TY - JOUR T1 - Nanoporous reduced graphene oxide and polymer composites as efficient counter electrodes in dye-sensitized solar cells JF - ACS Applied Electronic Materials Y1 - 2020 A1 - Sudhakar, Vediappan A1 - Singh, Anup Kumar A1 - Chini, Mrinmoy Kumar KW - counter electrode KW - Dye-sensitized solar cells KW - electrocatalytic activity KW - PEDOT:PSS KW - Reduced graphene oxide AB -

The introduction of an efficient and precious platinum (Pt) free counter electrode (CE) for dye-sensitized solar cells (DSSCs) is an important aspect to address. In this report, we have employed nanoporous reduced graphene oxide (PG) containing PEDOT:PSS-PG composite on FTO substrate as CEs, which have shown excellent diffusion of I-3(-), remarkable photocatalytic activity, and better device performance along with desired stability. The investigated cathode material has been prepared by mixing PGs and highly conducting PEDOT:PSS. Experimental measurements and analyses such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and so on indicate that PEDOT:PSS-PG is a promising cathode material for a Pt-free CE in DSSCs. EIS indicates that the PEDOT:PSS-PGs have lower interfacial charge-transfer resistance because of their high electrical conductivity and superior electrocatalytic activity. The achieved photoconversion efficiency (eta) of a DSSC employing the Pt-free PEDOT:PSS-PG/FTO CE is 9.57%, which is found to be comparable to that of Pt/FTO CE based DSSC (9.64%) under a simulated solar light illumination of 100 mW/cm(2).

VL - 2 IS - 3 U3 -

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