent's (0, 1, 5, 10, 15, and 20 wt%) to the synthesized CdS. Both FT-Raman analysis and UV-VIS-NIR absorption measurements were utilized to characterize the studied semiconductors' structural and optical characteristics. The detected X-ray diffraction (XRD) patterns of the prepared CdS present a polycrystalline structure, and Al-doping does not significantly impact this range. Optical bandgaps were determined for undoped and Al-doped CdS, showing a significant change with the percentage of Al-dopants. With increasing Al-doping up to (20 percent), the optical bandgap for CdS (2.38 eV) grows to reach (2.47 eV) and the allowed transitions were found to be direct for the investigated samples. The blue shift may be the reason for the optical bandgap variations. Scanning Electron Microscope (SEM) micrographs were performed to establish the Al-doped CdS nanostructure to identify the morphological characteristics.

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“…CdS is an n-type potential window layer material in CdTe 7 based solar cells, with energy band gap of 2.42 eV 10 . Many techniques have been used to synthesize CdS thin films including chemical vapour deposition (CVD) 11 and physical vapour deposition (PVD), chemical bath deposition (CBD) 12 , thermal evaporation 13 , pulsed laser 14 and close spaced sublimation (CSS) techniques 15 . Encouraging results have been attained by using CSS technique for the second generation based solar cells 16 .…”

Section: Introductionmentioning

confidence: 99%

Optical and electrical studies of CdS thin films with thickness variation

Mahmood

Ali

Zahid³

et al. 2018

Optik

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Cadmium sulphide (CdS) is the n-type, wide band gap II-VI semiconducting material by offering applications in photovoltaics. Among the range of applications offered by CdS thin films, it has found application as a window layer in second generation solar cells by creating photon traps, thereby quantum efficiency. Closed space sublimation (CSS) offers a trivial yet effective approach for the synthesis of thin films for solar cell applications at moderate temperatures. CdS thin films of controlled thicknesses were synthesized by CSS technique by varying exposure time. X-rays diffraction data of these thin films revealed polycrystalline nature with a preferred orientation along (002) direction. The scanning electron microscopy (SEM) based morphological studies showed grain size variation with an increase in thickness of deposited thin films in the range of 300-500 nm. The electrical studies revealed high resistivity of the order of 10 6 Ω-cm. Spectrophotometric studies performed for CdS thin films concluded with the calculation of the optical parameters such as refractive index, absorption coefficient employing the Swanepoel model, and energy band gap of ~2.42 eV using the Tauc relation in addition to thin film thickness confirmation. The variations in thickness affect the structure, surface, optical 1 , electrical properties.

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Influence of film thickness and In-doping on physical properties of CdS thin films

Cited by 63 publications

References 18 publications

Silver Doping Effects on ZnTe Thin Films by Thermal Evaporation Technique

Silver Doping Effects on ZnTe Thin Films by Thermal Evaporation Technique

Synthesis, structure, and optical properties of nanopowders CdS: xAl (x=0, 1, 5, 10, 15 and 20%) via the sol–gel technique

Optical and electrical studies of CdS thin films with thickness variation

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