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4. Conclusion
Provided that major national research programs maintain the necessary long-term commitment, we can foresee five good reasons why thin-film technologies will be preferred for mass production:
materials with a direct band gap (chalcogenides, amorphous silicon) absorb ten times more visible light than crystalline silicon;
for better spectral conversion, it's easier to stack two or three different materials in a thin-film photovoltaic cell, with the front diode converting the blue part of the spectrum delivering the highest voltage ( V oc " 1,00 V for E g " 1.70 eV) and the rear diode converting the red part with a lower voltage ( V oc " 0.60 V for E g...
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CdTe
A number of process-related issues remain to be resolved.
CdTe doping is still not well controlled. Empirically, we've found that treatment with CdCl 2 (a compound well known for helping the recrystallization of CdS layers) is beneficial. All at once, it activates the junction, passive grains,...
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- - http://www.sudoc.abes.fr
- POISSANT (Y.) - Étude et optimisation de cellules solaires photovoltaïques en couches minces de silicium polymorphe - . Thèse de doctorat : Physique. Sciences des matériaux. Rhéologie,...
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