| 초록 |
Organic-inorganic metal halide such as methyl ammonium lead iodide (CH3NH3PbI3) have recently employed as a promising material for next generation photovoltaics due to long exciton diffusion length, good charge mobility, intense light absorption and proper band gap. In particular, interest in perovskite/1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) planar heterojunction solar cells composed of indium tin oxide(ITO)/poly (3, 4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) hole transporting layer(HTL)/CH3NH3PbI3/ PCBM/metal cathode have attracted significant attention. Among main components, PEDOT:PSS HTL has latent problems such as poor long-term stability and large mismatched work function with energy level of perovskite layer. In this study, we investigated 2-D carboneous materials/polymer composite as buffer layer to improve efficiency and stability. Their electrical and optical property as well as their effect on the performance of devices will be discussed. |
