جۆری توێژینه‌وه‌ : Original Article

نوسه‌ران

• Nabeel A Bakr ¹
• AbdulRahman K Ali ²
• Shaimaa M Jassim*

¹ Department of Physics, College of Science, University of Diyala, Diyala, Iraq

² Department of Applied Science, University of Technology, Baghdad, Iraq

پوخته‌

In this work, DSSCs have been fabricated successfully using a simple
procedure without the need for any complicated facilities. The XRD analysis of the
TiO2 film confirmed that it has a polycrystalline structure belonging to anatase
phase with crystallite size of 12.4 nm. UV-Vis spectroscopy was used to
characterize the absorbance spectrum of the TiO2 film and Z907 dye. The energy
gap of the TiO2 film estimated by Tauc’s plot was 3.12 eV. The SEM micrograph of
the TiO2 film shows that the layer has a spongy shape with reduction in the number
of open pores making easy for dye adsorption and electron transport. The AFM
micrograph and the granularity cumulative distribution chart of the TiO2 film shows
that the average roughness, root mean square roughness and average grain size
were about 0.356 nm, 0.423 nm and 82.48 nm respectively. The DSSC fabricated
using glass substrates coated with 8 Ω/ sheet resistance FTO achieved the highest
short circuit density (JSC) and conversion efficiency (η) of 4.069 mA/cm2
and
1.786 %, respectively. Subsequently, the enhancement in efficiency was ~ 84 %
compared with the conversion efficiency of DSSC fabricated using glass substrates
coated with 15 Ω/ sheet resistance FTO.

وشه‌ بنچینه‌ییه‌كان

• DSSC
• Z907 Dye
• TiO2 Layer
• FTO Sheet Resistance
• Efficiency Enhancement