| 초록 |
The choice of interfacial layers in organic solar cells (OSCs) is important for enhancing their power conversion efficiency (PCE) and stability. PEDOT:PSS is the most widely utilized hole transport layer (HTL); however, device stability is often severely degraded, due to the strong acidity and hygroscopicity of PEDOT:PSS. In this study, we report a new efficient HTL system comprising an oligo(aniline) host (PBD) and a protonic acid dopant (PFBSA), and demonstrate its use in OSC devices. Desirable properties like high transmittance, excellent conductivity, and appropriate work function establish the suitability of the PBD:PFBSA film as an HTL. Thus, a PBD:PFBSA HTL is employed in the PM6:Y6-based OSC system to achieve a PCE of 15.24%. Notably, the PBD:PFBSA HTL-based OSC exhibits significantly higher device stability than the PEDOT:PSS HTL. Our results highlight the successful design of an oligo(aniline)-based material and its practical application as a persuasive HTL for OSCs. |
