Mathematical Models for Nano Science - Politecnico di Milano
Mathematical Models for Nano Science - Politecnico di Milano
Mathematical Models for Nano Science - Politecnico di Milano
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Bulk Heterojunction solar cells<br />
light<br />
current<br />
at contacts<br />
absorbption<br />
ra<strong>di</strong>ative<br />
recombination<br />
drift / <strong>di</strong>ffusion<br />
bulk<br />
excitons<br />
<strong>di</strong>ffusion<br />
bulk<br />
free carriers<br />
interface<br />
excitons<br />
partial<br />
<strong>di</strong>ssociation<br />
geminate<br />
recombination pairs<br />
drift / <strong>di</strong>ffusion<br />
recombination<br />
interface<br />
free carriers<br />
recombination to<br />
triplet excitons<br />
<strong>di</strong>ssociation<br />
L<br />
Γ N<br />
Γ C<br />
hν<br />
Ω<br />
Γ A<br />
Γ N<br />
Assumptions<br />
• Homogeneity. Blend as a single material<br />
with averaged properties<br />
• Imme<strong>di</strong>ate transition exciton → charge<br />
transfer state<br />
• Einstein relation<br />
Unknowns: X , n, p and ϕ
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