Characterization Of Alternating Polyfluorene Green-6 And 66-phenyl C61-butyric Acid Methyl Ester(pcbm) Based Bulk Heterojunction Solar Cell

Photovoltaic device based on blend of alternating polyrnuorene green-6 (APFO Green-rn6) and [6,6]-phenyl C61-butyric acid methyl ester(PCBM) in a sandwich structure ofrnITO/PEDOT-PSS/APFO Green-6:PCBM/Al was fabricated. The device was characterizedrnby analyzing the current density-voltage measurements under dark andrnillumination as well as by impedance spectroscopy. The observed J-V curve underrndark agree well with the trap-controlled space charge limited transport theory. Thernmain solar cell parameters recorded at room temperature under 80mA/cm2 whiternlight intensity are: VOC = 547mV, JSC = 0.314mA/cm2, with power conversion ef-rn ciency 0.107 %, and ll factor, of 0.5. The complex impedance analysis exhibits arnbias voltage dependent whose Cole-Cole plot is a single semicircle. This is modelledrnby one parallel RC circuit, usually obtained from metal-semiconductor(MS) device

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