Searched for: subject%3A%22a%255C-Ge%255C%253AH%22
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de Vrijer, T. (author), Roodenburg, Koos (author), Saitta, F.S. (author), Blackstone, Thijs (author), Limodio, G. (author), Smets, A.H.M. (author)
An alloy based on the group IV elements germanium and tin has the potential of yielding an earth-abundant low bandgap energy semiconductor material with applications in the fields of micro-electronics, optics, photonics and photovoltaics. In this work, the first steps towards the plasma enhanced chemical vapour deposition (PECVD) processing of a...
journal article 2022
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de Vrijer, T. (author), Bouazzata, Bilal (author), Ravichandran, Ashwath (author), van Dingen, Julian E.C. (author), Roelandschap, Paul J. (author), Roodenburg, Koos (author), Roerink, Steven J. (author), Saitta, F.S. (author), Blackstone, Thijs (author), Smets, A.H.M. (author)
In this paper the opto-electrical nature of hydrogenated group IV alloys with optical bandgap energies ranging from 1.0 eV up to 2.3 eV are studied. The fundamental physical principles that determine the relation between the bandgap and the structural characteristics such as material density, elemental composition, void fraction and...
journal article 2022
document
Roodenburg, Koos (author)
The development in solar cells began with wafer based cells, also called the first generation photovoltaic technology. Most of these wafer based cells were made of crystalline silicon. As a crystalline silicon cell must be relatively thick to absorb most of the incoming energy, the second generation (thin film solar cells) was introduced. In the...
master thesis 2021
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van Dingen, Julian (author)
For the far majority of current photovoltaic devices, photons with an energy below 1.1eV are not utilized. Adding a Plasma Enhanced Chemical Vapor Deposition (PECVD) processed germanium bottom cell to a multi-junction device has the potential to provide a low-cost boost in conversion efficiency by utilizing a part of this spectral range below 1...
master thesis 2021
document
de Vrijer, T. (author), Ravichandran, Ashwath (author), Bouazzata, Bilal (author), Smets, A.H.M. (author)
Low-cost multijunction photovoltaic devices are the next step in the solar energy revolution. Adding a bottom junction with a low bandgap energy material through plasma enhanced chemical vapor deposition (PECVD) processing could potentially provide a low-cost boost in conversion efficiency. A logical candidate for this low bandgap material is...
journal article 2021
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Bouazzata, B. (author)
The maximal conversion efficiency on a single pn-junction solar cell is calculated to be 33.7% at a band gap energy of 1.34 eV. The main reasons for this maximum are the non-absorption of low energy photons and the thermalization of high energy photons. To counter this, multijunction devices can be constructed to make optimal use of the spectral...
master thesis 2020
document
Ravichandran, Ashwath (author)
Single junction solar cells have a theoretical efficiency limit of 33.1% due to spectral mismatch. To overcome this, multi-junction devices are generally fabricated with two or more junctions, so as to achieve better energy conversion efficiency by optimum spectral utilization. The c-Si bottom cell of a thin-film Si triple-/quadruple-junction...
master thesis 2020
Searched for: subject%3A%22a%255C-Ge%255C%253AH%22
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