The current-voltage (I-V) measurements were carried out with an active area of 0.16 cm2
by a Kiethley
2400 source meter, Kiethley 617 programable electrometer measured unit under AM 1.5 global simulated sunlight
(100 mW/cm
2
) which was produce by a 500 W Oriel Solar Simulator (New Port BB-L, USA).