Computational modelling of the reflectivity of AlGaAs/GaAs and SiGe/Si quantum well solar cells

Abstract

In this paper the modelling of the reflectivity of two quantum well solar cells (QWSC) are theoretically developed and computationally analysed. The new reflectivity model is based on the Modified Single Effective Oscillator model combined with Fresnel's equation. The model takes into consideration the effects of the design parameters including concentration levels, structural properties of the device (well length, etc.), operating temperature and electric field effects. The results generated are for a bare AlGaAs/GaAs cell and the same cell with a ZnS antireflection coating (ARC). Further investigations include a bare SiGe/Si cell and the same cell with a Ta 2 O 5 ARC. The results generated are accurate and match with experimental data for similar cells. The analysis is performed for AM 1.5 spectrum. The model is intended to be an aid to QWSC designers. r

A new approach to determine radiative recombination lifetime in quantum well solar cells

“…In our approach the absorption coe cient and the transitional matrix are determined using the approach documented in Ref. [16]. However, in our case the introduction of the probability function has changed the proportionality relationship.…”

Evaluation of plasma-sprayed alumina as thermal control coatings for micro-satellites

“…Silicon solar cells usually operate over a wide range. However, the efficiency of the solar cells decreases with an increase in temperature [71,79,98,99,130]. But the decrease is relatively small.…”