Tóm tắt

In this work, we fabricated solar cells and panel using net-like CoS2nanostructure as Counter Electrodern(CE) spray coated on Ag grid embedded on flexible plastic Poly-Ethylene Terephthalate (PET) substrate.rnThe spray coated CoS2 thin film revealed its form to be a hierarchical net-like nano-structure. ThernTiO2:N3 dye and phthaloylchitosan-based gel-polymer electrolyte as the redox electrolyte layers ofrnFlexible Organic Solar Panel (FOSP) was fabricated using screen printing technique. Then both segmentsrnwere sandwiched to form flexible solar panel. The fabricated solar cell showed a Power ConversionrnEfficiency (PCE org) of 7.09% with a fill factor (FF) of 0.64, Jsc of 17.51 mA/cmrn2rn, and an open circuit volt-age (Voc) of 0.65 V, which was comparable to that of Platinum (Pt) CE (g= 7.82%). Similarly, for FOSPrnshowed PCE of 7.04%, FF of 0.62, Isc of 67 mA and Voc of 60 V. The FOSP was connected to buck converterrnwith Maximum Power Point Tracking (MPPT) using a modified Fractional Open Circuit Voltage (FOCV)rncombined with Duty-cycle Derivative of Output Voltage (DDOV) algorithms, Buck Boost converterrn(BBC) works from 60 to 5.8 V in buck mode, the output is connected to a battery. For voltages less thanrn8 V the power converter works in boost mode (up to 3.8 V), a micropower harvester would be very usefulrnmany handheld gadgets