Impact of TiO2 Nanostructures on Dye-Sensitized Solar Cells Performance.
Paweł GnidaPaweł JarkaPavel ChulkinAleksandra DrygałaMarcin LiberaTomasz TańskiEwa Schab-BalcerzakPublished in: Materials (Basel, Switzerland) (2021)
The effect of TiO2 nanostructures such as nanoparticles, nanowires, nanotubes on photoanode properties, and dye-sensitized solar cells photovoltaic parameters were studied. The series of dye-sensitized solar cells based on two dyes, that is, commercially N719 and synthesized 3,7'-bis(2-cyano-1-acrylic acid)-10-ethyl-phenothiazine were tested. Additionally, the devices containing a mixture of this sensitizer and chenodeoxycholic acid as co-adsorbent were fabricated. The amount of adsorbed dye molecules to TiO2 was evaluated. The prepared photoanodes with different TiO2 nanostructures were investigated using UV-Vis spectroscopy, optical, atomic force, and scanning electron microscopes. Photovoltaic response of constructed devices was examined based on current-voltage characteristics and electrochemical impedance spectroscopy measurements. It was found that the highest UV-Vis absorption exhibited the photoanode with nanotubes addition. This indicates the highest number of sensitizer molecules anchored to the titanium dioxide photoanode, which was subsequently confirmed by dye-loading tests. The highest power conversion efficiency was (6.97%) for solar cell containing nanotubes and a mixture of the dyes with a co-adsorbent.
Keyphrases
- solar cells
- aqueous solution
- visible light
- high resolution
- quantum dots
- highly efficient
- ionic liquid
- single molecule
- single cell
- stem cells
- magnetic resonance imaging
- wastewater treatment
- gold nanoparticles
- cell therapy
- magnetic resonance
- high speed
- computed tomography
- electron microscopy
- molecularly imprinted
- atomic force microscopy
- perovskite solar cells