EXTERNALLY UNBIASED ELECTRON INJECTION FROM COPPER OXIDE TO POROUS NANOCRYSTALLINE TITANIUM DIOXIDE

摘要

Unbiased electron injection from copper oxide to TiO2 is demonstrated in a photoelectrode made of a TiO2-copper oxide heterojunction which is obtained using a photochemical deposition technique on porous TiO2 and ITO as conducting substrate. Different technological alternatives for photochemically producing the thin copper oxide absorber are studied and characterized. The photocurrent dependences with time when illuminated corresponding to different sample type are compared and studied.