4.6 Article

Evolutionary optimization of the short-circuit current enhancement in organic solar cells by nanostructured electrodes

Journal

JOURNAL OF APPLIED PHYSICS
Volume 132, Issue 15, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0097964

Keywords

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Funding

  1. Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
  2. China Scholarship Council
  3. [680-47-628]

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In this study, we used a particle swarm optimization algorithm and finite-difference time-domain simulations to design metallic nanoparticle and nanohole array electrodes to enhance the short-circuit current of organic solar cells.
Using a particle swarm optimization algorithm (a population-based stochastic optimization technique) combined with 3D finite-difference time-domain simulations, we inverse design periodic arrays of metallic nanoparticles on indium-tin-oxide electrodes and nanoholes in metallic thin films working as electrodes in P3HT (Poly(3-hexylthiophene-2,5-diyl)):PCBM ([6,6]-Phenyl C61 butyric acid methyl ester) organic solar cells to achieve the maximum short-circuit currents ( J(sc)). Nanohole-array electrodes have large optical losses, leading to a net reduction of J(sc) compared to a reference solar cell. On the other hand, nanoparticle arrays can lead to a significant enhancement of J(sc) of up to 20%. Detailed simulations show that this enhancement is caused by the grating coupling of the incident light to surface plasmon polaritons at the interface of the metal electrode and the hole transport layer, leading to the enhancement of the electromagnetic field in the organic blend.

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