DSSC	Dye-sensitized solar cell
SRM	Solid redox mediator
PEO	Poly(ethylene oxide)
SN	Succinonitrile
bpy	tris-(2,2′-bipyridine)
TFSI	bis(trifluoromethyl) sulfonylimide
CF3SO3	Triflate, trifluoromethanesulfonate
ClO4	Perchlorate
IS	Impedance spectroscopy
FT-IR	Fourier-transform infrared spectroscopy
XRD	X-ray diffractometry
XPS	X-ray photoelectron spectroscopy
SEM	Scanning electron microscopy
DSC	Differential scanning calorimetry
TGA	Thermogravimetric analysis
σ	Electrical conductivity
Ea	Activation energy
σo	Pre-exponential factor
kB	Boltzmann constant
To	Free-volume temperature
Tm	Melting temperature
R = Intensity/width	where width is full width at half maximum
ΔP	The position of the element of M2A, M2B, or M3 relative to that of M1