In-situ CdS/CdTe heterojuntions deposited by pulsed laser deposition

Abstract

In this paper pulsed laser deposition (PLD) methods are used to study p-n CdTe/CdS heterojunctions fabricated in-situ. In-situ film deposition allows higher quality p-n interfaces by minimizing spurious contamination from the atmosphere. Morphologic and structural analyses were carried for CdTe films deposited on various substrates and different deposition conditions. The electrical characteristics and performance of the resulting p-n heterojunctions were studied as function of substrate and post-deposition anneal temperature. In-situ growth results on diodes with a rectification factor of ~ 10 5 , an ideality factor < 2, and a reverse saturation current ~10-8 A. The carrier concentration in the CdTe film was in the range of ~10 15 cm-3 , as measured by C-V methods. The possible impact of sulfur diffusion from the CdS into the CdTe film is also investigated using High Resolution Rutherford Back-Scattering.

Tuning the morphology of manganese oxide nanostructures for obtaining both high gravimetric and volumetric capacitance

“…By using PLD, it is practically simple to change the pressure in the PLD chamber and consequently, to tune the density of the prepared nanostructures in a straightforward way. [49][50][51][52] The oxidation state of the transition metal oxides prepared by this method is expected to be similar, and thus one can focus on the pure morphology effect on the supercapacitive properties.…”

Ga doping of nanocrystalline CdS thin films by electrodeposition method for solar cell application: the influence of dopant precursor concentration

“…A range of techniques have also been used to produce CdS both in bulk and thin film forms. These methods include close space sublimation [8], thermal evaporation [9], sputtering [10], spray pyrolysis [11], metal organic chemical vapour deposition [12], pulsed laser deposition [13], molecular beam epitaxy [14], sol-gel [15], chemical bath deposition (CBD) [16] and electrodeposition [17]. With the opening up of renewable energy as a new field of technology in recent times, there has been a renewed interest in the research on CdS with respect to its application in solar cells.…”