Quasi Solid-State Dye-Sensitized Solar Cell Incorporating Highly Conducting Polythiophene-Coated Carbon Nanotube Composites in Ionic Liquid

Table 1

Photovoltaic properties of the DSCs with MWNT-PTh/PMII composite electrolyte and with bare PMII electrolyte using Pt/ITO and bare ITO as counterelectrode.^a

Electrolyte	Counterelectrode	𝐽sc (mA cm^−2)	𝑉oc (V)	FF	η(%)
PMII	Pt/ITO	1.3	0.68	0.33	0.29
MWNT-PTh/PMII	Pt/ITO	10.2	0.73	0.64	4.76
PMII	ITO	1.0	0.49	0.27	0.13
MWNT-PTh/PMII	ITO	7.6	0.62	0.60	2.83
Liquid electrolyte ^b	Pt/ITO	15.4	0.70	0.73	7.86

^aConditions: sealed cells; dye: N719; coadsorbate: DCA 40 mM; photoelectrode: TiO₂ (15 μm thickness and 0.25 cm²); irradiated light: AM 1.5 solar light (100 mW cm⁻²). 𝐽_sc: short-circuit photocurrent density; 𝑉_oc: open-circuit photovoltage; FF: fill factor; η: total power conversion efficiency.
^bLiquid electrolyte was composed of 0.6 M dimethylpropyl-imidazolium iodide (DMPII), 0.05 M I₂, and 0.1 M LiI in acetonitrile.