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Updated: May 13, 2026

Atom Probe Tomography Studies on the Cu(In,Ga)Se2 Grain Boundaries
Published on: April 22, 2013
Using radiative transfer equation to model absorption by thin Cu(In,Ga)Se2 solar cells with Lambertian back reflector
N Dahan1, Z Jehl, J F Guillemoles
1Laboratoire Charles Fabry, Institut d’Optique, CNRS - Universit´e Paris-Sud, Campus Polytechnique, RD128, 91127 Palaiseau Cedex, France. nir dahan@yahoo.com
Abstract:
We investigate the optical absorption in a thin Cu(In,Ga)Se(2) solar cell with a Lambertian white paint beneath a transparent back contact. Although this configuration has been proposed more than 30 years ago, it turns out that rigorous simulation of Maxwell's equations demand powerful numerical calculations. This type of approach is time consuming and does not provide a physical insight in the absorption mechanisms. Here, we use the radiative transfer equation to deal with multiple scattering of the diffuse part of the light. The collimated part is treated accounting for wave effects. Our model is in good agreement with optical measurements.
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