Solid-state photoelectrochemical cell using a polythiophene derivative as photoactive electrode

In this work, we investigated the photoelectrochemical behavior of poly(4,4 ' -dipentoxy-2,2 ' -bithiophene), poly(ET2), as a single electrode in a li quid electrolyte and also its use in a solid-state photoelectrochemical dev ice using a polymeric electrolyte. The results showed a strong dependence o f the photocurrent density on the type and concentration of the redox coupl e. The solid-state device exhibited a short-circuit current density of 4 mu A cm(-2) and an open-circuit voltage of 9 mV. The maximum quantum yield of photocurrent in the visible range was 0.17%, high when compared to other ph otoelectrochemical devices based on organic materials; however, it is low i n comparison to solid-state devices using inorganic materials. This paper s hows the viability of using organic polymeric electrolytes in the construct ion of photoelectrochemical devices, (C) 2001 Elsevier Science BN. All righ ts reserved.