| 초록 |
PEDOT:PSS has high electrical conductivity, and can effectively transport holes by reducing the contact barrier between the ITO and the photoactive layer (solar cell) or the light emitting layer (light emitting device). However, the deposition of a PEDOT:PSS solution on ITO glass deteriorates the device performance and durability, as its strong acidic condition with pH ~2 can dissolve the metal components, including indium element. Especially, during the spin-coating process of a PEDOT:PSS layer, the sulfonate groups in the PSS dopant can accelerate the dissolution of heavy metal components in ITO. In this study, in order to minimize the effect of PEDOT:PSS on ITO, a graphene layer was introduced between the active layer composed of PTB7: PC70BM and the ITO glass substrate, and the PEDOT:PSS layer was introduced into the hole transport buffer layer to reduce the limitations of PEDOT:PSS and effectively transport holes Improved. |
