Journal Article PDMS PEDOT:PSS Research Support, Non-U.S. Gov't cesium lead halides electron-phonon coupling exciton quenching flexible electrodes graphene hole extraction layers inorganic halide perovskites light-emitting diodes, next-generation emitters metal foils metal nanofibers nanowire electronics organic electronic devices (OEDs) organic light emitting diodes organic/inorganic hybrid perovskites passivation perovskite light emitting diodes perovskite solar cells perovskites photoluminescence lifetime printed electronics roll-to-roll process self-organized silver nanowires solar cells transparent electrodes