[2PS-111]
Steady-State Stability of High Reverse Bias with Dark Current Suppression via Molecular Alignment of BTP-eC9-based Ternary Optoelectronics
발표자임지현 (중앙대학교)
연구책임자왕동환 (중앙대학교)
Abstract
In this study, the non-fullerene acceptor BTP-eC9 based on a ternary bulk heterojunction (BHJ) was utilized to achieve stable molecular arrangement, effectively suppressing dark current and ensuring stability under high reverse bias conditions. Organic materials based on a binary BHJ are widely used for efficiency, but they have limitations in terms of stable operation at high reverse bias. Therefore, by forming a PM6:BTP-eC9:Y12 ternary BHJ, the molecular arrangement and energy levels were aligned, enhancing stable dark current suppression and achieving stable light responsivity and detectivity under high reverse bias conditions. Additionally, the steady-state stability of dark current was investigated in real time, observing changes in dark current as high reverse bias. More stable dark current and noise suppression were observed in the ternary-based organic photodetector. Notably, clear signals were sustained at bias variations (at -3V) when driving a photoplethysmography sensor.