Highly conductive and stable graphene/PEDOT:PSS composite as a metal free cathode for organic dye-sensitized solar cells.

ABSTRACT: Platinum (Pt) as the counter electrode (CE) in dye-sensitized solar cells (DSSCs) is expensive and non-optimal for cobalt(ii/iii) redox couples, which can tune and improve the performance of DSSCs, thus motivating the search for replacements of the Pt CE. Graphene nanoplatelets (GnPs) are possible alternatives to Pt CEs but they are mechanically unstable as CEs due to their poor substrate adhesion. Here we report a new type of PEDOT:PSS (PP)/GnP (PPG) composite that maintains the catalytic performance of GnPs with enhanced adhesion to the substrate via a conductive PEDOT matrix. The resultant PPG exhibited extremely low charge-transfer resistance (R _ct) compared to Pt in its role as an electrocatalyst toward a Co(bpy)₃ ^2+/3+ (bpy = 2,2'-bipyri

SUBMITTER: Kim JC 

PROVIDER: S-EPMC9080595 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature