Karim M. Gad

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We demonstrate a low surface recombination velocity of 14 cm/s with only 1.5 nm thin titanium dioxide (TiO<sub>2</sub>) layers on undiffused 10 &#x03A9;cm p-type crystalline silicon. The TiO<sub>2</sub> nanolayers were deposited by thermal atomic layer deposition at 150 &#x00B0;C and 200 &#x00B0;C substrate temperatures using tetrakis-dimethyl-amido(More)
The use of Visible Light Communication (VLC) in wake-up communication systems is a potential energy-efficient and low-cost solution for wireless communication of consumer electronics. In this paper, we go one step further and propose the use of visible light both for wake-up communication and energy harvesting purposes, with the final objective of an(More)
We analyze the chemical passivation quality of silicon oxide-nanolayers on crystalline silicon wafers prepared by different oxidation methods with surface photo voltage and quasi-steady-state photo conductance measurements. It is shown that for wet chemical oxidation and plasma oxidation, adequate passivation of the interface defects is achieved by(More)
We present a solar cell based on a titanium dioxide / p-type silicon charge carrier separating heterojunction with an efficiency of 10.1%, on a cell area of 0.9 cm<sup>2</sup>. The solar cells were fabricated using industrial feasible processes like laser fired contacts on the rear and silicon nitride antireflection coating on the front side. The ultra-thin(More)
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