Layer-by-layer electrodeposition of cadmium telluride onto silicon

Electrodeposition of Semiconductors

“…Cadmium telluride has also been deposited on Si using the method of continuous cycling of the potential [61]. This work used a solution of 0.1 M CdSO 4 , 2 Â 10 À4 M TeO 2, and 0.5 M K 2 SO 4 adjusted to a pH of 1.5 AE 0.2 by the addition of H 2 SO 4 .…”

“…They point out that if the second reaction above is not fast enough the Te on the surface site can be incorporated as a Te interstitial and that for applied potentials more negative than the cadmium deposition potential (À0.4 V vs. SHE) elemental Cd is deposited. Cadmium telluride has also been deposited on Si using the method of continuous cycling of the potential [61]. This work used a solution of 0.1 M CdSO 4 , 2 Â 10 À4 M TeO 2, and 0.5 M K 2 SO 4 adjusted to a pH of 1.5 AE 0.2 by the addition of H 2 SO 4 .…”

A soft-solution electrochemical processing technique for preparing CdTe/n-Si(100) heterostructures

“…The Berlouis group [33,34] and Sugimoto and Peter [36,37] investigated CdTe electrodeposition onto silicon single crystals. Not very satisfactory results were obtained as the electrodeposited film characterization revealed that they do not form either a coherent layer or a preferential crystallographic orientation.…”

Optimization of Thickness and Number of Layers for CdTe Films Deposited by Stacked Elemental Layers Method and Annealed in Different Environments

“…CdTe has absorption coefficient > 10 4 cm -1 and optimum band gap of 1.5 eV. Furthermore, many deposition techniques have been used to prepare CdTe thin films, such as sputtering [2], electrodeposition [3], vacuum evaporation [4], electrochemical atomic layer epitaxy [5], pulsed laser deposition [6][7][8] and close-spaced sublimation [9]. Stacked elemental Layers (SEL) technique is suggested to be a commercially realizable method for manufacturing solar cells.…”