In this paper two different methods, doctor blade of a paste and glancing angle deposition (GLAD), have been used to fabricate layers of titanium dioxide for use in organic solar cells. Doctor blade TiO2 consists of a random network of nanocrystals with an average pore size of about 9 - 10nm. Controlled nanometre-scale columnar structures of TiO2 with column spacing between 50 and 100nm were obtained using the GLAD process. Solar cell based on GLAD films gave performances inferior to doctor blade TiO2 devices. The optical property of the TiO2 has been identified as a possible influential factor limiting the solar cell efficiency of GLAD-based devices.
