| 초록 |
Organic-inorganic metal halide has been emerged 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, interested in perovskite/PCBM planar heterojunction solar cells consisting of indium tin oxide(ITO)/poly(3,4-ethylenedioxythiophene) : poly (styrene sulfonate) (PEDOT:PSS) hole transport layer(HTL)/ perovskite/PCBM/metal cathode have attracted considerable attention owing to easy solution processability at low temperature. However, conventional PEDOT: PSS HTL has latent problems such as high acidity, hygroscopic nature, inhomogeneous electrical properties, and a poor electron blocking ability. In this study, we investigated a V2O5/PEDOT composite HTL to improve efficiency and stability. Electrical, optical and structural characteristics as well as their effect on the performance of devices will be discussed. |
