Utilizing Wide Band Gap, High Dielectric Constant Nanoparticles as Additives in Organic Solar Cells
| Autor: | Sumit Chaudhary, Michael R. Kessler, Mitch Rock, Pengfei Du, Ryan S. Gebhardt, Rana Biswas, Akshit Peer, Baskar Ganapathysubramanian |
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| Rok vydání: | 2015 |
| Předmět: |
Photocurrent
Materials science Fullerene Organic solar cell business.industry Wide-bandgap semiconductor Physics::Optics Nanoparticle Light scattering Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science chemistry.chemical_compound General Energy chemistry Chemical engineering Polythiophene Optoelectronics Physical and Theoretical Chemistry business High-κ dielectric |
| Zdroj: | The Journal of Physical Chemistry C. 119:23883-23889 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | We experimentally and theoretically investigate the effects of utilizing BaTiO3 nanoparticles as additives in polythiophene/fullerene solar cells. BaTiO3 nanoparticles were chosen because of their multifaceted potential for increasing exciton dissociation (due to their high dielectric constant) and light scattering. To achieve stable suspensions for device fabrication, the nanoparticles were functionalized with organic ligands. Solar cells fabricated in air showed ∼40% enhancement in the photocurrent primarily due to string-like aggregates of functionalized BaTiO3 particles that increase light absorption without hindering charge collection. Solar cells fabricated in an inert atmosphere yielded overall more efficient devices, but the string-like aggregates were absent and enhancement in photocurrent was up to ∼6%. Simulations with the excitonic drift-diffusion model demonstrate that a bare nanoparticle significantly increases exciton dissociation, whereas the functional group negates this effect. Simulatio... |
| Databáze: | OpenAIRE |
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