Preparation and Photovoltaic Energy Storage of Graphene Micro-supercapacitors
Graphene oxide thin films deposited by the drop-in method were laser scribed.The formation of reduced graphene oxide can be verified by microscopy technologies.Laser scribing parameters were optimized through the square resistance measurement of reduced graphene oxide.Next,the graphene oxide films were prepared on the backside of amorphous silicon solar modules.Planar interdigital electrodes of micro-supercapacitors were fabricated by laser scribing.Five electrodes were connected in series for photovoltaic energy storage under high operating voltages.The integrated energy storage device demonstrates high cycling stability,in which 99.85%of initial capacitance is retained after 50 charge/discharge cycles.This study provides an innovative pathway for the design and fabrication of integrated devices for photovoltaic energy storage.
photovoltaic energy storagelaser-scribedgraphenemicro-supercapacitorhigh operating voltage
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