Abstract
Dye-sensitized solar cells (DSCs) were prepared using porous zinc oxide (ZnO) films on aluminum-doped zinc oxide (AZO) and fluorine-doped tin oxide (FTO) transparent conductive glass substrates. X-ray diffraction measurements revealed that, the porous ZnO films were crystallographically oriented differently on the two transparent substrates. The two DSCs were prepared using metal-free indoline dye as the sensitizer and a liquid electrolyte as the hole conductor. Measurements of the power conversion efficiency of the two DSCs over a period of time showed deterioration in the conversion efficiency of the DSCs with the deterioration being faster in ZnO/FTO than ZnO/AZO. The deterioration is attributed mainly to the decrease in light-harvesting ability of the sensitizer and recombination of photo-excited electrons resulting in the decrease in the short-circuit photocurrent densities and the open-circuit voltages in both DSCs during the light-soaking process.
Original language | English |
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Pages (from-to) | 949-958 |
Number of pages | 10 |
Journal | AIMS Energy |
Volume | 6 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- Crystallographic orientation
- Photovoltaic
- Semiconductor
- Spray deposition
- Thin film
- Transparent conductor