Photovoltaic Properties Of Bulk-heterojunction Solar Cell By Enhancing Absorption Band In Polyfulorene Copolymer Blend

In this thesis, the photovoltaic properties of the blended polymer of APFO-G6 havernbeen investigated based on enhancing its absorbance. The structure of the blendedrnpolymer was ITO/PEDOT:PSS/D75:APFO-G6:PCBM/Al. The electrical propertiesrnwere studied using Current Voltage (J-V) characteristics and Impedance spectroscopyrn(IS) measurement. The optical absorption spectrum was measured using UV/VIS/NIRrnSpectrometer. The J-V plot shows the structure has photovoltaic properties.Thernabsorbtion spectrum shows the structure absorbed as needed in the extended visiblernregion of the spectrum. Fill factor and the ef ciency was improved due to incrementrnof absorbance. And according to impedance Spectroscopy measurement, the Cole-rnCole plot shows the depletion resistance and capacitance depend on the bias voltage

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