Effective oxygen plasma treatment on indium tin oxide electrode to improve organic solar cell efficiency

摘要

In the current study, the effects of oxygen (O_2) plasma treatment on indium tin oxide (ITO) and its correlation to the efficiency of organic solar cells (OSCs) were investigated. The O_2 plasma treatment is able to remove impurities of the ITO surface and increase its surface energy to match the water-based poly (3,4-ethylenedioxythiophene): poly (styrencsulfonate) (PEDOT:PSS) solution. The strong polar interaction from the O_2 plasma-treated ITO surface helps in the conformational change of the PEDOT chain from a benzoid to a quinoid structure, which improves film quality and the efficiency of organic solar cells.