New organic discotic materials for photovoltaic conversion

作者：Oukachmih M; Destruel P^*; Seguy I; Ablart G; Jolinat P; Archambeau S; Mabiala M; Fouet S; Bock H

来源：Solar Energy Materials and Solar Cells, 2005, 85(4): 535-543.

DOI：10.1016/j.solmat.2004.05.012

• organic
• photovoltaic
• discotic molecules

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.

• 出版日期2005-2-1