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| Authors |
Tmwj Bandara Christopher Knee Maurizio Furlani Ingvar Albinsson B. E. Mellander |
|---|---|
| Published in | Journal of Materials Science-Materials in Electronics |
| Volume | 30 |
| Issue | 2 |
| Pages | 1654-1662 |
| ISSN | 0957-4522 |
| Publication year | 2019 |
| Published at |
Department of Chemistry and Molecular Biology Department of Physics (GU) |
| Pages | 1654-1662 |
| Language | en |
| Links |
dx.doi.org/10.1007/s10854-018-0436-... |
| Keywords | sensitized solar-cells, low-cost, performance, deposition, nanoparticles, electrolyte, emergence, oxide, WJ (reprint author), Univ Peradeniya, Dept Phys, Peradeniya, Sri Lanka., Bandara, TMWJ (reprint, Engineering, Materials Science, Physics, egan b, 1991, nature, v353, p737 |
| Subject categories | Physical Sciences |
Photovoltaic cells using polycrystalline La substituted bismuth iron oxide, Bi1-xLaxFeO3, (0.1x0.4), films as the light harvesting component were investigated in this work. A novel cell set-up utilizing a double layered TiO2 film as top contact and a thin layer of quasi-solid polymer electrolyte as back contact was used and a significant enhancement in cell efficiency was observed for assemblies based on x0.2 samples, coincident with a structural transition of Bi1-xLaxFeO3 from ferroelectric to non-ferroelectric. The power conversion efficiency of the PV device was 0.13% for the cell with x=0.2at 1 sun irradiation. The short circuit current density for this La composition was 0.35mAcm(-2). A hysteretic behaviour was observed for higher La compositions when the scanning is from open-circuit (OP) to short-circuit (SC) which may be attributed to polarization effects. The results at x0.2 show an improved performance with respect to BiFeO3 based systems, suggesting the stabilization of the non-ferroelectric crystal structure leads either to a more efficient separation of photo-generated electron-hole pairs and/or enhanced charge transport. The findings represent a step towards the realisation of facile to fabricate, inorganic solid state photovoltaic devices.
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