TY - GEN
T1 - Optically transparent graphene nanoplatelet inks as low cost electrocatalysts for liquid dye sensitised solar cells
AU - Baker, J.
AU - Watson, T.M.
AU - Jones, D.
AU - Deganello, D.
AU - Gethin, D.T.
AU - Claypole, T.C.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Graphene nanoplatelets (GNPs) functionalised with platinum were explored as the active material in a high specific surface area ink. The ink had a transmission at 550nm (T550) = 85% and a charge transfer resistance (Rct) of 6Ω/cm2. Although the Rct is higher than required for laboratory cells having a Jsc of 20mA/cm2 under 1 sun test conditions it is sufficient for industrially produced reverse devices, especially when utilised for indoor applications where light conditions will be lower than 100W/m2. This was demonstrated by reverse illuminated DSC efficiencies with flexible cathodes which were equivalent to cells with sputtered platinum catalysts when subjected to 300W/m2 lighting or less. A modification to the ink, suitable for catalysing a Co2+/3+ electrolyte having an Rct of 2Ω/cm2 and T550=85% was undertaken. This demonstrates potential for use in high efficiency cobalt mediated DSCs. The work shows that printed graphene catalysts are a versatile low cost replacement to sputtered platinum in reverse illuminated DSCs for dye sensitised solar cells.
AB - Graphene nanoplatelets (GNPs) functionalised with platinum were explored as the active material in a high specific surface area ink. The ink had a transmission at 550nm (T550) = 85% and a charge transfer resistance (Rct) of 6Ω/cm2. Although the Rct is higher than required for laboratory cells having a Jsc of 20mA/cm2 under 1 sun test conditions it is sufficient for industrially produced reverse devices, especially when utilised for indoor applications where light conditions will be lower than 100W/m2. This was demonstrated by reverse illuminated DSC efficiencies with flexible cathodes which were equivalent to cells with sputtered platinum catalysts when subjected to 300W/m2 lighting or less. A modification to the ink, suitable for catalysing a Co2+/3+ electrolyte having an Rct of 2Ω/cm2 and T550=85% was undertaken. This demonstrates potential for use in high efficiency cobalt mediated DSCs. The work shows that printed graphene catalysts are a versatile low cost replacement to sputtered platinum in reverse illuminated DSCs for dye sensitised solar cells.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84924308190&partnerID=MN8TOARS
U2 - 10.1557/opl.2014.684
DO - 10.1557/opl.2014.684
M3 - Chapter in a published conference proceeding
VL - 1667
SP - 1
EP - 6
BT - Materials Research Society Symposium Proceedings
PB - Springer
ER -