Author/Authors :
Oukachmih، نويسنده , , M. and Destruel، نويسنده , , P. and Seguy، نويسنده , , I. and Ablart، نويسنده , , G. and Jolinat، نويسنده , , P. and Archambeau، نويسنده , , S. and Mabiala، نويسنده , , M. and Fouet، نويسنده , , S. Allan Bock، نويسنده , , H.، نويسنده ,
Abstract :
Two-layer organic photovoltaic cells have been fabricated using a triphenylene ether as a hole transporting material, and perylene derivatives as electron transporting materials. Three devices were studied and showed external quantum efficiencies of around 3%. These results are interpreted in the context of electrochemical measurements that provide the ionization potential and electron affinity. Furthermore, the high-exciton diffusion lengths and absorption coefficients contribute to the high-observed photocurrents. The organic/organic interface was found to be the main origin of the photocurrent generation. However, the photovoltaic parameters were found to be dependent also on the ITO/organic interface. In particular, we show that ITO treatments with argon plasma and UV–ozone modify the open-circuit voltage.
