Effect of Low Concentration Sn Doping on Optical Properties of CdS Films Grown by CBD Technique

Abstract

Thin and transparent films of doped cadmium sulfide (CdS) were obtained on commercial glass substrates by Chemical Bath Deposition (CBD) technique. The films were doped with low concentration of Sn, and annealed in air at 300 °C for 45 min. The morphological characterization of the films with different amounts of dopant was made using SEM and EDAX analysis. Optical properties of the films were evaluated by measuring transmittance using the UV-vis spectrophotometer. A comparison of the results revealed that lower concentration of Sn doping improves transmittance of CdS films and makes them suitable for application as window layer of CdTe/CIGS solar cells.

Dilute tin-doped CdS nanowires for low-loss optical waveguiding

“…1h) show that Sample d (pure CdS nanowires) only has a narrow bandedge emission band at 520 nm, while Samples e-g (with increasing doping) have additional broad strong emission bands spanning from $540 to $720 nm, which originate from the different dopant-induced intrinsic or extrinsic defects. 13,15,[20][21][22] The relative intensity of trap-state emission to bandedge emission increases signicantly from Sample d to g, which well explains the changed color in the real-color PL photographs (Fig. 1d-g).…”

“…The existence of these SnS 2 -related vibration modes gives direct evidence that tin has been successfully incorporated into the CdS wires. According to the literature, 20,21 Sn ions of slightly bigger radius were found to substitute the Cd ions in the lattice without changing the crystal structure of CdS, but introducing defect states. It is this dilute doping concentration that allows for the co-existence of high crystalline quality and considerable trap-state emission in these nanowires, 13 which is entirely different from those heavily doped semiconductor nanostructures that usually suffer from high structural disorders and rough surfaces.…”

Terbium doped SnO2 nanoparticles as white emitters and SnO2:5Tb/Fe3O4 magnetic luminescent nanohybrids for hyperthermia application and biocompatibility with HeLa cancer cells

“…30,31 The EDAX investigations reveal that prepared nanoparticles are composed of Tb, Sn, and O. † The peaks for Tb are observed at about 1.5, 6.3 and 7.1 keV.…”

Realizing near stoichiometric and highly transparent CdS:Mo thin films by a low‐cost improved SILAR technique

“…To make them suitable for photovoltaic applications, the efficiency of CdS semiconductor films is improved by changing its optical and/or electrical properties by doping with elements like indium , tin , and silver . As good optical transmittance is one of the prerequisites for window layers in thin film solar cells, there is a need for a viable technique for depositing highly transparent CdS thin films . In this paper, we present a report on the fabrication of highly transparent Mo doped CdS films using an improved successive ionic layer adsorption and reaction (ISILAR) technique .…”