| 초록 |
A hole transport/extraction layer (HTL/HEL) is required to reduce energy barrier between anode and highest occupied molecular orbital (HOMO) level of polymer active layer and to improve transport/extraction of holes. PEDOT:PSS is the most commonly used HTL/HEL material for organic optoelectronic devices, such as organic light emitting diodes (OLEDs) and organic solar cells (OSCs), because of its solution processability, work function, sufficient conductivity and high optical transparency in the visible-NIR region. However, highly hygroscopic and acidic nature of PEDOT:PSS increase degradation rate of devices. In this study, we introduced new conjugated polyelectrolytes (CPEs) as HTL/HEL to overcome drawbacks of PEDOT:PSS. We synthesized three polymers with different heterocyclic compounds and fabricated PLEDs and PSCs to characterize performance. Dipole moment of CPEs was changed by atomic radius of hetero atom in heterocyclic rings and changed surface potential of anode. |
