| 초록 |
We demonstrate that radiation-induced reduced graphene oxide (RrGO) can efficiently function as a hole transporting layer (HTL) for polymer solar cells (PSCs). The solution-processable RrGO was simply obtained by γ-ray irradiation of a graphene oxide (GO) solution dispersed in ethanol and water. Changes in the chemical composition, conductivity, work-function, and morphology in RrGO films that resulted from the increase in absorbed dose amounts were systematically investigated. In addition, the best RrGO-based PSC showed comparable cell performance to the conventional poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS)-based PSC and better stability than PEDOT:PSS, indicating that the use of the RrGO is more desirable as an efficient HTL than the PEDOT:PSS for high-performance and high-stability PSCs. |
