Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-06-09
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Preprint for submission to the 17th EUPVSC, Munich, Germany, 2001, 4 pages pp. 41-44
Scientific paper
The spectral response of quantum well solar cells (QWSCs) is well understood. We describe work on QWSC dark current theory which combined with SR theory yields a system efficiency. A methodology published for single quantum well (SQW) systems is extended to MQW systems in the Al(x) Ga(1-x) As and InGa(0.53x) As(x) P systems. The materials considered are dominated by Shockley-Read-Hall (SRH) recombination. The SRH formalism expresses the dark current in terms of carrier recombination through mid-gap traps. The SRH recombination rate depends on the electron and hole densities of states (DOS) in the barriers and wells, which are well known, and of carrier non-radiative lifetimes. These material quality dependent lifetimes are extracted from analysis of suitable bulk control samples. Consistency over a range of AlGaAs controls and QWSCs is examined, and the model is applied to QWSCs in InGaAsP on InP substrates. We find that the dark currents of MQW systems require a reduction of the quasi Fermi level separation between carrier populations in the wells relative to barrier material, in line with previous studies. Consequences for QWSCs are considered suggesting a high efficiency potential.
Ballard Ian
Barnham Keith W. J.
Button Chris
Connolly James P.
Foxon Tom
No associations
LandOfFree
Modelling Multi Quantum Well Solar Cell Efficiency does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modelling Multi Quantum Well Solar Cell Efficiency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling Multi Quantum Well Solar Cell Efficiency will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-40207